Discount Calculator
Calculate the sale price and savings from a percentage or fixed-amount discount, with optional sales tax afterwards.
Your inputs
Results
You pay
$60.00
- Price after discount
- $60.00
- You save
- $20.00
- Effective discount
- 25%
✓Exact calculation — rounded only for display
What this calculator does
See exactly what you pay after a discount, and how much you save.
Formula and method
Sale price = price × (1 − discount %) or price − amount off; You pay = sale price × (1 + tax %)
Worked example
Calculated by this tool with its default inputs:
Inputs
- Original price: 80 (any currency)
- Discount type: Percentage off
- Discount: 25 %
- Sales tax after discount (optional): 0 %
Results
- You pay: 60
- Price after discount: 60
- You save: 20
- Effective discount: 25%
How to read the results
Effective discount expresses fixed-amount discounts as a percentage.
Assumptions and limitations
- Tax is applied after the discount, as in most places.
Questions
Is 25 % off 80 equal to 60?
Yes — you save 20.
Methodology and verification
- Result type
- Exact mathematical calculation (rounded only for display)
- Formula version
- 1.0
- Automated verification
- 3 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
- Editorial review
- Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.
Privacy
Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy