Percentage Calculator
One pair of numbers per line, e.g. 25,200 - percentage, change rate, increase and decrease in batch
Mode:
Decimals:
Formula:
Separator:
Calculation Result
Download CSV
| No. | Value A | Value B | Result | Expression |
|---|
Introduction to the tool and how to use it
The percentage calculator solves common percentage questions from just two numbers, and accepts several pasted lines at once for batch calculation.
In rate-of-change mode it marks an increase ↑, a decrease ↓, or no change; rows where the divisor is 0 or that have fewer than two numbers are skipped automatically with a notice.
In rate-of-change mode it marks an increase ↑, a decrease ↓, or no change; rows where the divisor is 0 or that have fewer than two numbers are skipped automatically with a notice.
How to use
- Enter one pair per line, separated by a comma or space, such as
25,200. - Choose the calculation mode (what percentage A is of B / B% of A / rate of change / increase by B% / decrease by B%).
- Click Calculate; the result table shows the expression and answer, with one-click copy and CSV export.
Percent math
Percentage conversion for 100 and 25
The three most common questions answered at once: share, percentage of a value, and change rate.
- What percent is 25 of 100?25%
- What is 100% of 25?25
- Change rate from 100 to 25-75%
Three common questions
| Question | Result | Formula |
|---|---|---|
| What percent is 25 of 100? | 25% | 25 ÷ 100 × 100 = 25% |
| What is 100% of 25? | 25 | 100 × 25% = 25 |
| Change rate from 100 to 25 | -75% | (25 − 100) ÷ 100 × 100 = -75% |
- Results are rounded to 2 decimals; open the tool for more decimals or batch calculation.
Common inputs
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