How to Calculate a Tip
Calculating a tip is straightforward once you know the percentage you want to leave. Multiply the pre-tax bill amount by the tip percentage expressed as a decimal. For a 20% tip on a $50 bill: $50 × 0.20 = $10 tip, making the total $60. For a 15% tip on the same bill: $50 × 0.15 = $7.50 tip, total $57.50.
A quick mental maths shortcut for a 10% tip is to move the decimal point one place to the left. On a $50 bill, 10% is $5. Double it for 20% ($10), or add half for 15% ($7.50). This works for any bill amount and is useful when you want a quick estimate without a calculator.
For an exact calculation with bill splitting, currency conversion, or multiple people, the ToolBullet Tip Calculator handles all of this instantly. Enter the bill amount, select your tip percentage and number of people, and it calculates each person's share including tip.
How Much Should You Tip?
There is no worldwide “correct” tip. The amount can depend on country, service type, whether a service charge is already included, the venue and local practice. Treat the examples below as orientation rather than fixed rules, and check the bill or ask locally when unsure.
Do not add a second tip automatically when a service charge is already included. Where tipping is optional, the choice and amount remain yours.
Restaurant examples by destination
United States: Emily Post’s current general guide lists 15–20% of the pre-tax bill for sit-down wait service. Individual venues, local wage rules and automatic gratuities can differ, so check the bill before adding more.
Britain: VisitBritain says tipping is not required, although 10–15% is commonly appreciated for good restaurant service when an optional service charge has not already been added. Taxi fares are often rounded up.
Australia: Tourism Australia says tipping is a choice rather than an expectation. It notes that 10% may be common in upmarket restaurants for good service, but this is not a universal requirement.
Japan: The Japan National Tourism Organization says tipping is not common or expected in restaurants, taxis and hotels. In unusual situations where a gratuity is appropriate, local presentation customs may matter.
Other destinations: Practices can vary within the same country and between tourist, luxury and local venues. ToolBullet does not publish unsupported percentage rules for every destination. Check official tourism guidance, the venue’s bill and current local advice.
Other services
Service-specific guidance also varies. Emily Post lists percentage or fixed-amount examples for US taxis, delivery, hotels and salons, while VisitBritain and Tourism Australia describe different expectations in Britain and Australia. Use the same checks: look for an included charge, consider the local norm, and avoid assuming a restaurant percentage applies to every service.
Sources and review date
- Emily Post — General Tipping Guide (United States)
- VisitBritain — useful information and tipping in Britain
- Tourism Australia — travel tips and tipping
- Japan National Tourism Organization — tipping in Japan
Guidance reviewed 25 July 2026. Tipping practices can change and may differ by region, venue and service.
How to Split a Bill Between Friends
Splitting a restaurant bill equally between friends is straightforward when everyone has ordered similar amounts. Divide the total bill including tip by the number of people. For example, a $120 bill with a 20% tip = $144 total ÷ 4 people = $36 each.
When people have ordered very different amounts — one person had multiple courses and wine while another had a salad and water — splitting equally can feel unfair. In these cases, you can calculate each person's share individually, add their proportional share of any shared items, and then add tip based on their subtotal.
The ToolBullet Tip Calculator handles equal splits instantly — enter the total bill, choose your tip percentage, and set the number of people sharing. It shows each person's share in your chosen currency.