Math & Converters

Math & Converter Calculators

13 free tools for percentage, unit conversion and numerical calculations.

Percentage Calculator

Percentage increase, decrease and ratio calculations

Standard deviation and variance of a data set

Calculator for basic arithmetic operations

Trigonometry, logarithm and exponent calculations

Statistical central tendency measures

Calculate room and area in square meters

Convert between kg, pounds, ounces, grams and tonnes

Convert meters, miles, inches, feet, yards, km

Dimensional weight for shipping and cargo

Convert numbers to Roman numerals

Generate random numbers for draws and games

Password security strength and combination count

Digital coin toss simulator