Math Workspace (CAS)

Symbolic algebra, calculus, equation solving, and interactive plotting with LaTeX

Spreadsheet Calculator

Grid-based calculator with formulas, ranges, and CSV import/export

RPN Calculator

42S-style scientific RPN calculator with a four-level stack, programmable commands, and shareable sessions

Proof Builder

Line-by-line LaTeX proof editor with templates, snippets, and drag-and-drop reordering

2D Graphing

Graph one or more functions of x with interactive zoom and axis controls

3D Graphing

Surface plotter for z=f(x,y) with camera presets, wireframe, and contours

Turtle Geometry

Program a turtle with repeat blocks, step playback, and shareable path drawings

Escape-Time Fractals

Explore Mandelbrot, Julia, Burning Ship, and Multibrot fractals with interactive pan/zoom and exact view sharing

IFS Fractals

Generate Barnsley fern, affine trees, and other iterated function system fractals

Fractal Curves

Build Koch, Dragon, Sierpinski, and related recursive curve fractals

Chaotic Attractors

Visualize Lorenz, Clifford, and De Jong attractors with parameter-driven trajectories

Percentage

Percentage of a value, percentage change, and increase/decrease

Fraction

Fraction arithmetic and simplification

Ratio

Ratio calculator and solver

Proportion

Solve proportions given three of four values

Average

Mean, median, and mode of a number set

Standard Deviation

Spread and variance of a data set

Prime Factorization

Find prime factors of an integer

GCD/LCM

Greatest common divisor and least common multiple

Logarithm

Logarithm calculator for any base

Exponent

Power calculator for base and exponent

Scientific Notation

Convert numbers to and from scientific notation

Number Base Converter

Convert decimal numbers to binary, octal, and hexadecimal

Unit Dimension Checker

Verify dimensional consistency using SI base exponents

Prime Factorization

Prime factors, divisors, sigma function, and Euler totient

Modular Arithmetic

Mod arithmetic, modular inverse, and Chinese Remainder Theorem

Graph Theory

Connectivity, shortest paths, spanning tree weight, and graph properties

Boolean Algebra

Quine-McCluskey simplifier with compact K-map output

Triangle

Area, perimeter, and angles of a triangle

Circle

Area and circumference from radius or diameter

Rectangle

Area, perimeter, and diagonal of a rectangle

Polygon

Regular polygon area and properties

Sphere

Volume and surface area of a sphere

Cylinder

Volume and surface area of a cylinder

Cone

Volume and surface area of a cone

Pyramid

Volume and surface area of a pyramid

Pythagorean

Right triangle solver using the Pythagorean theorem

Quadratic Formula

Solve ax² + bx + c = 0 for x

Linear Equation

Solve linear equations for x

Systems of Equations

Solve 2x2 and 3x3 systems of equations

Polynomial Roots

Find zeros of a polynomial

Factoring

Factor algebraic expressions

Matrix Calculator

Determinant, inverse, and eigenvalues for 2x2 matrices

Poker Hand Odds

Probability estimates for common poker hands with pot-odds comparison

Texas Hold'em Outs

Outs-based draw probability and pot-odds edge calculator

Blackjack Odds

Action EVs and basic-strategy recommendation under configurable blackjack rules

Blackjack Card Counting

True count, advantage estimate, and Kelly-style bet sizing

Dice Probability

Exact probability for dice sums, thresholds, and ranges

Normal Distribution

Z-scores, percentile rank, and interval probabilities

Binomial

Binomial probability calculator

Poisson

Exact and cumulative Poisson probabilities

Chi-Square

Chi-square goodness of fit test

Hypothesis Test

One-sample z, t, and proportion tests with p-values and decisions

ANOVA

One-way ANOVA with F statistic, p-value, and eta-squared

Confidence Interval

CI calculator from sample mean, SD, and size

Sample Size

Required sample size for margin of error

Permutations

nPr permutation calculator

Combinations

nCr combination calculator

Combinatorics

Permutations, combinations, multichoose, and derangements

Expected Value

Weighted average, variance, and standard deviation from weighted outcomes

Bayes' Theorem

Posterior probability from prior and likelihood

Monte Carlo Simulator

Seeded simulation over random variable inputs with confidence intervals

Regression Calculator

Linear, polynomial, exponential, and logarithmic regression fits

Probability Distribution Plotter

PMF and CDF visualization for binomial distributions

Laplace Transform

Forward and inverse Laplace transforms for common canonical signal families

Fourier Transform

Continuous Fourier transform with magnitude and phase evaluation

Discrete Fourier Transform (DFT)

