Percentage of a Percentage Calculator
Take one percentage, then a percentage of that result.
Stacked discounts · Statistics · Runs on your device
Your numbers stay on your device
- Start valueand two %
- Effectiverate shown
- Decimalssupported
- Privateby design
What you can count on
- 3figures in
- A starting value to work on
- Two percentages on top of it
- 4lines back
- The figure you land on
- And the effective rate
- 100%on your device
- No data is sent or stored
- Your calculation is private
Percentage of a Percentage at a glance
- What you enter
- A value and two percentages
- What comes back
- Result, effective percent, difference
- The working shown
- The first step is written out
- How many at once
- One set of figures at a time
- Where it runs
- Runs in your browser, nothing sent
- Rounding
- 4 decimal places
- Price
- Free
- Account required
- No
How to use Percentage of a Percentage
- 1
Enter the Starting Value
Type the number the percentages work on — a price, a headcount, a budget. It starts at 1000.
- 2
Enter the Two Percentages
The first is taken from the starting value. The second is taken from whatever the first one gave you.
- 3
Read the Result
You get the first step written out, the figure you land on, the effective rate, and the difference from where you started.
Frequently asked questions
What is a real-world example of needing this?
A product is 30% off. You have a coupon for an extra 20% off the sale price. To find the total discount, calculate 20% of the remaining 70%. This is 14%. The total discount is 44% (30% + 14%).
How is this different from a regular percentage calculator?
A standard one takes a single percentage of a number. This one chains two — the second is taken from what the first one gave — and shows the effective rate over the pair.
Is '50% of 20%' the same as '20% of 50%'?
Yes, the order of the percentages does not change the result. The underlying mathematical operation is multiplication (0.50 × 0.20 is the same as 0.20 × 0.50), so the outcome is identical.
Do I get a value or a percentage?
Both. The headline is the figure you land on, and the effective rate line underneath shows what share of the starting value that figure is.
Can I use decimal points in the percentages?
Yes, the calculator accepts decimal values. You can enter numbers like '4.5' for 4.5% or '12.75' for 12.75% to perform more precise calculations.
Stacked Discounts Explained
Enter a starting value, a first percentage, and a percentage of that first result. You get the figure at each step, plus the effective rate over the whole thing.
- This calculation is useful for understanding stacked discounts. An offer for 'an extra 40% off the 50% off sale price' is not a 90% discount.
- The extra 40% is applied to the remaining 50% of the price. The calculation (40% of 50%) shows this is a 20% additional discount.
Full specification
| What you enter | A starting value, a first percentage, and a percentage of that first result. |
|---|---|
| What comes back | The final result, the effective percentage, and the difference from the starting value. |
| The working shown | A line such as "20% of 1000" shows the first step before the second percentage is taken. |
| How many at once | One set of figures at a time. |
| Where it runs | Everything happens in your browser tab. The numbers never leave the device. |
| Rounding | Results are rounded to four decimal places on this page. |
| Price | Free |
| Account required | No |
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