Percentage Calculator
Three percentage questions in one tool: X% of Y, X is what percent of Y, and the percentage increase or decrease between two numbers.
Good to know
- Results are rounded to four decimals; the formula is shown next to each answer.
Common questions
Which formulas does it use?
X/100 × Y, X/Y × 100, and (Y − X)/|X| × 100 for change. Each formula is shown next to the result.
Why is my change negative?
A decrease produces a negative percentage. The sign shows direction, not an error.
How are results rounded?
Displayed to four decimal places; the calculation itself is not rounded between steps.
Is this tool really free?
Yes. There is no account, no paywall and no usage limit. Tools App is funded by aumenso, the studio behind it.
Is anything I enter uploaded?
No. The tool runs in your browser tab; what you enter is never sent to us and never stored.
Need this built for your business?
aumenso builds websites, branding, SEO, GoHighLevel funnels and custom software for agencies and businesses across North America and Europe. These tools are the same team's work, given away free.