Discount Calculator
A discount calculator finds the price after a percentage is taken off, and how much you save. It also handles an extra discount applied on top, such as 30% off then a further 10%, which works out smaller than adding the percentages together. Every answer shows the multiplier method and is checked a second way.
How to use the discount calculator
- Enter the original price.
- Enter the discount percentage, and an extra discount if there is one.
- Press Calculate to see the sale price and saving.
Formula
Worked example: 25% off 80
- Original price: 80
- Discount (%): 25
- Extra discount (%) (optional):
✓ Answer checked
- You save
- 20.00
Step-by-step working (2 steps)
First discount Percentage multiplier
25% off means paying 75%.
Amount saved
Original price minus sale price.
Formulas used
How this was checked
- ✓ Subtracting each discount amount separately gives the same sale price.
Money shown to 2 decimal places.
Frequently asked questions
What is 25% off 80?
80 × 0.75 = 60, so you save 20.
Is 30% off then 10% off the same as 40% off?
No. The second discount applies to the reduced price, so the total is 37% off.
How do I find the original price from a sale price?
Divide the sale price by the multiplier. If 60 is after 25% off, the original was 60 ÷ 0.75 = 80.
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