Discount calculator
See what you actually pay and what you actually save.
- Runs in your browser — nothing you enter is uploaded
- No sign-up, no quotas, free to use as often as you like
How it works
Shops quote the percentage because it sounds larger than the saving. This works the other way round: it shows the price you will hand over and the money you keep, which are the two numbers that matter.
Stacked discounts do not add up
An extra 20% off an already 30%-reduced price is not 50% off. The second discount applies to the already-reduced price, so 30% then 20% comes to 44%, not 50%. The calculator shows the true combined figure, because this is the single most common mistake with sale pricing.
Order does not matter
Applying 30% then 20% gives exactly the same result as 20% then 30%. Multiplication is commutative, whatever the sign at the till implies.
What it does not include
Tax is not applied. Where tax is added at the till rather than shown on the label, use the tax calculator on the final figure.
Discount calculator — questions
Is 30% off then 20% off the same as 50% off?
No. The second discount comes off the already-reduced price, so the combined total is 44%, not 50%.
Does the order of two discounts matter?
No. The result is identical either way.
Does it include sales tax or VAT?
No. Use the tax calculator on the final price if tax is added at the till.