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Tip Calculator — Free Online ToolThe tip formula
The core formula is straightforward:
Tip amount = Bill × (Tip % ÷ 100)
Total = Bill + Tip amount
For example, a 20% tip on a $50 bill: $50 × 0.20 = $10.00 tip, making the total $60.00.
Quick mental math shortcuts
You don't always have a calculator handy. These shortcuts let you estimate tips in seconds:
- 10% trick: Move the decimal one place left. $47.80 → $4.78 tip (10%).
- 20% trick: Find 10% and double it. $47.80 → $4.78 × 2 = $9.56 (20%).
- 15% trick: Find 10%, then add half of that. $47.80 → $4.78 + $2.39 = $7.17 (15%).
- Rounding: Round to the nearest dollar for convenience — tipping $10 on a $48.20 bill is perfectly fine.
Standard tip percentages by context
Tipping norms vary by industry, quality of service, and country. Here are US conventions as a reference:
- 10% — Counter service, buffets, or service that fell short of expectations.
- 15% — Standard for adequate table service at sit-down restaurants.
- 18–20% — Good service. The de-facto standard in most US cities.
- 25%+ — Exceptional service, a regular spot, or a special occasion.
- Bartenders: $1–2 per drink, or 15–20% on a tab.
- Food delivery: 10–15%, more if the weather is bad or the order is large.
- Hair stylists, taxis, hotel staff: 15–20% is standard in the US.
How to split a bill
To split a bill equally among a group:
- Calculate the tip: Bill × Tip %
- Add tip to the bill to get the total.
- Divide the total by the number of people.
Example: $80 bill, 20% tip, 4 people. Tip = $16. Total = $96. Per person = $96 ÷ 4 = $24.00.
Our Tip Calculator does this in one step — just enter the bill, percentage and number of people.
Should I tip on pre-tax or post-tax?
In the US, tipping is traditionally calculated on the pre-tax subtotal. However, tipping on the post-tax total is also widely accepted and the difference is usually just a dollar or two. Pick whichever feels right to you — the server won't know the difference.
Tipping outside the US
Tipping customs vary enormously around the world. In Japan, tipping is considered rude. In most of Western Europe, 5–10% or rounding up to the nearest euro is common but not obligatory. In Australia and New Zealand, tipping is appreciated but not expected. In Canada and Mexico, norms are similar to the US at 15–20%.
Frequently asked questions
How do I calculate a 20% tip?
Move the decimal one place left to get 10%, then double it. For a $45 bill: $4.50 × 2 = $9.00. Or use the calculator above.
How do I split a bill among multiple people?
Add the tip to the subtotal to get the grand total, then divide by the number of diners. For $60 + $12 tip = $72 ÷ 4 = $18 per person.
What is a good tip percentage?
15–20% for sit-down restaurant service in the US. 10% for counter service. 25%+ for exceptional service. Norms vary widely outside the US — always research local customs when traveling.
Conclusion
Tip calculation comes down to a simple multiplication — once you know your shortcut for 10%, the rest follows in seconds. For group dinners with different orders, or when you just want a precise answer quickly, use our free Tip Calculator to get the exact split in one step.
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