Maths & science
Explore numbers, solve equations and check your working.
Percentage Calculator
Tool: Maths & scienceCalculate a percentage of a value, a percentage change, or the original before a percentage increase.
Coordinate Format Converter
Tool: Maths & scienceConvert latitude and longitude between decimal degrees and degrees/minutes/seconds.
Descriptive Statistics Calculator
Tool: Maths & scienceCalculate mean, median, modes, quartiles, range and standard deviation for a numeric sample.
Fraction Calculator
Tool: Maths & scienceAdd, subtract, multiply or divide fractions exactly and simplify the result.
Integer Factors, GCD and LCM
Tool: Maths & sciencePrime-factor integers and find their greatest common divisor and least common multiple.
Matrix Calculator
Tool: Maths & scienceAdd or multiply matrices, or calculate a transpose, determinant or inverse.
Ohm's Law Calculator
Tool: Maths & scienceCalculate voltage, current, resistance and power from two known electrical quantities.
Percentage difference calculator
Tool: Maths & scienceCompare two non-negative values using their average, with the absolute difference and formula shown.
Probability Distribution Calculator
Tool: Maths & scienceCalculate normal cumulative probabilities or binomial point and cumulative probabilities.
Quadratic Equation Calculator
Tool: Maths & scienceFind real or complex roots of ax squared plus bx plus c equals zero.
Random number generator
Tool: Maths & scienceGenerate random whole numbers between inclusive limits, with no-repeat and sorting options and a CSV download.
Ratio and Proportion Calculator
Tool: Maths & scienceReduce a ratio and solve the missing value in an equivalent proportion.
Roman numeral converter
Tool: Maths & scienceConvert whole numbers to Roman numerals or check and decode standard Roman numeral notation.
Scientific Calculator
Tool: Maths & scienceCalculate a mathematical expression with functions, constants and explicit operator precedence.
Significant Figures Calculator
Tool: Maths & scienceCount significant figures and round a decimal value to a chosen precision.
Percentage Calculator
Calculate a percentage of a value, a percentage change, or the original before a percentage increase.
Coordinate Format Converter
Convert latitude and longitude between decimal degrees and degrees/minutes/seconds.
Descriptive Statistics Calculator
Calculate mean, median, modes, quartiles, range and standard deviation for a numeric sample.
Fraction Calculator
Add, subtract, multiply or divide fractions exactly and simplify the result.
Integer Factors, GCD and LCM
Prime-factor integers and find their greatest common divisor and least common multiple.
Matrix Calculator
Add or multiply matrices, or calculate a transpose, determinant or inverse.
Ohm's Law Calculator
Calculate voltage, current, resistance and power from two known electrical quantities.
Percentage difference calculator
Compare two non-negative values using their average, with the absolute difference and formula shown.
Probability Distribution Calculator
Calculate normal cumulative probabilities or binomial point and cumulative probabilities.
Quadratic Equation Calculator
Find real or complex roots of ax squared plus bx plus c equals zero.
Random number generator
Generate random whole numbers between inclusive limits, with no-repeat and sorting options and a CSV download.
Ratio and Proportion Calculator
Reduce a ratio and solve the missing value in an equivalent proportion.
Roman numeral converter
Convert whole numbers to Roman numerals or check and decode standard Roman numeral notation.
Scientific Calculator
Calculate a mathematical expression with functions, constants and explicit operator precedence.
Significant Figures Calculator
Count significant figures and round a decimal value to a chosen precision.