DFT/IDFT with frequency bins and spectrum summary

Z-Transform

Z-transform with ROC, poles/zeros, and inverse sequence forms

Convolution

Discrete linear convolution and continuous exponential-pair convolution

Taylor/Maclaurin Series Expansion

Series coefficients, approximation value, and remainder estimate

Eigenvalue & Eigenvector

Characteristic polynomial, eigenvalues, and eigenvectors for 2x2 matrices

Matrix Decomposition

LU, QR, SVD, and Cholesky decompositions for 2x2 matrices

Velocity

Speed, distance, and time calculator

Acceleration

Kinematic calculator from known values

Force

F = ma force calculator

Momentum

p = mv momentum calculator

Kinetic Energy

KE calculator from mass and velocity

Potential Energy

PE calculator from mass and height

Projectile Motion

Trajectory calculator from velocity and angle

Orbital Mechanics

Orbital period, velocity, energy, and Hohmann transfer estimate

Circuit Analysis (RLC)

Impedance, phase angle, resonance, Q factor, and bandwidth

Thermodynamics State

Idealized air or steam-vapor state from two known thermodynamic properties

Wave Interference

Wave superposition, beat frequency, and resultant waveform samples

Radioactive Decay

Parent decay, activity, and optional daughter isotope build-up

Doppler Effect

Observed frequency and wavelength shift with optional relativistic correction

Friction

Friction force from normal force and coefficient

Ohm's Law

V = IR voltage, current, and resistance

Power (Electrical)

Electrical power from voltage and current

Wavelength

Wave properties from frequency and speed

Decibel

Sound intensity and power ratio calculator

Transfer Function Analyzer

Poles, zeros, DC gain, and compact Bode plus time-response samples

PID Controller Tuner

Ziegler-Nichols, Cohen-Coon, and IMC PID tuning from a FOPDT plant

Filter Design

Biquad filter coefficients, pole-zero data, and response samples

Nyquist Sampling

Minimum sampling rate and aliasing analysis for a chosen sample rate

Molar Mass

Molecular weight from chemical formula

Molarity

Solution concentration from solute and volume

Dilution

C1V1 = C2V2 dilution calculator

Chemical Equation Balancer

Balance reaction equations and inspect the underlying linear system

pH Calculator

pH, pOH, and hydrogen ion concentration

Ideal Gas Law

PV = nRT with any variable as unknown

Electrochemistry Cell Potential

Standard voltage, Gibbs free energy, equilibrium constant, and Nernst correction

Stoichiometry

Reaction calculator from balanced equation

Percent Composition

Element percentages in a compound

Empirical Formula

Determine formula from mass data

Mortgage Payment

Monthly payment with principal, interest, taxes, insurance, and PMI

Mortgage Affordability

How much house you can afford based on income and debts

Refinance Break-Even

When refinancing pays off given new terms and closing costs

ARM vs Fixed

Compare adjustable-rate vs fixed-rate mortgages

Rent vs Buy

Compare renting vs buying based on costs and appreciation

Auto Loan

Car payment calculator with down payment and trade-in

Personal Loan

Unsecured loan payment calculator with fees

Student Loan

Education debt planning across repayment plans

Loan Payoff

Impact of extra payments on payoff timeline

Debt Snowball

Debt payoff optimizer using smallest-balance-first method

Debt Avalanche

Interest-optimized debt payoff strategy

HELOC

Home equity line of credit calculator

Credit Card Payoff

Payoff timeline with promo APR and regular APR phases

Loan Comparison

Compare two loan offers including APR, term, fees, and total cost

Renter Affordability

Recommended max rent based on income, debt, and utilities

Cash-Out Refinance Comparison

Compare cash-out refi costs against current mortgage terms

ARM Reset Shock

Payment impact simulation when ARM rate resets

Mortgage Buydown

Points cost, payment savings, and break-even timeline

Compound Interest

Growth over time with compounding frequency options

Savings Goal

Time and contributions needed to reach a savings target

401(k)

