How to Calculate a Tip
Calculating a tip is straightforward: multiply the pre-tax bill amount by the tip percentage expressed as a decimal. For example, an 18% tip on an $85 bill is $85 × 0.18 = $15.30. The total you owe is $85 + $15.30 = $100.30. If you are splitting with one other person, each person pays $100.30 ÷ 2 = $50.15.
Most people leave between 15% and 20% for sit-down restaurant service. The U.S. average tip has trended upward in recent years, with 18–20% now considered the standard for good service. This calculator lets you choose from common preset percentages or enter any custom amount.
Standard Tipping Guidelines
Tipping expectations vary by service type and location. Here are widely accepted norms in the United States:
- Restaurants (sit-down): 15–20% for standard service; 20–25% for exceptional service; 10% or less for poor service.
- Bars and bartenders: $1–2 per drink or 15–20% of the tab.
- Food delivery: 10–15% of the order total, with a $3–5 minimum recommended.
- Hair salons and barbers: 15–20% of the service cost.
- Taxis and rideshares: 15–20% of the fare.
- Hotel housekeeping: $2–5 per night left daily (not just at checkout).
- Valet parking: $2–5 when your car is returned.
Should You Tip on the Pre-Tax or Post-Tax Amount?
There is no universal rule, but most etiquette guides suggest tipping on the pre-tax subtotal — the cost of food and drink before sales tax is added. Tax is a government charge, not a measure of the service you received. In practice, the difference is small (sales tax typically ranges from 5–10%), so many people simply tip on the total for convenience. This calculator uses the bill amount you enter, so enter either the pre-tax or post-tax amount depending on your preference.
How to Split a Bill Fairly
When splitting a bill evenly, add the tip to the total first, then divide by the number of people. Splitting the bill without including the tip and adding individual tips separately often leads to math errors and under-tipping. The cleanest approach: agree on a tip percentage, calculate the total bill plus tip, and divide equally.
If people ordered very different amounts, consider splitting proportionally. However, for most group meals the difference in individual orders is modest, and equal splitting saves time and avoids awkwardness.
Rounding Your Tip
It is perfectly acceptable — and common — to round your tip up to the nearest dollar for a cleaner total. A calculated tip of $15.30 might be rounded to $16. Servers generally appreciate round numbers, and it makes cash payment simpler. This calculator shows the exact figures; feel free to round up slightly when you pay.
Tip Prompts on Card Readers
Modern card readers often prompt you to select a tip percentage, sometimes showing options like 18%, 20%, 22%, and 25% — all higher than the historical 15% standard. These presets are set by the business, not a legal requirement. You are always free to enter a custom amount or decline to tip if the service did not warrant one. Being aware of what each percentage means in dollar terms — which this calculator shows instantly — helps you make a confident choice at the point of sale.