Enter the bill and the tip percent. Split it between friends and round up to an easy number.
How much should you tip?
Customs vary by country and change over time, so treat these as common US norms rather than rules:
| Service | Typical tip |
|---|
| Sit-down restaurant | 15–20% of the bill before tax; 20% or more for great service |
| Bar | $1–2 per drink, or 15–20% of the tab |
| Food delivery | 15–20%, with a few dollars minimum |
| Taxi or rideshare | 15–20% |
| Hair stylist or barber | 15–20% |
| Hotel housekeeping | $2–5 per night |
Outside the US, tipping is often smaller or already included as a service charge, so check the receipt first.
Quick mental math
- 10%: move the decimal point one place left. 10% of $64.50 is $6.45.
- 20%: double the 10%. $6.45 × 2 = $12.90.
- 15%: 10% plus half of it. $6.45 + $3.23 = $9.68.
How we checked this
Before every update, this calculator is run in a real browser with these known answers, and it must match all of them:
- 20% on $64.50 split 2 ways: $38.70 each ✓
Last checked October 26, 2026. Spotted something wrong? The math is done in your browser with the formula shown on this page, so you can check any result by hand.
Questions people ask
How do I calculate a 20% tip?
Move the decimal point one place left to get 10%, then double it. On a $45 bill, 10% is $4.50, so 20% is $9.
Should I tip on the total before or after tax?
Before tax is the usual custom, though tipping on the total is simpler and a little more generous.
How do I split a bill evenly?
Add the tip to the bill, then divide by the number of people. Use the round-up option so everyone pays a whole-dollar amount.