How this instrument works
A tip is calculated as a straightforward percentage of the bill: multiply the bill amount by the tip percentage, expressed as a decimal, and that product is the tip. Add the tip back onto the original bill and you get the total amount to pay, whether that's cash left on the table or the figure you type into a card terminal's tip screen.
The percentage itself is a matter of local custom rather than a fixed rule. In much of the United States, 15 to 20 percent is a commonly cited range for full-service restaurant dining, with 20 percent often treated as the default for good service; many other countries either build service into the menu price or expect a much smaller, optional gesture instead. This calculator does the arithmetic for whatever percentage you decide fits the situation.
Splitting a tip across a group is the same calculation run twice: work out the tip and total for the full bill here, then divide that total by however many people are sharing it. Rounding the per-person share up slightly, rather than down, avoids everyone quietly under-tipping by a few cents each.
- Enter Bill amount ($) — the pre-tip total from your receipt or check.
- Enter Tip percentage (%) — commonly 15-20% for full-service dining, adjust up or down for the service you received.
- Read Tip amount — the dollar amount to add on top of the bill.
- Read Total to pay — the bill plus the tip, ready to hand over or enter on a card terminal.
- For a group, divide Total to pay by the number of people splitting the bill.
Worked example — a $50 restaurant bill at 20%
Enter 50 for Bill amount and 20 for Tip percentage — a $50.00 dinner bill for two, with a straightforward 20% tip for good service. Multiplying gives 50 x (20 / 100) = $10.00, so Tip amount reads 10.00.
Adding that tip back onto the bill, Total to pay reads 60.00 — $60.00 handed to the server or entered on the card machine. Splitting that evenly between two diners comes to $30.00 each, tip already included.
Questions
How much should I tip at a restaurant?
In much of the United States, 15 to 20 percent of the pre-tax bill is the commonly cited range for full-service dining, with 20 percent often treated as the default for good service and 15 percent as a floor for adequate service. On a $50.00 bill, that works out to a $7.50 to $10.00 tip — enter your bill amount and preferred percentage above to get an exact figure.
Should I tip on the total before or after tax?
Either is common, and the difference is usually small: tipping on the pre-tax subtotal is the stricter interpretation, since sales tax isn't service the server provided, while tipping on the post-tax total is simpler and only adds a percent or two more in most places. This calculator's Bill amount field works with whichever figure you enter.
How do I split a tip and bill between a group?
Calculate the tip and total for the full bill first, then divide Total to pay by the number of people sharing it. For an uneven split, some groups instead divide only the pre-tip bill by item and add each person's share of the tip on top, which better reflects who ordered what.
Is 20% always the expected tip?
No — 20% has become a common default for good full-service restaurant dining in the US, but expectations shift by context: counter service, delivery, bars and buffets often see lower percentages, while exceptional service or a large group booking can justify more. This calculator works the same way at any percentage you enter.
Why does the tip amount look different from my receipt's suggestion?
Many receipts print a small table of suggested tips at fixed percentages like 15%, 18% and 20%, rounded to the nearest cent, which can differ by a cent or two from an exact calculation depending on their rounding method. This instrument computes the tip directly from your bill amount and chosen percentage, to the cent.