Math calculators
Math Calculators
Pick the calculator that matches the operation: quick arithmetic, scientific functions, graphing, percentages, fractions, ratios, unit conversion, tips, averages, rounding, statistics or triangle formulas.
Math calculators are designed to run in your browser where practical, so results appear quickly and do not require an account.
Start with the job
Use the first group for the questions people usually need fastest, then move to the grouped list for more specific formulas.
Run quick arithmetic
Use a simple online calculator for everyday addition, subtraction, multiplication, division, percentages and quick arithmetic.
Use Basic CalculatorEvaluate scientific expressions
Use a safe scientific calculator for arithmetic, percentages, square roots, powers, logarithms, trigonometry, degrees and radians.
Use Scientific CalculatorSolve percent-of questions
Calculate what X percent of Y is, what percent one number is of another, or the whole amount from a percentage.
Use Percentage CalculatorConvert common measurement units
Convert common length, weight, temperature, area, volume, speed and time units with a focused measurement converter.
Use Unit ConverterSummarize a list of numbers
Calculate average, count, sum, median, minimum and maximum from numbers separated by commas, spaces or new lines.
Use Average CalculatorFind a right-triangle side
Find a missing side of a right triangle using a² + b² = c².
Use Pythagorean TheoremGuides and methodology
Use the chooser guide when the same question could fit more than one calculator. The support notes cover shared methodology and browser-side behaviour.
All math calculators (17)
A grouped list of arithmetic, conversion, scientific, statistics and geometry calculators, ordered by the jobs people usually need first.
Everyday number checks
Handle arithmetic, tips, rounding, percent questions, percent change and random picks.
Basic Calculator
Run quick arithmetic
Use a simple online calculator for everyday addition, subtraction, multiplication, division, percentages and quick arithmetic.
Use Basic CalculatorPercentage Calculator
Solve percent-of questions
Calculate what X percent of Y is, what percent one number is of another, or the whole amount from a percentage.
Use Percentage CalculatorPercentage Change Calculator
Compare start and end values
Compare a starting value and ending value to estimate percentage increase or decrease and the absolute difference.
Use Percentage ChangeTip Calculator
Split a tip and total
Estimate tip amount, total with tip, tip per person and total per person from a bill amount and tip percentage.
Use Tip CalculatorRounding Calculator
Round a number cleanly
Round a number to selected decimal places using nearest, up or down rounding modes.
Use Rounding CalculatorRandom Number Generator
Pick random numbers in a range
Generate one or more random integers or decimals within a selected range, with optional duplicate control.
Use Random Number GeneratorUnits, fractions and ratios
Convert measurements, combine fractions or scale a ratio without switching tools.
Unit Converter
Convert common measurement units
Convert common length, weight, temperature, area, volume, speed and time units with a focused measurement converter.
Use Unit ConverterFraction Calculator
Add, subtract or simplify fractions
Add, subtract, multiply, divide and simplify fractions, with decimal and mixed-number results.
Use Fraction CalculatorRatio Calculator
Simplify or scale a ratio
Simplify ratios, find equivalent ratios and scale ratio values from clear user-entered numbers.
Use Ratio CalculatorScientific and graphing
Use scientific functions, plot one function or calculate powers and roots.
Scientific Calculator
Evaluate scientific expressions
Use a safe scientific calculator for arithmetic, percentages, square roots, powers, logarithms, trigonometry, degrees and radians.
Use Scientific CalculatorGraphing Calculator
Plot one function
Plot simple functions such as y = x^2, y = sin(x) and y = 2x + 3 on a clean x-y grid.
Use Graphing CalculatorSquare Root Calculator
Calculate a square root
Calculate the square root of a non-negative number and see a squared check of the result.
Use Square RootExponent Calculator
Raise a number to a power
Raise a base number to a power, including common positive, negative and fractional exponents when the result is safe to show.
Use Exponent CalculatorLists and geometry
Summarize number lists or use formula-specific triangle calculators.
Average Calculator
Summarize a list of numbers
Calculate average, count, sum, median, minimum and maximum from numbers separated by commas, spaces or new lines.
Use Average CalculatorStandard Deviation Calculator
Measure spread in a number list
Calculate mean, variance, sample standard deviation and population standard deviation from a pasted list of numbers.
Use Standard DeviationPythagorean Theorem Calculator
Find a right-triangle side
Find a missing side of a right triangle using a² + b² = c².
Use Pythagorean TheoremTriangle Calculator
Calculate triangle area and angles
Calculate area, perimeter and angles from three side lengths using Heron's formula and the law of cosines.
Use Triangle CalculatorHow these math calculators work
Each calculator is scoped to one kind of number task. Basic handles everyday arithmetic, percentage tools keep common percent questions separate, list calculators summarize pasted numbers, and geometry calculators use the formula that matches the shape.
What these calculators do not include
The math category does not solve equations symbolically, convert currencies, check homework policies or replace specialist math, statistics or graphing software. Graphing stays focused on one real-valued function.
FAQs
Which math calculator should I start with?
Start with the operation: Basic Calculator for arithmetic, Scientific Calculator for functions, Percentage or Percentage Change for percent questions, Unit Converter for measurements, Average or Standard Deviation for number lists, and geometry tools for triangles.
When should I use Basic instead of Scientific?
Use Basic Calculator for arithmetic, quick percentages and calculator-button work. Use Scientific Calculator when the expression needs trig, logs, constants, powers, roots or grouped parentheses.
Which calculator should I use for percentages?
Use Percentage Calculator for percent-of, value-from-percent and percent-of-whole questions. Use Percentage Change Calculator when you have a starting value and an ending value.
Which calculators cover lists, statistics and geometry?
Use Average Calculator for mean, median, min and max. Use Standard Deviation for variance and spread. Use Pythagorean Theorem for one missing side of a right triangle, or Triangle Calculator for area, perimeter and angles from three sides.
Do the math calculators store my numbers?
They are designed to run in the browser where practical and do not require an account.
Can the unit converter convert currency?
No. The Unit Converter handles common measurement units only. It does not provide currency or exchange-rate conversion.
Do these tools solve algebra symbolically?
No. The math hub focuses on calculator-style arithmetic, functions, conversions, statistics and geometry formulas rather than symbolic algebra or full graphing software.