What is a 20% tip on $90?

$18 — when dining out, a 20% tip on a $90 bill comes to $18. Adding the tip to the original bill gives you the total amount to pay. In the United States, tips between 15% and 20% are customary for sit-down restaurant service.

Tip amounts can vary based on service quality, party size, and local customs. Many people tip 15% for adequate service and 20% or more for exceptional service. Use the full tip calculator to split the bill among multiple diners.

Below is the step-by-step calculation used to determine the result.