Bill Split Calculator

Split a bill between friends, with or without the service charge, and round up per person if you want.

How to use

  1. Type the bill total and how many people are splitting it.
  2. Choose the service charge — 10%, 12%, 15%, none, or a custom rate.
  3. Optionally round each share up to R$ 0.50 or R$ 1.00 and see exactly how much extra the table collects.

About this tool

Splitting a bill is a two-step calculation that is easy to get wrong at the table. First the service charge is added to the whole bill, then the result is divided by the number of people — not the other way round, and never by adding the tip after dividing. A bill of R$ 128.40 for three people with 10% service becomes R$ 141.24, which is R$ 47.08 each. Without the service charge, the same bill would be R$ 42.80 per person, and the tool always shows both numbers so nobody is surprised.

In Brazil the 10% service charge is customary, not mandatory: it is a suggestion printed on the bill, and the customer may decline it. Many restaurants now print 12% or 15% instead, which is why the tool offers presets for all three plus a free-form rate. The percentage is applied to the consumption total exactly as the bill does it, so what you read here matches what the establishment charges when the same rate is used.

The round-up option solves the practical problem of change: R$ 47.08 each is arithmetically correct and physically annoying. Rounding each share up to the next R$ 0.50 makes it R$ 47.50 per person, which collects R$ 142.50 in total — R$ 1.26 more than the bill. That surplus is shown explicitly, so the table can decide whether it goes to the waiter or comes back as change. This is an equal split: if someone ordered much more than the others, split the shared items here and add the individual ones by hand. Everything runs in your browser, with no account and nothing recorded.

The formula

Total with service = T × (1 + s ÷ 100). Share per person = total with service ÷ N. Rounded share = ceil(share ÷ step) × step, where step is 0.50 or 1.00; the leftover is (rounded share × N) − total with service.

Frequently asked questions

Is the 10% service charge mandatory in Brazil?

No. The service charge is customary and can be declined by the customer — it is a suggested tip, not a legal obligation. Restaurants must inform the amount, and many now suggest 12% or 15%.

Should I add the tip before or after dividing?

Add it to the full bill first, then divide. Adding a percentage to each individual share gives the same result mathematically, but calculating it on the total avoids rounding differences between the shares.

How does the round-up work?

Each person's share is rounded up to the next multiple of R$ 0.50 or R$ 1.00, and the tool shows how much extra the group ends up collecting so you can decide what to do with the difference.

What if someone ordered much more than the rest?

Use the calculator for the shared part of the bill and add the individual items separately. This tool performs an equal split of whatever total you type in.

Does the bill amount leave my browser?

No. The whole calculation happens locally in JavaScript on your device — nothing is uploaded or saved.

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