How do I calculate a 20% tip?

To calculate a 20% tip, multiply the bill amount by 0.20. For example, 20% of a $50 bill is $50 × 0.20 = $10. A quick shortcut: find 10% by moving the decimal point one place left, then double it.

What is a good tip percentage?

In the United States, 15–20% is standard for sit-down restaurants. 15% is considered acceptable, 18% is common, and 20% or more is generous. For exceptional service, 25% or higher is appropriate. For takeout, 10–15% is typical.

How do I split a bill evenly?

Add the tip to the total bill, then divide by the number of people. For example, a $100 bill with an 18% tip ($18) equals $118 total. Split 4 ways: $118 ÷ 4 = $29.50 per person.

How much do I tip on a $50 bill?

At 15%: $7.50. At 18%: $9.00. At 20%: $10.00. At 25%: $12.50. The most common tip on a $50 bill is between $9 and $10.

How much is 15% of $100?

15% of $100 is $15.00. To calculate: $100 × 0.15 = $15. A quick shortcut: 10% of $100 is $10, plus half of that ($5) gives you $15.

Tip Calculator

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Tip Per Person

Formula: Tip = Bill × (Tip% ÷ 100) | Per Person = (Bill + Tip) ÷ Number of People

Quick Reference — Tip Amounts

Bill	15% Tip	18% Tip	20% Tip
$20	$3.00	$3.60	$4.00
$30	$4.50	$5.40	$6.00
$50	$7.50	$9.00	$10.00
$75	$11.25	$13.50	$15.00
$100	$15.00	$18.00	$20.00

How to Calculate a Tip

Calculating a tip is straightforward: multiply the bill amount by the tip percentage (as a decimal). For example, to leave a 20% tip on a $60 bill: $60 × 0.20 = $12.00. The total you'd pay is $60 + $12 = $72.00.

Quick mental math shortcut: To calculate 10%, simply move the decimal point one place to the left ($60 → $6.00). For 20%, double that amount ($6 × 2 = $12). For 15%, add half of 10% to the 10% amount ($6 + $3 = $9).

Standard Tipping Etiquette

Tipping customs vary by country. In the United States, these are typical guidelines:

Sit-down restaurants: 15–20% of the pre-tax bill is standard. 18% is the most common default.
Buffet: 10–15% is typical.
Takeout: 10–15% is increasingly common, though not always expected.
Delivery: 15–20%, with a minimum of $3–5.
Coffee / counter service: $1–2 per drink, or 15–20% of the order.
Bartender: $1–2 per drink, or 15–20% of the tab.

In many European and Asian countries, tipping is less common or already included in the bill as a service charge. Always check whether a gratuity has been added before tipping extra.

How to Split a Bill

To split a bill evenly, first calculate the total including the tip, then divide by the number of people. For example, a $120 bill with an 18% tip: $120 × 0.18 = $21.60 tip, total = $141.60. Split 4 ways: $141.60 ÷ 4 = $35.40 per person.

When splitting unevenly, have each person calculate their share of the food, then add the same tip percentage to each individual share. This ensures the tip is proportional to what each person ordered.

Frequently Asked Questions

How do I calculate a 20% tip?: Multiply the bill by 0.20. For example, 20% of $50 = $50 × 0.20 = $10.00. Quick shortcut: find 10% by moving the decimal left, then double it.
What is a good tip percentage?: In the US, 15–20% is standard for restaurants. 15% is acceptable, 18% is common, and 20%+ is generous. For exceptional service, 25% or more is appropriate.
How do I split a bill evenly?: Add the tip to the bill total, then divide by the number of people. For example, a $100 bill + $18 tip = $118 total. Split 4 ways: $118 ÷ 4 = $29.50 per person.
How much do I tip on a $50 bill?: At 15%: $7.50. At 18%: $9.00. At 20%: $10.00. At 25%: $12.50. The most common tip is between $9 and $10.
How much is 15% of $100?: $15.00. To calculate: $100 × 0.15 = $15. Quick shortcut: 10% of $100 is $10, plus half of that ($5) = $15.