Enter the bill amount and pick a tip percentage — common rates are pre-set as buttons (15% in the US for adequate service, 18-20% for good, 25%+ for excellent), or type a custom percentage for cultures where 10% or no tip at all is the norm. Set the number of people and the calculator splits the total evenly per head.
The 'round up' option bumps the per-person amount up to the next whole dollar (or whole local-currency unit) — useful when you want to avoid messing about with coins. All math is done in floating-point, then rounded to two decimal places at display time, so totals always tally within a cent.
15% has historically been the baseline for adequate service, with 18-20% expected for good service. Many restaurants now suggest 20-25% on the bill itself. Outside the US norms vary widely from 0% (Japan) to 10% (much of Europe).
Convention is on the pre-tax subtotal, but many people just tip on the total for simplicity. The calculator uses whatever bill amount you enter, so feed it whichever figure matches your local etiquette.
Per-person amount is rounded up to the next whole dollar (or local-currency unit). The total tip therefore exceeds the percentage slightly — handy if you want clean cash amounts.
The total is divided evenly. Last-cent rounding errors are absorbed by the per-person figure, so the sum may be 1-2 cents off the original total — a tiny over-tip rather than under.
Explore the full suite of Finance tools and 290+ other free utilities at Chunky Munster.