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Math & Science.

Primes, averages, geometry and number bases. Edit this landing page in Elementor anytime. The grid is a Toolory widget locked to this category.

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★ 4.7

Everyday Calculator

A clean four-function calculator with percent and memory-free history.

Math & Science 19,326 uses
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★ 4.2

GCD & LCM

Greatest common divisor and least common multiple of two integers.

Math & Science 44,886 uses
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★ 4.8

Prime Number Checker

Test primality and list factors.

Math & Science 11,006 uses
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★ 4.4

Factorial Calculator

n! for integers up to a safe limit.

Math & Science 46,948 uses
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★ 4.9

Average Calculator

Mean, median and range from a list of numbers.

Math & Science 7,461 uses
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★ 4.5

Standard Deviation

Sample and population standard deviation.

Math & Science 7,761 uses
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★ 4.9

Roman Numeral Converter

Arabic ↔ Roman for numbers 1–3999.

Math & Science 35,138 uses
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★ 4.5

Quadratic Equation Solver

Roots of ax² + bx + c = 0, including complex pairs.

Math & Science 25,385 uses
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★ 3.8

Rule of Three

If a relates to b, what relates to c?

Math & Science 47,544 uses
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★ 4.3

Random Number Generator

Integers in a range, with optional unique draws.

Math & Science 5,258 uses
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★ 4.0

Triangle Area

Area from base and height, or Heron's formula.

Math & Science 47,378 uses
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★ 4.3

Circle Calculator

Circumference and area from radius or diameter.

Math & Science 43,715 uses
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★ 4.6

Pythagorean Theorem

Find the missing side of a right triangle.

Math & Science 30,345 uses
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★ 4.3

X is what % of Y

A focused percentage-of calculator.

Math & Science 9,821 uses