How to Calculate a Tip — Around the World
Working out a tip should take five seconds — and knowing the local custom can save you from awkwardly over-tipping in Tokyo or under-tipping in New York. Here is the simple formula, the mental-math shortcuts, and a country-by-country etiquette guide.
To calculate a tip, multiply the bill by the tip rate: tip = bill × (percent ÷ 100). For 20%, take 10% (move the decimal one place) and double it. In the US, 15–20% is standard at restaurants. In much of Europe service is often included, and in Japan tipping is not expected and can even cause confusion.
The Short Answer
A tip is just a percentage of the bill. The formula is tip = bill × (tip percent ÷ 100), and your total is bill + tip. On a $50 meal, a 20% tip is $10, for a $60 total.
Mental-Math Shortcuts
- 10%: move the decimal one place left — $50 → $5.
- 20%: find 10% and double it — $5 → $10.
- 15%: 10% plus half of that 10% — $5 + $2.50 = $7.50.
- 18%: halfway between the 15% and 20% figures.
US Tipping Norms
| Service | Customary tip |
|---|---|
| Restaurant (sit-down) | 15–20% |
| Bartender | $1–$2 per drink |
| Taxi / rideshare | 10–15% |
| Hairdresser / barber | 15–20% |
| Food delivery | 10–15% (min ~$3–$5) |
| Hotel housekeeping | $2–$5 per night |
Tipping Around the World
This is where travelers get caught out. Norms vary enormously:
| Country / region | Custom |
|---|---|
| USA & Canada | 15–20% expected; servers rely on it |
| UK | 10–12.5%, often added as a service charge |
| France, Italy, Spain | Service usually included; round up or add 5–10% for great service |
| Germany | Round up or ~5–10%; tell the server the total |
| Japan & China | No tipping; it can cause confusion or even offense |
| Australia & New Zealand | Not expected; round up for good service |
| Middle East (UAE etc.) | 10–15% common in restaurants |
Splitting the Bill
To split evenly, add the tip first, then divide the total by the number of people: (bill + tip) ÷ people. For a $120 bill with a 20% tip ($24) split four ways, that is $144 ÷ 4 = $36 each.
The Most Common Mistake
The most common slip is tipping on the post-tax total. The custom is to tip on the pre-tax subtotal — tipping on tax quietly adds a few percent you did not intend. The second is double-tipping where service is already included: in much of Europe a service charge may already be on the bill, so check before adding more. When in doubt, a small round-up is always polite.
Related Guides & Calculators
- Tip Calculator
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- Discount Calculator
- How to Calculate a Percentage
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Frequently Asked Questions
How do you calculate a 20% tip quickly?
Find 10% of the bill by moving the decimal one place to the left, then double it. On a $45 bill, 10% is $4.50, so a 20% tip is $9.
Do you tip on the pre-tax or post-tax amount?
The customary practice is to tip on the pre-tax subtotal. Tipping on the post-tax total adds a few extra percent you may not have intended.
How much should you tip at a restaurant?
In the US, 15–20% is standard for sit-down service, with 20% being a typical thank-you for good service. In many other countries the expectation is much lower or already included.
Is tipping expected in Europe?
Often not in the same way as the US. In France, Italy, and Spain service is frequently included, so rounding up or adding 5–10% for excellent service is plenty.
Should you tip in Japan?
No. Tipping is not part of the culture in Japan and can cause confusion or be seen as impolite. Good service is simply expected.