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Math Tools
Solve fractions, ratios, primes, quadratics and statistics problems. Each calculator shows the method so you can follow the working, not just the answer.
49–68 of 68 tools
Browse categories →Range of Numbers Calculator
Calculate minimum, maximum and range from a list of numbers.
Ratio as Percentage Calculator
Express the first value as a percentage of the second.
Ratio Calculator
Solve a ratio or proportion a : b = c : d by leaving one value blank.
Ratio Simplifier
Reduce a two-part ratio to its simplest integer form.
Ratio Simplifier Advanced
Ratio Simplifier Advanced for practical everyday workflows. Enter the requested values to get a clear result.
Rectangle Area Calculator
Rectangle Area Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers.
Root Mean Square Calculator
Root Mean Square Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Sample Standard Deviation Calculator
Sample Standard Deviation Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Sample Variance Calculator
Sample Variance Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Scientific Notation Calculator
Convert numbers to and from scientific, engineering and standard decimal notation.
Slope Calculator
Slope Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Speed Distance Time Calculator
Solve for speed, distance or time from the other two values.
Sphere Volume Calculator
Sphere Volume Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Square Root Calculator
Find the square root of any number, including the simplified radical form.
Standard Error Calculator
Standard Error Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Trapezoid Area Calculator
Trapezoid Area Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Triangle Area Calculator
Triangle Area Calculator for practical everyday workflows. Enter the requested values to get a clear result.
Weighted Average Score Calculator
Calculate a weighted average from two values and their weights.
Z-Score Estimator
Calculate a z-score from an observation, mean and standard deviation.