Tip & Bill Split Calculator

The awkward part of a restaurant bill is rarely the tip. It is dividing the total by 4 while everyone is putting their coats on. The Tip Calculator handles both at once: pick a percentage, set the head count, and it reports what each person owes as well as what the tip comes to.

Five quick percentages cover the usual range, 10, 15, 18, 20 and 25, with 18 selected by default as the mid-point of standard US restaurant practice. A Custom button opens a field for anything else and takes focus straight away, which is a small thing that matters when you are doing this one-handed.

The split control steps between 1 and 50 people. Per-person cards only appear once the count is above 1, so a solo meal shows 2 figures rather than 4 identical ones. Everything is computed on the page.

Worked Example: Splitting a Table of Four

A bill of 86.40 with the default 18% tip produces a tip of $15.55 and a total of $101.95. Step the counter to 4 and two more cards appear: $3.89 tip per person and $25.49 total per person. A summary line runs along the bottom restating the arithmetic as Bill + Tip (18%) = Total, which is the thing to hold up when somebody at the table disputes the number.

Precision, Rounding and the Missing Cent

• Every figure is rounded to 2 decimals for display, but the division is done on the unrounded total. Four people at $25.49 each comes to $101.96, a cent above the total shown.
• That penny is unavoidable in any equal split of an amount that does not divide by the head count. Someone has to absorb it, and the tool does not pretend otherwise.
• The tip is calculated on the full bill as entered. In jurisdictions where tipping on the pre-tax subtotal is the convention, enter the subtotal rather than the total.
• Commas are stripped from the bill amount, so a figure pasted from a receipt as 1,240.00 parses correctly.
• A bill of 0 or less produces no result at all, just the prompt Enter a bill amount to calculate the tip. A custom tip of 0 is perfectly valid and gives a total equal to the bill.
• The currency symbol is fixed at a dollar sign and the formatting follows US conventions. The arithmetic is currency-agnostic, so the figures are correct whatever you are actually paying in.