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The tip calculator below shows how much to give service providers, such as waiters or delivery drivers.
The standard tip for a restaurant server is 15%-20%, based on the experience, according to Elaine Swann, lifestyle and etiquette expert and founder of the Swann School of Protocol. That's also about how much to tip a hairdresser and how much to tip a massage therapist if you can, she says.
» MORE: How much to tip just about everyone
For most service interactions outside of the food industry, tips are a nice gesture to thank someone for going above and beyond, but not necessary, she adds.
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