Percentage Calculator
Calculate percentages step by step — three common modes in one tool.
About this calculator
This calculator handles basic percentage operations. For compound interest, tax calculations, or percentage of percentage, enter the values manually. Results are rounded to 2 decimal places.
How percentage calculations work
To find X% of Y, divide X by 100 and multiply by Y. To find what percentage X is of Y, divide X by Y and multiply by 100. For percentage change, subtract the old value from the new, divide by the absolute old value, and multiply by 100. A positive result means an increase; negative means a decrease.