Percentage Calculator
Calculate percentages, percentage change and percentage of totals.
Quick Formulas
X% of Y = (X ÷ 100) × YX of Y as % = (X ÷ Y) × 100% change = ((new − old) ÷ |old|) × 100New = old × (1 ± %÷100)
PercentageMathFinanceStatisticsEducation
Four-mode percentage calculator: find X% of Y, find what % X is of Y, calculate percentage change, and compute increase or decrease from a base.
Key Features
X% of Y
Classic percentage: what is 15% of 200? Answer: 30.
X is What % of Y
Find the percentage: 45 is what percent of 180? Answer: 25%.
Percentage Change
From 80 to 100 is a +25% change. Handles both increase and decrease.
Increase / Decrease
What is 200 increased by 15%? Or decreased by 15%? Gives the new value directly.
How to Use
- 1Select the calculation mode using the tab selector.
- 2Fill in the two input values.
- 3The result appears instantly and can be copied with one click.