Tip Calculator & Bill Splitter
Tip calculator: tip amount, total with tip and each person’s share when splitting the bill.
P = B · (1 + t)n
How to use this calculator
- Choose the quantity you want under “Solve for”.
- Type the known values and pick their units: any combination works.
- The result updates as you type. Open “Show the steps” to see the substitution.
Enter the bill, the tip percentage and the number of people to get the tip, the total and how much each person pays.
In US restaurants 15–20 % is customary for table service; many people tip on the pre-tax amount.
Formula
P = B · (1 + t)n
| Symbol | Quantity | Units |
|---|---|---|
| B | Bill amount | $, €, £ |
| t | Tip | %, × |
| n | Number of people | — |
| P | Total per person | $, €, £ |
Worked example
Given: B = 120.00 $ · t = 18 % · n = 4
P = B · (1 + t)n
Result: P = 35.40 $
Total per person for different values of Bill amount
| B · Bill amount | P · Total per person |
|---|---|
| 60.00 $ | 17.70 $ |
| 90.00 $ | 26.55 $ |
| 108.00 $ | 31.86 $ |
| 120.00 $ | 35.40 $ |
| 132.00 $ | 38.94 $ |
| 150.00 $ | 44.25 $ |
| 180.00 $ | 53.10 $ |
| 240.00 $ | 70.80 $ |
Other values as in the worked example.
Frequently asked questions
How much is an 18 % tip on $120 for 4 people?
Tip $21.60, total $141.60, or $35.40 each.
Should I tip on the total before or after tax?
Either is accepted; tipping on the pre-tax subtotal is the most common practice.
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