General Calculator
Discount Rate Calculator
Discount rate is the percentage applied when a product or service is sold below the list p...
Read MoreTip Calculator
Enter the bill amount, tip percentage, and number of people to get the tip and the amount ...
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Discounts and tips are the two percentage calculations people do most often and get wrong most often, because both involve a base that is easy to pick incorrectly.
A discount is applied to the original price, so the saving must be read from that price, not from the reduced one. A tip is normally calculated on the pre-tax bill, which is why tipping on the total slightly overpays.
Frequently Asked Questions
Is 20 % off then 10 % off the same as 30 % off?
No. The second discount applies to the reduced price, so the total is 28 % off. Stacked percentages always multiply, never add.
Should I tip on the pre-tax or post-tax amount?
On the pre-tax amount in most countries. Tipping on the tax is common in practice but means tipping the government.
How do I split a bill with a tip?
Add the tip to the total, then divide by the number of people. Dividing first and tipping each share produces rounding differences of a few cents.
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Sources & last update
2026-10-19