Math and Science Calculators

Math and Science

Free calculators for percentages, algebra, statistics, geometry, linear algebra, physics and chemistry. Each one shows the method, so you can check the working, not just the answer.

85 toolsShows the method100% free

Percentages

8 tools

The most-searched everyday math, from percent off to percent change.

Percentage CalculatorPercent of, is-what-percent and change Percent Off CalculatorSale price after a discount Percentage IncreaseThe percent change between two numbers Fraction to PercentTurn a fraction into a percentage Percent to FractionTurn a percentage into a fraction Percent Error CalculatorMeasured value vs the true value Proportion CalculatorSolve a/b = c/d for the unknown Percentage Difference CalculatorDifference of two values by average

Roots and Number Theory

11 tools

Roots, factors and multiples for algebra and homework.

Square Root CalculatorThe square root of any number Cube Root CalculatorThe cube root of any number Nth Root CalculatorAny root of any number GCD CalculatorGreatest common divisor of numbers LCM CalculatorLeast common multiple of numbers Ratio CalculatorSimplify and solve ratios Fraction CalculatorAdd, subtract, multiply, divide fractions Prime Factorization CalculatorPrime factors and divisor count Factorial Calculatorn! exact, digits and trailing zeros Modulo CalculatorRemainder of a divided by b Combination and Permutation CalculatornCr and nPr, choose r from n

Algebra and Equations

7 tools

Solve equations and work with powers.

AP Calculus BC ScoreEstimate your AP exam score Quadratic Equation CalculatorRoots, discriminant and vertex Exponent CalculatorPowers, negative and fractional Logarithm CalculatorLog to any base, ln and log10 Sequence CalculatorArithmetic and geometric terms Cubic Equation SolverRoots of a cubic, real or complex Binomial Expansion CalculatorExpand a binomial by the theorem

Arithmetic and Numbers

3 tools

Rounding and number formats.

Scientific Notation CalculatorScientific, E and engineering form Rounding CalculatorRound to any place, five methods Significant Figures CalculatorRound to key digits, sig figs

Statistics and Probability

11 tools

Summarise a data set or work out the odds.

Standard DeviationMean, variance and standard deviation Five Number SummaryMin, quartiles, median and max Dice ProbabilityOdds for any dice roll Grade CalculatorWeighted grade from your scores Percentile CalculatorAny percentile of a data set Sample Size CalculatorSurvey sample size and margin Z-Score CalculatorStandard score and percentile Linear Regression CalculatorBest-fit line, slope and r-squared Correlation CalculatorPearson r and covariance Weighted Average CalculatorWeighted mean by importance Hypergeometric CalculatorCard draw odds for TCG decks

Geometry and Coordinates

11 tools

Coordinate geometry and right triangles.

DPI CalculatorScreen pixel density (PPI)Midpoint CalculatorThe point halfway between two points Endpoint CalculatorFind a missing endpoint Aspect Ratio CalculatorSimplify a width and height to a ratio Land Area CalculatorPlot area in acres, hectares and sq m Pythagorean Theorem CalculatorMissing side of a right triangle Slope CalculatorSlope, intercept and line equation Distance CalculatorStraight-line distance between points Triangle Area CalculatorBase-height, Heron or side-angle Circle CalculatorArea, circumference, radius, diameter Volume CalculatorSphere, cube, box, cylinder, cone

Linear Algebra and Vectors

7 tools

Matrices and vectors.

Determinant Calculator2x2 and 3x3, invertibility Matrix Multiplication CalculatorMultiply two square matrices Vector Magnitude CalculatorLength of a vector, any dimension Matrix Addition CalculatorAdd or subtract two matrices Inverse Matrix Calculator2x2 and 3x3 inverse Dot Product CalculatorDot product and angle of vectors Cross Product CalculatorPerpendicular vector of two 3D vectors

Physics and Science

24 tools

Applied science and exam tools.

Elastic Potential Energy CalculatorSpring energy PE = 0.5 k x squared Coulombs Law CalculatorElectric force F = k q1 q2 / r squared Efficiency CalculatorOutput over input as a percentage Gravitational Force CalculatorNewton F = G m1 m2 / r squared Hookes Law CalculatorSpring force F = k x Heat Energy CalculatorHeat energy Q = m c dT Pressure CalculatorSolve P = F / A for any value Torque CalculatorTurning effect T = F r sin(angle)Frequency and Wavelength CalculatorConvert wave speed, frequency, wavelength Velocity CalculatorSolve v = d / t for any value Acceleration CalculatorSolve a = change in v over time Potential Energy CalculatorGravitational PE = m g h 0-60 mph AccelerationAcceleration from a 0-60 time Capacitance CalculatorCapacitance for a circuit Angular Velocity ConverterConvert angular velocity units Resistance CalculatorOhm law voltage, current, resistance Density CalculatorDensity, mass and volume Force CalculatorForce, mass and acceleration (F=ma)Kinetic Energy CalculatorEnergy of a moving object Momentum CalculatorMomentum from mass and velocity Work CalculatorWork from force and distance Power CalculatorPower from work over time Electricity Cost CalculatorkWh usage and appliance costs Ohm's Law CalculatorVoltage, current, resistance, power

Chemistry and Science

6 tools

Gas laws, solution concentration and radioactive decay.

pH CalculatorAcidity from ion concentration Moles CalculatorAmount from mass and molar mass Dilution CalculatorSolve C1 V1 = C2 V2 Ideal Gas Law CalculatorSolve PV = nRT for any value Molarity CalculatorSolution concentration M = n / V Half Life CalculatorExponential radioactive decay

Math you can check, not just copy

The most useful math tool is one that shows its working. Every calculator here returns the answer and, where it helps, the method behind it, so you can learn the step rather than just paste the result. That makes this hub as handy for homework and revision as it is for a quick real-world sum.

Start with the everyday math

Percentages are the calculations people reach for most, so the percentage calculator is a good first stop for discounts, changes and shares. For algebra and homework, the roots and number-theory tools cover square roots, factors and multiples, while the statistics section turns a list of numbers into a clean summary.

Accurate and private

Each tool uses standard mathematical definitions, so results are precise. Everything runs in your browser and nothing you enter is stored.

Frequently asked questions

Do these calculators show the steps?

Many do. Tools like the percentage and statistics calculators display the method or formula alongside the answer, which is useful for learning and for checking your own working.

Are they suitable for school and college homework?

Yes. They cover common school and early-college topics such as percentages, roots, factors, standard deviation and coordinate geometry, and they show enough working to help you understand the result.

How accurate are the results?

They use standard mathematical definitions and full-precision arithmetic, rounding only the display. For most purposes the answers are exact.

Is any of this stored or shared?

No. The math runs entirely in your browser, so the numbers you enter are never saved or sent anywhere.

Reviewed by Prof. Dr. Khalil Mudassar, PhD
Formulas and conversion factors on this page are checked for accuracy against standard references. View profile

These calculators are provided for education and general use. Results are based on standard mathematical definitions and the values you enter. For graded or published work, always verify the method and result yourself.

Percentages

Roots and Number Theory

Algebra and Equations

Arithmetic and Numbers

Statistics and Probability

Geometry and Coordinates

Linear Algebra and Vectors

Physics and Science

Chemistry and Science

Math you can check, not just copy

Start with the everyday math

Accurate and private

Frequently asked questions

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