Percentage Calculator
A percentage calculator helps you quickly work out percentages without manual formulas.
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Choose a calculation mode and enter values
How percentage calculation works
X% of Y = (X / 100) × Y. X is what % of Y = (X / Y) × 100. X is Y% of what = X / (Y / 100).
Step 1: Choose type
Pick the percentage formula you want to calculate.
Step 2: Enter values
Add the two numbers for the selected formula.
Step 3: Read result
Use the result directly for discounts, tax, and quick checks.
Percentage calculator FAQ
A percentage is a way of expressing a number as parts per hundred.
Use (percentage / 100) × amount, or switch mode to calculate reverse percentage.
It is 14, because 70 × 0.20 = 14.
It is 20, because 100 × 0.20 = 20.
Get started with free invoicing
Use your percentages directly in Nexbal invoices and quotes.