Enter a starting value and an ending value to calculate the percentage change. A positive result means an increase; negative means a decrease. The formula and absolute change are shown.
All calculations use standard percentage arithmetic: (X / 100) × Y for “X% of Y”, (X / Y) × 100 for “X is what % of Y”, and ((new − original) / |original|) × 100 for percentage change. The formula used is always shown below the result.
All calculations happen in your browser. Our servers are not involved at any point.
For working out fractions of a value, try the fraction calculator. To split a bill including a tip, use the tip calculator. For modelling savings growth over time, see the compound interest calculator.