Calculator
Percentage Calculator
Choose a calculation mode below and enter your values. Press Enter to calculate.
What is X% of Y?
About this calculator
CalcKit's percentage calculator covers the three most common percentage problems in one clean interface. Use Basic % mode to find what a given percentage of any number is — for example, what is 18% of 4,500? Switch to Increase / Decrease mode to calculate the percentage change between two values, useful for tracking price changes, exam score improvements, or sales growth. The % Difference mode computes the relative difference between two numbers symmetrically, which is the standard formula used in scientific comparisons. Each result is accompanied by the plain-English formula so you can understand exactly how the answer was reached — ideal for students learning percentage concepts for the first time. Press Enter in any input field to calculate instantly without reaching for the mouse.