How much to tip on $45
Multiply the bill by the tip rate as a decimal. On a $45.00 bill, 18% is $45.00 x 0.18 = $8.10. The table covers the common rates; 15% to 20% is standard for sit-down service in the US, 18% to 20% is typical in cities, and 22% to 25% is for outstanding service or large parties.
| Tip rate | Tip | Total with tip |
|---|---|---|
| 15% | $6.75 | $51.75 |
| 18% | $8.10 | $53.10 |
| 20% | $9.00 | $54.00 |
| 22% | $9.90 | $54.90 |
| 25% | $11.25 | $56.25 |
Splitting a $45.00 bill
Add the tip first, then divide by the number of people. Each share below includes the tip.
| Tip rate | 2 people | 3 people | 4 people |
|---|---|---|---|
| 15% | $25.88 | $17.25 | $12.94 |
| 18% | $26.55 | $17.70 | $13.28 |
| 20% | $27.00 | $18.00 | $13.50 |
| 22% | $27.45 | $18.30 | $13.73 |
| 25% | $28.13 | $18.75 | $14.06 |
Mental math for a $45.00 bill
Ten percent of $45.00 is $4.50: just move the decimal point one place to the left. From there, 20% is double ($9.00), 15% is 10% plus half of 10% ($4.50 + $2.25 = $6.75), and 5% is half of 10% ($2.25). Round to the nearest dollar if that is easier; a tip of $9.00 instead of $9.00 is well within the normal range.
Before or after tax?
Etiquette guides recommend tipping on the pre-tax subtotal. In practice, many people tip on the total, and the difference is small: at 8% sales tax, a 20% tip on the post-tax amount of a $45.00 pre-tax bill is $9.72 instead of $9.00, about $0.72 more. Check whether a service charge or gratuity has already been added, which is common for parties of six or more; in that case no extra tip is expected.
Nearby bill amounts
tip on $30, tip on $35, tip on $40, tip on $50, tip on $55, tip on $60. For any other amount or to round each share up to a whole dollar, use the tip calculator.