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Guide1 min readUpdated July 8, 2026

How to calculate a tip

Short answer

Multiply the bill by the tip percentage as a decimal: for 18% on $50, that is 50 x 0.18 = $9. Add it to the bill for the total, then divide by the number of people to split it.

The formula

A tip is a percentage of the bill. Convert the percentage to a decimal (divide by 100) and multiply. See how to calculate a percentage for the underlying math.

tip   = bill * (percent / 100)
total = bill + tip
each  = total / people
Tip and total

Example: a $50 bill at 20% is 50 x 0.20 = $10 tip, $60 total. Split between 3 people that is $20 each.

Common tip rates

Typical US restaurant tips
15%— Standard / okay service18%— Good service20%+— Great service
Try it: Tip CalculatorEnter the bill, tip percent, and party size for the tip, total, and per-person amount.Open tool
Tip on pre-tax or post-tax?Either is common; tipping on the pre-tax subtotal is slightly more precise, but many people tip on the total for simplicity. Consistency matters more than the exact base.

References

Questions

How do I calculate a 20% tip?

Multiply the bill by 0.20. A quick trick: take 10% by moving the decimal one place left, then double it. For $45, 10% is $4.50, so 20% is $9.

How do I split a bill with tip?

Add the tip to the bill for the total, then divide by the number of people. For a $60 total split three ways, each person pays $20.

Does the tip calculator store my numbers?

No. The calculation runs entirely in your browser tab. Nothing you enter is uploaded or stored.

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