A tip calculator multiplies your bill by the tip percentage to get the tip, adds it to the total, and divides by the number of people. In the US, 15β20% is standard β 20% of a $50 bill is a $10 tip. Updated June 2026.
How it works
Tip = bill Γ tip%. Total = bill + tip. Per person = total Γ· number of people. Tipping on the pre-tax amount is customary, though many people tip on the total for simplicity.