Split a bill
For the moment at the table. Everyone ate much the same thing. If you didn't, use split a bill unevenly. If several of you paid for different things over a trip, use who owes whom.
Add the total, the tip and how many of you there are. No sign-up, nothing saved, and the pennies actually add up.
Everyone settles their own share at the till.
2 of you pay a penny more — $33.43 against $33.42. The shares add back to exactly $100.28.
The part most calculators get wrong
A bill of $100 between three people is $33.3333 each. No calculator can hand you a third of a cent, so most of them round every share up or down and quietly hand you three numbers that don't add back to $100.
That's fine when you're guessing. It's not fine when three people are putting cash on a table, because someone ends up short and nobody knows who.
This one allocates the remainder instead of rounding it: everyone gets the floor, and the leftover pennies go out one at a time. The shares always add back to the exact total, and it tells you who absorbed the extra.
Splitting it unevenly
If one person skipped the wine or had the cheapest thing on the menu, an equal split isn't the fair answer — and a tip calculator can't help you.
For that you need the bill itemised: each dish going to whoever ate it, with tax and service spread in proportion rather than divided flat. That's what Stub does from a photo of the receipt, and it's why it exists.
There's a calculator for that too, if you want to do it by hand this once.
Doing this every week with the same people?
Stub keeps the running total so you don't have to. Photograph the bill, it reads the amount, works out who owes what, and asks them for you four days later. Free, with no daily limit.
Nothing you type here is sent anywhere or stored. Stub records what people owe each other; it never holds or moves money.