Math and Statistics calculators cover the numbers you meet in school, work, and research — averages and percentages, square roots, standard deviation and normal distributions, number-base conversions, and more. Frequently used tools include the Average Calculator, Percentage Deviation Calculator, Square Root Calculator, Normal Distribution Calculator, and 2's Complement Calculator.
Pick a tool below to get an instant answer, or open the Trending tab to see what other people are calculating this week. Everything is free and works on any device.
- Fraction Calculator
- Matrix Calculator
- Slope Calculator
- Algebra Calculator
- Trigonometry Calculator
- Percentage Calculator
- Probability Calculator
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Definite Integral CalculatorCompute the definite integral of common functions over [a,b] using Simpson rule numerical integration. Choose f(x), set limits, get the signed area.
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3D Line Equation From Two Points CalculatorFind the parametric and symmetric equation of a line in 3D from two points. Get the direction vector, components, and distance instantly.
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Death Rate CalculatorCalculate the crude death rate (mortality rate) per 1,000, 10,000 or 100,000 people from the number of deaths and total population.
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Sample Standard Deviation CalculatorFree sample standard deviation calculator using the n-1 (Bessel) formula. Get standard deviation, variance, mean and sum of squared deviations instantly.
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Population Standard Deviation CalculatorCalculate population standard deviation (sigma), variance, mean, and sum from your data set instantly. Free step-by-step statistics calculator.
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Binomial Probability CalculatorCalculate binomial probability P(X=k) with the formula C(n,k)·pᵏ·(1−p)^(n−k). Get exact, cumulative probabilities, mean and standard deviation.
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Is-Of Percentage Proportion CalculatorSolve the percentage proportion is/of = %/100 for any missing value. Enter any two of is, of, or percent and get the third instantly.
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Present & Future Value Algebra CalculatorSolve for present value or future value using FV = PV(1+r)ⁿ. Enter amount, rate per period, and number of periods to get instant results.
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Square Root of a Negative Number CalculatorSimplify the square root of a negative number into i·√n form. Enter any number to get the imaginary coefficient instantly with steps.
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Solve for Missing Value to Reach a Target AverageFind the missing value(s) you need to hit a target average. Enter your known numbers, total count, and goal average to solve instantly.
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Scale Factor Calculator for Similar FiguresFind the scale factor between similar figures, or solve for a missing dimension. Uses k = new ÷ original and new = k × original with area factor k².
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Three Numbers in a Ratio CalculatorSplit a total into three parts using a ratio a:b:c. Free share splitter that divides any amount proportionally with a worked example and formula.
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Expanded Form of a Number CalculatorConvert any whole number into expanded form using place value. Instantly see each digit multiplied by its power of ten and the full sum.
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De Moivre Theorem CalculatorRaise any complex number a + bi to a power n using De Moivre theorem. Get the polar and rectangular form, modulus, and argument instantly.
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Factor Difference of Cubes CalculatorFactor a difference of cubes a³−b³ into (a−b)(a²+ab+b²). Enter a and b to get the factored form, each term, and the numeric value instantly.
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Dividing Scientific Notation CalculatorDivide two numbers written in scientific notation instantly. Enter coefficients and exponents to get the quotient in normalized scientific notation and decimal form.
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Sum of First n Odd Numbers CalculatorFind the sum of the first n odd numbers instantly. Uses the famous identity 1+3+5+...+(2n−1) = n². Enter n and get the result with steps.
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Logarithm Base Conversion CalculatorEvaluate logₐ(b) for any base instantly. Uses the change-of-base formula logₐ(b) = ln(b)/ln(a) to compute logarithms in any base accurately.
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Pythagorean Triple Generator CalculatorGenerate Pythagorean triples (a, b, c) from two integers m and n using Euclid formula: a=m²−n², b=2mn, c=m²+n². Free, instant, exact.
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Sum of First n Even Numbers CalculatorFind the sum of the first n even numbers (2 + 4 + 6 + ...) instantly using the closed-form formula n(n+1). Free, fast, and accurate.
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Solve Compound Interest for Rate or TimeSolve the compound interest formula for the unknown interest rate or time. Enter principal, future amount and compounding frequency to find r or t.
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Straight-Line Depreciation CalculatorCalculate straight-line (linear) depreciation: annual expense, accumulated depreciation, and book value of an asset after any number of years.
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Simplify a Ratio to Lowest Terms CalculatorReduce any ratio a:b to its simplest form. Enter two numbers and instantly get the lowest-terms ratio plus the greatest common divisor (GCD).
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Quadratic Function Analyzer CalculatorAnalyze any quadratic ax²+bx+c: find the vertex, axis of symmetry, real roots, discriminant, and y-intercept instantly with steps.
Frequently asked questions
What can I calculate with these math and statistics tools?
Everyday and academic math: means, medians and other averages, percentages and percent change, powers and roots, standard deviation and variance, probability and distributions, and base conversions such as binary or two's complement.
Do the calculators show the steps or formula?
Most show the formula and the worked result so you can follow the method, not just the final number — useful for checking homework or understanding the calculation.
Are they free and do they work on mobile?
Yes to both — free, no sign-up, and fully responsive on phones and tablets.
How accurate are the results?
They use standard mathematical formulas and are tested against known values. For high-precision or academic work, verify rounding and significant figures against your own requirements.
Which math calculators are most popular?
The list is ordered by how often each tool is used, so the most popular appear first. The Trending, Recently added, and Last updated tabs highlight what's new and rising.
