Fraction Calculator

Calculate percentages easily — find X% of a number, percentage change, increase and decrease. Four calculators in one tool.

Add, subtract, multiply and divide mixed numbers and fractions. Convert between mixed numbers, improper fractions and decimals with step-by-step working

Calculate logarithms in any base with presets for log10, natural log and log2 plus antilog and change of base formula

Calculate volume in cubic feet from length, width and height. Supports feet, inches, cm, metres and yards with conversions to litres, gallons and more