ChompCalc

Tip Calculator

Calculate tip amount instantly. Works for single payment or split among multiple people.

Tipping math is simple in theory and surprisingly easy to fumble at the table — especially after a few drinks, on a tax-inclusive check, or when the bill needs to be split. This calculator takes the bill amount and the tip percentage you choose and instantly shows the tip, the new total, and — if you are dining as a group — the amount each person owes, so no one is left squinting at the receipt doing long division.

Beyond the arithmetic, tipping is a small social contract that varies a lot by country and context. In the United States, tipping is effectively part of a server's wage; in much of Europe and Asia it is optional or already included. The tool helps you land on a fair, confident number for the situation you are in, whether that is a 20% tip for great service at a US restaurant or a modest round-up at a café where tipping is not expected.

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Plug in some numbers —

we'll crunch.

How to use

  1. 1Enter the total bill amount before tip.
  2. 2Select the tip percentage based on service quality.
  3. 3If splitting, enter the number of people.
  4. 4See the tip amount and per-person total instantly.

How it works

The core formula is just two steps: Tip = Bill × (tip percentage ÷ 100), and Total = Bill + Tip. To split, divide the total by the number of people. The only judgment call is which bill figure to tip on — the pre-tax subtotal or the post-tax total. Tipping on the pre-tax amount is the technically "correct" convention, since the tax is not part of the service, though many people simply tip on the round total for ease.

A handy mental shortcut for a 20% tip: take 10% of the bill (move the decimal one place left) and double it. For 15%, take that same 10% and add half of it again. These tricks let you sanity-check the calculator's output, and they are why 15%, 18%, and 20% have become the standard preset choices — they sit at round, easy-to-compute points.

Worked examples

A standard restaurant tip

Your bill is $80 and you want to leave a 20% tip for good service.

  • Tip = 80 × 0.20 = $16.
  • Total = 80 + 16 = $96.

You leave $16, for a $96 total. Using the 10%-and-double trick ($8 × 2 = $16) gives the same answer in your head.

Splitting a group dinner

A $145 bill, an 18% tip, split evenly among 5 friends.

  • Tip = 145 × 0.18 = $26.10.
  • Total = 145 + 26.10 = $171.10.
  • Per person = 171.10 ÷ 5 = $34.22.

Each person owes $34.22 — and rounding up to $35 each is the polite move, since the small surplus covers any rounding shortfall on the tip.

Tips & common mistakes

Tip on the pre-tax subtotal when you want to be precise: sales tax is a government charge, not a measure of the service you received. On a check with high local tax, tipping on the post-tax total quietly adds a couple of extra percent to your tip.

Know the local norm before you travel. In the US, 18–20% is standard for sit-down service because tips are a core part of staff income. In much of Europe, service is often included and a 5–10% round-up is generous; in Japan, tipping can even cause confusion. Over-tipping abroad is harmless but unnecessary; under-tipping in the US genuinely hurts a worker's pay.

When splitting, round up per person rather than down — collecting $35 from each friend is easier than chasing $34.22, and the few cents of cushion prevent the awkward shortfall when the card total doesn't quite add up. If one person ordered far more than everyone else, consider paying by item and splitting only the tip, which keeps the math fair without creating resentment.

Frequently asked questions

Last reviewed: June 2026