A tip is an extra amount given to show appreciation for service. Tipping customs vary by country and culture. In the US, 15-20% is typical.

1. Enter the bill amount. 2. Select or enter tip percentage. 3. Enter number of people to calculate per-person amounts.

Restaurant: 15-20%, Delivery: 10-15%, Taxi: 10-15%, Hair salon: 15-20%. Tip more for excellent service, less for poor service.