Finance
Discount Calculator
Enter the original price and discount rate to see what you save.
Inputs
Results
Useful next checks
- Compare a few scenarios before making a decision.
- Check rates, fees, tax, and timing outside the estimate.
- Use the explanation below to understand the formula.
Intro
Use this discount calculator to find the sale price, saving, and final cost after a percentage discount. Enter the original price and discount rate to check whether a deal is worth it.
What this discount calculator does
The calculator answers three common shopping questions:
- How much money do I save?
- What is the final sale price?
- What percentage discount was applied to the original price?
It is useful for retail sales, subscription offers, seasonal promotions, and quick price comparisons.
How it works
The saving is calculated as price x discount rate. The sale price is calculated as price - saving.
A 25% discount is entered as 25, then treated as 0.25 in the calculation. The calculator multiplies the original price by 0.25 to find the saving, then subtracts that saving from the original price.
Example calculation
A 25% discount on 120 saves 30 because 120 x 0.25 = 30. The final sale price is 90 because 120 - 30 = 90.
If a second store offers the same item for 95 without a discount, the 25% sale price is still cheaper in this example.
How to use the result
Use the sale price to compare offers by final cost, not just by headline discount. A large discount on an inflated original price may still be worse than a smaller discount from a lower starting price.
If tax is added or included separately, use the VAT Calculator. For tip calculations after a discount, use the Tip Calculator.
Assumptions and limitations
- The calculator assumes one percentage discount.
- It does not handle stacked coupons, loyalty points, delivery fees, or tax unless you add those separately.
- The discount should be between 0% and 100% for a normal sale price.
- Rounding at checkout may vary by retailer or payment system.
FAQs
- How do I calculate 20% off? Multiply the original price by 0.20 to find the saving, then subtract it from the original price.
- Is 50% off the same as half price? Yes. A 50% discount leaves 50% of the original price.
- Can I use this for coupons? Yes, if the coupon is a simple percentage off the item or order.
- Does this include tax? No. Calculate the discount first or tax first depending on how the seller applies it.
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Frequently asked questions
Can I enter more than 100%?
The calculator validates the discount so the sale price cannot go below zero.
Does it include tax?
No. Use the VAT calculator if you need to add or remove tax.