Formula
Tip = bill × tip % ÷ 100Per person = (bill + tip) ÷ people How it works
Multiply the bill by the tip percentage, add it to the bill and divide by the number of people. Turn on rounding if you would rather each person pays a whole-dollar amount; the extra goes to the tip and the effective percentage is shown.
In the United States, 15–20% is the usual range for table service, with 18–20% now common in cities. Many people tip on the pre-tax amount; if you want to, enter the subtotal before tax as the bill.
Customs differ widely: in much of Europe a service charge is often already included, and in Japan tipping is generally not expected. Check the receipt for a service charge before adding a tip on top.
Frequently asked questions
What is a quick way to work out 20% in my head?
Move the decimal point one place left to get 10%, then double it. For a $64 bill, 10% is $6.40 and 20% is $12.80.
Should I tip on tax?
Etiquette guides generally say tipping on the pre-tax subtotal is fine. The difference is small — on a $100 meal with 8% tax it is about $1.50 at 18%.