Retirement account growth with employer match

Roth vs Traditional

IRA comparison based on current vs retirement tax rates

Required Minimum Distribution

RMD calculator based on account balance and age

Social Security

Benefit estimator based on earnings and claiming age

Retirement Income

Withdrawal planning with inflation adjustment

FIRE Calculator

Financial independence and early retirement planning

Dollar Cost Averaging

DCA vs lump sum investment comparison

Stock Return

Total return including dividends over a holding period

Dividend Reinvestment

DRIP calculator with dividend growth rate

Bond Yield

Yield to maturity and current yield calculator

Emergency Fund

How much to save based on expenses and risk tolerance

Net Worth Tracker

Assets minus liabilities with category-level totals

Income Tax Estimator

Federal income tax calculator by filing status

Tax Bracket

Find your marginal tax rate and bracket

Paycheck

Take-home pay after taxes and deductions

Self-Employment Tax

SE tax on net self-employment income

Capital Gains

Tax on investment gains by holding period

Tax Withholding

W-4 optimizer for accurate withholding

Estimated Tax

Quarterly estimated tax payment calculator

HSA Tax Savings

Health savings account tax benefit calculator

529 Tax Benefits

Education savings plan tax calculator

Property Tax

Real estate tax estimator with exemptions

Social Security Tax Torpedo

Taxable Social Security impact from additional withdrawals

Break-Even Analysis

Unit and revenue break-even point calculator

Profit Margin

Gross and net margin from revenue and costs

Markup Calculator

Price calculation from cost and markup percentage

Cash Flow

Operating cash flow analysis

NPV

Net present value of future cash flows

IRR

Internal rate of return for investment decisions

ROI

Return on investment from gain and cost

Payback Period

Time to recoup an initial investment

Business Valuation

Simple valuation using revenue and earnings multiples

Invoice Payment Terms

Net 30/60/90 with early payment discount

Rental Property

NOI, cap rate, and cash-on-cash return for rentals

Life Table / Mortality

Survival probability and life expectancy estimates from modeled mortality tables

Annuity Present Value (Actuarial)

Actuarial present value for whole life, temporary, and deferred annuities

Net Single Premium

Whole life, term life, and endowment net single premium factors and premium

Actuarial Reserve

Prospective reserve for in-force whole life, term, and endowment policies

Survival Analysis

Parametric survival and hazard outputs for exponential, Weibull, and Gompertz models

