Percentage Calculator
Calculate percentages with 4 different modes online
What is a Percentage Calculator?
A percentage calculator is an online tool for quickly solving various percentage problems. Whether you need to find X% of Y, calculate the percentage relationship between two numbers, or determine percentage increase/decrease, it delivers instant results.
How to Use?
Select the calculation mode, enter the values, and see the result in real-time. Supports 4 modes: find X% of Y, what percent X is of Y, percentage change from A to B, and reverse percentage (X is Y% of what?). All calculations are done locally in your browser.
FAQ
How to calculate percentages?
Percentage formulas: X% of Y = X÷100×Y; X is what % of Y = X÷Y×100; Percentage change = (New-Old)÷Old×100.
How precise are the results?
Results are precise to 6 decimal places, with trailing zeros automatically removed. More than sufficient for everyday use.
Is my data sent to a server?
No. All calculations are performed locally in your browser. Your input data is never sent to any server.