How to calculate a tip
Multiply the bill by the tip percentage, then divide by 100. Add the tip to the bill for the total.
tip = bill × tip % ÷ 100
total = bill + tip
each person = total ÷ number of people
Example: a bill of 86.40, an 18% tip, split 3 ways.
Tip = 86.40 × 0.18 = 15.55. Total = 86.40 + 15.55 = 101.95.
Each person pays 101.95 ÷ 3 = 33.98. Rounded up, that's 34 each.
Quick ways to tip in your head
- 10%: move the decimal point one place left. 10% of 86.40 is 8.64.
- 20%: find 10% and double it. 8.64 × 2 = 17.28.
- 15%: find 10%, then add half of it. 8.64 + 4.32 = 12.96.
- 18%: find 20% and subtract 2% (a fifth of 10%). 17.28 − 1.73 = 15.55.
How much to tip
Customs vary a lot by country, so check what's normal where you are. In the United States, typical guidance is:
| Service | Usual tip (US) |
|---|---|
| Sit-down restaurant | 15–20%, more for great service |
| Bar | About 1–2 per drink, or 15–20% of the tab |
| Food delivery | 10–20%, with a few dollars as a minimum |
| Taxi or rideshare | 10–20% |
| Hair salon or barber | 15–20% |
In much of Europe, a service charge is often already on the bill, and rounding up or leaving 5–10% is common. In Japan, tipping is generally not expected. Always check whether a service charge has already been added before you tip.
Should you tip on the amount before or after tax?
Etiquette guides usually suggest tipping on the amount before tax, since tax isn't part of the service. Many people tip on the full total because it's simpler, and the difference is small. To tip on the pre-tax amount, enter the subtotal from the receipt as the bill.
Frequently asked questions
What does "round up" do?
It rounds each person's share up to the next whole amount, so nobody needs coins. The extra goes to the tip, and the calculator shows the new tip percentage.
How do I split a bill unevenly?
Work out each person's share of the food first, then use this calculator on each share with the same tip percentage. Everyone tips in proportion to what they ordered.
Should I tip on a discounted bill?
It's considered polite to tip on the original price before a coupon or discount, because the staff did the same work.
Last reviewed November 2026.