Calculate the tip and split the bill between friends, with an option to round each share up.
Customs vary. In the US, 15–20% is usual at sit-down restaurants. In the UK and India, around 10% is common unless a service charge is already on the bill. Many countries in Europe and East Asia expect little or no tip.
Etiquette guides usually suggest tipping on the pre-tax amount. Enter whichever amount you prefer.
Take 10% of the bill, add 10% again, then subtract 2%. On 50: 5 + 5 − 1 = 9.
Usually yes. If the bill already includes a service charge, an extra tip is optional.