Splitting a bill at the end of dinner is the kind of thing that should not require a calculator — but it does, because doing 18% of $174.30 divided by 5 in your head is genuinely hard. This page does the arithmetic in one step: bill, tip percentage, headcount → per-person total and total tip.
The tip is calculated on the bill before being divided, which is the convention everywhere. Per-person totals are rounded to two decimal places, so the rounding "stub" (a cent or two) lands on whichever person pays by card; the others can transfer the round number.
(Bill × (1 + tip/100)) ÷ number of people, rounded to two decimal places. The tip is calculated on the pre-tip subtotal, not on the bill including tax — which matches US convention. In countries where tax is included in the menu price, this is the right formula.
It varies by country: 18–20% is standard in the US, 10–15% in the UK and Australia (and often added as a service charge already), 5–10% in much of continental Europe, and 0% in Japan, China and South Korea where tipping can be considered insulting.
The per-person figure is rounded to two decimal places. If you want exact division to the cent, give the largest "share" to the person who paid by card and let the others Venmo round numbers — most groups don't care about the missing 1¢.
This calculator does even splits only. For itemised splitting, total each person's items separately, then run the tip calculation on each subtotal individually before summing.
Explore the full suite of Finance tools and 290+ other free utilities at Chunky Munster.