Digital Drive HQ
Math

Free Math Calculators

Percentages, exponents, roots, geometry, statistics, and algebra — free math calculators and solvers.

37
free tools
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Percent Error Calculator

Compare a measured value to the true value.

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Exponent Calculator

Raise any base to any power.

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Root Calculator

Find the square, cube, or any nth root.

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Log Calculator

Compute a logarithm of any base.

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Half-Life Calculator

Calculate remaining quantity after decay.

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Pythagorean Theorem Calculator

Find the hypotenuse of a right triangle.

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Right Triangle Calculator

Solve a right triangle from its two legs.

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Slope Calculator

Find the slope between two points.

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Distance Calculator

Find the distance between two points.

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Circle Calculator

Find a circle's area, circumference, and diameter.

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Area Calculator

Calculate the area of common shapes.

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Volume Calculator

Calculate the volume of 3D shapes.

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Surface Area Calculator

Calculate the surface area of 3D shapes.

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Z-Score Calculator

Find how many standard deviations from the mean.

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Confidence Interval Calculator

Find a confidence interval for a mean.

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Sample Size Calculator

Find the survey sample size you need.

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Probability Calculator

Combine the probabilities of two events.

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Permutation and Combination Calculator

Compute permutations (nPr) and combinations (nCr).

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Quadratic Formula Calculator

Solve any quadratic equation.

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Scientific Notation Calculator

Convert a number to scientific notation.

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Rounding Calculator

Round a number to any number of places.

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GCF Calculator

Find the greatest common factor.

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LCM Calculator

Find the least common multiple.

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Factor Calculator

List all factors and prime factorization.

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Number Sequence Calculator

Find the nth term and sum of a sequence.

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Standard Deviation Calculator

Find the standard deviation of a data set.

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Statistics Calculator

Get full summary statistics for a data set.

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Mean, Median, Mode, Range Calculator

Find the mean, median, mode, and range.

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Triangle Calculator

Solve a triangle from its three sides.

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Matrix Calculator

Find the determinant of a 2×2 or 3×3 matrix.

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Binary Calculator

Do arithmetic in binary and convert to decimal.

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Hex Calculator

Do arithmetic in hexadecimal.

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Big Number Calculator

Exact arithmetic on very large integers.

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Basic Calculator

A simple online calculator.

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Long Division Calculator

Divide with a step-by-step worked solution.

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Prime Factorization Calculator

Break a number into its prime factors.

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P-value Calculator

Find the p-value from a test statistic.

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About

Math Calculators

Free math calculators for algebra, geometry, and statistics — percent error, exponents and roots, logarithms, the quadratic formula, GCF and LCM, factors and prime factorization, number sequences, permutations and combinations, area, volume and surface area, circle, distance, slope, the Pythagorean theorem and right triangles, plus z-score, confidence intervals, sample size, and probability. Each shows the answer instantly with the formula behind it — all in your browser.

Frequently asked questions

Are these math calculators free?

Yes — every calculator is free with your account and runs in your browser. Each shows the formula so you can check the work.

Do they show the steps?

They show the result and the key formula (and the discriminant, prime factorization, and so on where relevant), so you understand how the answer is derived.

Can I use them for homework?

Absolutely — they're built for students and anyone who needs a quick, accurate answer to a common math problem.

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