Risk & Ruin Probability

Ruin probability bounds via Cramer-Lundberg assumptions

Concrete Volume

Cubic yards or meters needed for a pour

Concrete Mix

Number of bags needed for a given volume

Rebar Spacing

Reinforcement layout for slabs and walls

Beam Sizing

Simple beam calculator for span and load

Joist Spacing

Floor joist layout by span and lumber size

Stair Calculator

Rise, run, and headroom for stairway design

Ramp Slope

ADA compliance checker for ramp grade

Footing Size

Foundation sizing by load and soil capacity

Retaining Wall

Block and material estimator for retaining walls

Post Spacing

Deck and fence post layout calculator

Lumber

Board feet calculator for dimensional lumber

Drywall

Sheets needed for room dimensions and openings

Paint Coverage

Gallons needed by wall area and number of coats

Flooring

Square footage with waste factor for flooring

Tile

Tiles and grout needed for a given area

Roofing Squares

Shingles and materials by roof dimensions and pitch

Siding

Material estimation for exterior siding

Insulation

Batts or blown-in insulation by area and R-value

Brick/Block

Masonry units needed for wall dimensions

Gravel/Mulch

Cubic yards needed by area and depth

Fence Materials

Posts, rails, and pickets for fence construction

Wire Size

Ampacity calculator for conductor sizing

Voltage Drop

Voltage drop over wire distance and gauge

Electrical Load

Panel load calculator for all circuits

Conduit Fill

Maximum wires allowed in a conduit size

Circuit Breaker

Breaker sizing by load and wire size

Pipe Sizing

Flow rate calculator by fixture units

Water Heater

Size needed based on household and usage

Drain Slope

Proper drainage pitch by pipe diameter

Water Pressure

Pressure loss from elevation, pipe length, and fittings

BTU Calculator

Heating and cooling load by square footage

Duct Sizing

CFM and duct dimensions for room airflow

HVAC Load

Simplified Manual J load calculation

Furnace Size

Heating capacity for home size and climate

AC Tonnage

Cooling capacity needed by area and exposure

Recipe Scaler

Multiply or divide recipe ingredient amounts

Serving Size

Per-person amounts from total quantity

Batch Calculator

Commercial batch sizing for large-scale recipes

Baker's Percentage

Flour-based ratios for bread recipes

Yeast Conversion

Convert between fresh, active dry, and instant yeast

Pan Size Converter

Volume equivalents across pan shapes and sizes

Egg Substitution

Replacement calculator for common egg substitutes

Flour Conversion

Volume to weight conversion by flour type

Hydration Calculator

Dough hydration percentage from flour and water weight

Sourdough

Starter feeding ratios and timing

Unit Converter

Volume and weight conversion for cooking

Temperature Converter

Fahrenheit, Celsius, and gas mark conversion

Cooking Time Scaler

Adjust cooking time for different portion sizes

Meat Cooking

Time and temperature by cut, weight, and doneness

Altitude Adjustment

High altitude baking adjustments

Cocktail Scaler

Scale cocktail recipes for batch preparation

ABV Calculator

Alcohol by volume from ingredient volumes and ABVs

Dilution Calculator

Ice and water dilution for spirits

Simple Syrup

Sugar-to-water ratios for 1:1 and rich syrups

Coffee Ratio

Brew ratio by coffee weight, water, and method

Tea Brewing

Steep time and temperature by tea type

Calorie Counter

Total calories from meal ingredients and amounts

Macro Calculator

Protein, carb, and fat breakdown by food

Recipe Nutrition

Per-serving nutrition facts for a full recipe

Caffeine Calculator

Daily caffeine intake tracker from beverages

Party Food

Food quantities for events by guest count and duration

Catering Calculator

Commercial quantities by headcount and menu

BBQ Planner

Meat per person by guest count and meat types

Pizza Party

Number of pizzas needed by guest count

BMI

Body mass index from height and weight

BMR

Basal metabolic rate by age, sex, height, and weight

TDEE

Total daily energy expenditure with activity level

Body Fat %

Body fat percentage using multiple methods

Ideal Weight

Ideal weight range by height, sex, and frame size

Waist-to-Hip Ratio

WHR calculator from waist and hip circumference

Lean Body Mass

LBM calculator from weight and body fat percentage

One Rep Max

1RM estimator from weight lifted and reps

Pace Calculator

Running pace, time, or distance from any two

Heart Rate Zones

Training zones from age and resting heart rate

Calories Burned

Calorie burn by activity, duration, and weight

Steps to Distance

Convert step count to distance by stride length

Swimming Pace

Pool and open water pace calculator

Cycling Power

Watts estimator from speed, weight, and grade

VO2 Max Estimator

Cardiorespiratory fitness estimate from heart-rate inputs

Running Race Predictor

Predict race times across distances from a known result

Target Heart Rate Planner

Zone-based target heart rate and workout duration planning

Calorie Deficit

Weight loss calculator from current weight and goal

Macro Split

Macro ratio calculator by calories and diet type

Protein Needs

Daily protein requirement by weight and activity

Water Intake

Hydration calculator by weight, activity, and climate

Intermittent Fasting

Eating window calculator from start time and fasting hours

Due Date

Pregnancy due date from last menstrual period

Ovulation

Fertility window from cycle length and last period

Medication Dosage

Weight-based dosing reference calculator

Blood Alcohol

BAC estimator from drinks, weight, sex, and time

Kidney Function

eGFR calculator from creatinine, age, and sex

Menstrual Cycle Tracker

Cycle and fertile window estimator with irregular cycle support

Medication Schedule Checker

Timing overlap checker for repeating medication schedules

Date Difference

Days, weeks, and months between two dates

Add/Subtract Days

Find a future or past date from a start date

Age Calculator

Exact age in years, months, and days

Weekday Finder

Day of the week for any date

Work Days

Business days between dates excluding holidays

Time Zone Converter

Convert time across multiple time zones

Unix Timestamp

Convert between Unix epoch and human-readable dates

Countdown

Days remaining until a target date

Time Duration

Hours and minutes between two times

Leap Year

Check whether a year is a leap year

Week Number

ISO week number for any date

Julian Date

Julian day number converter

Fuel Economy

MPG and liters per 100km calculator

Fuel Cost

Trip fuel expense from distance and efficiency

EV Range

Electric vehicle range from battery and efficiency

EV Charging

Charge time from battery size and charger power

Tire Size

Compare tire sizes and their effects

Speedometer Error

Speed difference from tire size changes

Engine Displacement

CC, CI, and liter conversion from bore and stroke

Horsepower

HP and torque converter from RPM

0-60 Time

Theoretical acceleration from HP and weight

Gear Ratio

Final drive calculator from tire size and gearing

Car Depreciation

Vehicle value over time by age and mileage

Lease vs Buy

Total cost comparison for leasing vs buying

Towing Capacity

Payload calculator from GVWR and curb weight

Lawn Area

Square footage for lawn dimensions and shapes

Fertilizer

Application rate by lawn size and product

Seed Coverage

Grass seed needed by area and seed rate

Mulch

Cubic yards of mulch by area and depth

Soil Amendment

Compost and amendment quantity for garden beds

Plant Spacing

Number of plants needed for area and spacing

Irrigation

Watering schedule by zone, plant type, and climate

Raised Bed Soil

Fill volume for raised bed dimensions

Room Area

Square footage from length and width

Wallpaper

Rolls needed for room dimensions and pattern repeat

Curtain Size

Window treatment sizing by window dimensions

Carpet

Yards or meters needed for room dimensions

Lighting

Lumens needed by room size and use

Ceiling Fan Size

Fan diameter for room square footage

AC Size (Room)

