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Math Calculators

Free online math calculators for scientific, fraction, percentage, geometry, algebra, statistics, and more. Solve complex math problems instantly.

Last updated: October 2026 By CalcOrigin Editorial Team

Scientific Calculator Fraction Calculator Percentage Calculator Triangle Calculator Volume Calculator Standard Deviation Calculator Random Number Generator Number Sequence Calculator Percent Error Calculator Exponent Calculator Binary Calculator Hex Calculator Half-Life Calculator Quadratic Formula Calculator Slope Calculator Log Calculator Area Calculator Sample Size Calculator Probability Calculator Statistics Calculator Permutation and Combination Calculator Z-score Calculator Confidence Interval Calculator Ratio Calculator Distance Calculator Circle Calculator Surface Area Calculator Pythagorean Theorem Calculator Right Triangle Calculator Root Calculator Least Common Multiple Calculator Greatest Common Factor Calculator Factor Calculator Rounding Calculator Matrix Calculator Scientific Notation Calculator Big Number Calculator Prime Factorization Calculator Basic Calculator Long Division Calculator Average Calculator P-value Calculator GPA Calculator Grade Calculator Dice Roller Conversion Calculator Weight Calculator

About Our Math Calculators

From a basic four-function calculator to scientific notation, statistics, and geometry, this collection covers the math you need for school, work, and everyday problem-solving. Every tool is free, runs instantly in your browser, and presents results clearly.

Most math questions reduce to one of a few tasks: evaluating an expression, solving for an unknown, converting between forms, or summarizing data. The calculators above are grouped by those tasks so you can jump straight to the right tool.

What You Can Calculate

Arithmetic and conversions — fractions, percentages, exponents, and number bases. Try the fraction calculator or the percentage calculator.
Algebra — quadratic equations, slopes, roots, and logarithms. Use the quadratic formula calculator.
Geometry — area, volume, surface area, and triangles. Start with the area calculator.
Statistics — mean, median, mode, standard deviation, probability, and z-scores. Try the standard deviation calculator.
Number theory — factors, greatest common factor, least common multiple, and prime factorization. Use the factor calculator.

How to Choose the Right Tool

Identify what you already know and what you are solving for. If you have a set of numbers and need a summary, a statistics tool is the fit. If you have an equation with an unknown, choose an algebra calculator. For measurements and shapes, geometry calculators handle the details.

Most pages also include the underlying formula, so you can verify a result or reproduce it by hand — useful when you are learning or checking homework.

Frequently Asked Questions

Are these math calculators free?

Yes. All math calculators on CalcOrigin are free and run in your browser with no account required.

Do the calculators show the formula?

Most pages explain the formula behind the result so you can understand the method and check the work yourself.

Can I use these for homework?

They are a useful way to check answers and explore how changing an input affects the result. For graded work, follow your course's rules on tool use.

Which math calculator should I use for statistics?

Use the standard deviation, statistics, or mean-median-mode-range calculators depending on whether you need a single summary value or a full set of descriptive statistics.