TheCalculatorHive™

Math Calculators

5 tools

Percentages, fractions, geometry, algebra and number tools.

Percentages

PercentageWork out what is X% of Y, what percent one number is of another, and the percentage increase or decrease between two values.Absence %Calculate absence rate and attendance percentage from days (or hours) absent and total scheduled days — the standard HR and school absenteeism formula.

Arithmetic

FractionAdd, subtract, multiply and divide fractions and get the answer in lowest terms, as a mixed number and as a decimal, with the working shown.

Number systems

Roman NumeralConvert numbers to Roman numerals and Roman numerals to numbers (1–3999), with a place-value breakdown, reference chart and validation.

Geometry

Hemisphere AreaFind the curved (lateral), base and total surface area of a hemisphere from its radius, with the worked formula shown step by step.