Tip Calculator
Enter your bill amount, pick a tip percentage, and this tip calculator instantly shows the tip, the total including tip, and — if you're splitting between people — exactly what each person owes. Use the preset buttons for common rates like 15%, 18%, or 20%, or type any custom percentage.
It's built for the moment the check lands on the table: no sign-up, no rounding surprises, and it works just as well on your phone. Whether you're tipping a server, a delivery driver, or a barber, you'll get a fair number in seconds and a clean per-person split that keeps the math (and the friendships) simple.
How it works
Type the bill amount from your receipt, then choose a tip percentage — tap a preset button (10, 15, 18, 20, or 25%) or enter your own. If you're sharing the bill, set the number of people. The calculator updates as you type, showing the tip amount, the grand total, and each person's share of both the total and the tip.
Formula
The math behind the result is straightforward:
| Value | Formula |
|---|---|
| Tip | bill × (tip % ÷ 100) |
| Total | bill + tip |
| Per person | total ÷ number of people |
| Tip per person | tip ÷ number of people |
Worked example
Say four friends share a $100.00 dinner bill and want to leave a 20% tip. The tip is $100.00 × 0.20 = $20.00, making the total $100.00 + $20.00 = $120.00. Split four ways, each person pays $120.00 ÷ 4 = $30.00, of which $5.00 is their share of the tip.
Frequently asked questions
How much should I tip at a restaurant?
In the United States, 15% to 20% of the pre-tax bill is the standard range for sit-down restaurant service, with 18% to 20% now the most common for good service. Tip 25% or more for exceptional service. For counter service or takeout, tipping is optional, though 10% is a kind gesture when staff prepare or package your order.
How do you calculate a 20% tip without a calculator?
Find 10% of the bill by moving the decimal point one place to the left, then double it. On a $57 bill, 10% is $5.70, so 20% is $11.40. For 15%, take that same 10% figure and add half of it again: $5.70 plus $2.85 gives $8.55. This mental shortcut works for any bill amount.
Should you tip on the pre-tax or post-tax amount?
Etiquette guides generally say the pre-tax subtotal is the correct base, since tax goes to the government rather than reflecting the service you received. In practice many people simply tip on the final total because it is the number printed at the bottom of the check. The difference is small, so choose whichever feels right and be consistent.
How do you split a bill with tip between multiple people?
Add the tip to the bill first, then divide the grand total by the number of people. For a $100 bill with a 20% tip, the total is $120, so four people pay $30 each. Splitting the combined total is fairer and simpler than having each person separately calculate a tip on their own items.
Is it OK to tip less than 15 percent?
Yes, tipping is ultimately discretionary, and a lower tip such as 10% can signal genuinely poor service. Keep in mind, though, that many servers in the US earn a reduced base wage and rely on tips for most of their income. If a problem was the kitchen’s fault rather than the server’s, consider tipping normally and raising the issue with a manager instead.