Tip and Split Calculator

The bill arrives, someone pulls out a phone, and the table spends five minutes arguing over whether the split came out right. Fill in three fields, the bill amount, the tip percentage and the number of people, and the output gives you four lines: the tip amount, the total with tip included, and the per-person figure in two versions, before and after the tip. It recalculates as you type.

Two things to know. Amounts are formatted in Brazilian reais, with R$ and a comma for decimals, and the output labels are in Portuguese, since the widget is shared with the Portuguese page; the arithmetic itself is currency-agnostic, so read the figures in whatever currency you are paying. The tip field starts at 15, standard in the US, while a Brazilian service charge is usually 10 percent and is optional by custom.

Each per-person figure is rounded on its own, so the parts can overshoot the whole: 100 with a 10 percent tip split three ways shows 36.67 each, which adds up to 110.01. Somebody covers the extra cent. The split is always even, so if one person only had water, work their share out separately or run the numbers twice for subgroups. A fractional headcount is truncated, 3.7 becomes 3, and an empty field counts as zero.