BTU needed for a single room

Electricity Cost

Power bill estimator from watts, hours, and rate

Water Usage

Water bill estimator from usage and rate

Solar Savings

PV system savings by roof size and location

Propane Tank

Days of fuel from tank size and daily usage

Generator Sizing

Required watts for appliances to power

Flight Time

Flight duration from origin and destination distance

Tip Calculator

Restaurant and travel tips with bill splitting

Currency Converter

Exchange rate calculator between currencies

Luggage Weight

Bag weight allocator for packing limits

Travel Budget

Trip cost estimator by destination and duration

Gas Cost

Road trip fuel cost from distance and MPG

Drive Time

Trip duration from distance and average speed

Hotel Points

Points vs cash value comparison

Mile Value

Flight miles value by redemption option

Split Calculator

Group expense divider for shared costs

Jet Lag

Recovery time estimator from time zones crossed

Sunrise/Sunset

Day length and sun times by location and date

Hourly to Salary

Annual salary and hourly rate converter

Freelance Rate

Rate calculator from desired income and expenses

Meeting Cost

Meeting expense from attendees, salaries, and duration

Email ROI

Email campaign calculator from open and conversion rates

Customer Lifetime Value

CLV from average purchase, frequency, and lifespan

Churn Rate

Customer loss rate over a time period

Burn Rate

Runway calculator from monthly spend and cash

SaaS Metrics

MRR, ARR, and other SaaS revenue metrics

A/B Test

Statistical significance for A/B test variants

Conversion Rate

Conversion rate from visitors and conversions

CPC/CPM

Ad cost calculator from clicks, impressions, and spend

ROAS

Return on ad spend from revenue and ad cost

Contractor vs Employee Cost

Annual employer cost comparison for W-2 vs contractor hiring

GPA Calculator

Grade point average from grades and credit hours

Grade Needed

Final exam score needed for desired course grade

Weighted Grade

Grade with category weighting

Test Score

Percentage score from correct and total questions

Reading Time

Time to read from word count and reading speed

Study Time

Time allocation across subjects

Scholarship

Award value calculator by tuition and terms

Student Loan Payment

Monthly payment by loan amount, rate, and term

College Cost

4-year cost projector with inflation

DnD Dice

Dice roller with statistics for tabletop RPGs

Probability

Game odds from favorable and total outcomes

Card Odds

Deck probability for desired draws

Board Game Timer

Turn timer by number of players

Miniature Scale

Scale converter for model building

Knitting Gauge

Yarn calculator from gauge and dimensions

Cross Stitch

Thread and fabric calculator for pattern size

Photography

Exposure calculator for ISO, aperture, and shutter

Music BPM

Tempo calculator from beats and time

Craft Pricing

Handmade item pricing from materials and time

Sports Statistics

Sport-specific stat calculators

Carbon Footprint

CO2 calculator from activities and consumption

Electricity Emissions

Grid emissions by kWh and location

Flight Emissions

Travel carbon footprint by route and class

Driving Emissions

Vehicle CO2 by distance and vehicle type

Water Footprint

Water usage calculator by activity

Recycling Impact

Environmental savings from materials recycled

Solar ROI

Solar system payback from cost and production

Tree Carbon

Carbon offset by tree type and quantity

Home Energy Audit

Efficiency calculator from home details and usage

Dog Food

Daily food amount by weight, age, and activity

Cat Food

Feeding calculator by weight, age, and food type

Pet Age

Human years converter by pet age and species

Aquarium Size

Tank volume from dimensions

Fish Stocking

Fish per gallon by tank size and species

Pet Medication

Dosage calculator by pet weight and medication

Pet Cost

Annual expense estimate by pet type and care level

Gear Ratio

Mechanical advantage from teeth counts

Torque

Torque from force and lever arm distance

Pulley System

Mechanical advantage from pulley configuration

Spring Constant

Hooke's law from force and displacement

Thermal Expansion

Length change from material and temperature

Heat Transfer

Q = mcDT heat energy calculator

Pressure

Pressure from force and area

Flow Rate

Volume flow from pipe diameter and velocity

Reynolds Number

Flow regime from velocity, diameter, and viscosity

Structural Load

Distributed load analysis for beams

Moment of Inertia

Cross-section properties for structural shapes

Stress/Strain

Material properties from force, area, and modulus