CALCULATORS
Percentages, with the calculation visible.
Calculate a percentage of a value, a percentage change or a discount. See the inputs and formula alongside the result.
No account needed. Files and inputs stay on your device.
THE WORKSPACE
Runs in your browserPercentage calculator
A CLEAR WORKFLOW
How to use RSPercentDesk
- 01
Choose the calculation type.
- 02
Enter the values.
- 03
Calculate and read the formula.
- 04
Check the reference value before using the result.
WORKED EXAMPLE
A practical starting point
A change from 80 to 100 is a 25% increase because the difference, 20, is divided by the original value, 80.
Before you download
Why does the base value matter?
Percentage change divides by the original value. Reversing the direction usually gives a different percentage.
Can the starting value be zero?
A percentage change from zero is undefined. The tool reports that case instead of returning infinity.
Are percentages financial advice?
No. This calculator performs arithmetic on the values you enter.
USEFUL READING