Tip is calculated as a percentage of the pre-tax bill amount.
A $75 restaurant bill, 18% tip, split among 3 people:
Bill
$75.00
Tip (18%)
$75 × 0.18 = $13.50
Total
$75 + $13.50 = $88.50
Per person total
$88.50 ÷ 3 = $29.50
Per person tip
$13.50 ÷ 3 = $4.50
Each of 3 people pays $29.50, including a $4.50 tip contribution for good service.
This tool turns a bill, a tip percentage, and a head count into four numbers: the total tip, the full total with tip, each person’s share of that total, and each person’s share of the tip alone. It removes the awkward arithmetic from the end of a meal.
It is built for the everyday moment when a check lands on the table and a group needs to settle up quickly. It also works for any single-payer situation — a haircut, a cab, a delivery — where you just want to know the right amount to add.
The tip is a percentage of the bill, so the first step is to convert the percentage to a decimal and multiply: Tip = Bill × (Tip% ÷ 100). An 18% tip on a $75 bill is 75 × 0.18 = $13.50. Add that to the bill for the total, $88.50.
Splitting is just division. The per-person total is the grand total divided by the number of diners, and the per-person tip is the tip divided the same way. For three people on that $88.50 total, each owes 88.50 ÷ 3 = $29.50, of which $4.50 is tip.
The tip amount is what you write on the gratuity line; the total with tip is what actually leaves your account. The two per-person figures answer the question groups always ask — "what do I owe?" — and separate out how much of that is the tip in case people want to chip in only for service.
Because the split is even, the per-person numbers assume everyone shares the bill equally. If one person ordered far more, treat the calculator as a starting point and nudge the shares by hand.
Etiquette guides generally say tip on the pre-tax subtotal, since the tax is not part of the service. Tipping on the post-tax total is common too and simply leaves a slightly larger, more generous tip.
The difference is usually small. On a $75 subtotal with $6 in tax, an 18% tip is $13.50 pre-tax versus $14.58 post-tax — about a dollar. Pick one approach and apply it consistently rather than agonizing over the gap.
Say four friends share a $120 bill and want to leave 20%. The tip is 120 × 0.20 = $24, making the total $144. Divided four ways, each person pays 144 ÷ 4 = $36, of which 24 ÷ 4 = $6 is the tip.
A fast check: 20% is one-fifth, and one-fifth of $120 is $24, which matches. Quick fractions like this — 10% is a tenth, 20% a fifth, 25% a quarter — let you verify any tip at a glance.
Many restaurants add an automatic service charge for large parties, and some bills include it without making it obvious. Always scan the itemized check before adding a tip so you do not pay gratuity twice.
Tipping customs also vary widely by country — in some places service is included by law and extra tipping is unusual. The percentages here reflect US norms, so adjust when you travel.
In the US, 15–20% is standard for sit-down restaurant service. 20% is widely considered the baseline for good service; 25% or more for exceptional. Takeout tipping is optional but 10–15% is appreciated.
Convention varies. Most etiquette guides say tip on the pre-tax subtotal, but tipping on the total (including tax) is a common and generous practice.
For a precise split, total each person’s items, add their share of tax and tip. This calculator assumes equal splits — for unequal amounts, use separate calculations.
Common US tipping norms: hairstylist 15–20%, hotel housekeeping $2–5/night, taxi 15–20%, food delivery 15–20%, bartender $1–2 per drink or 15–20% of the tab.
Find 10% of the bill by moving the decimal one place left, then build from there. On a $75 bill, 10% is $7.50; double it for a 20% tip of $15, or add half of the 10% ($3.75) to reach roughly an 18% tip of about $13.50. This gets you within a few cents without any device.
Either works — pick whichever is simpler. Some people round the tip up to a whole dollar; others round the grand total to a round number and let the tip absorb the difference. Both leave a fair gratuity; rounding the total just makes the final charge easier to remember.
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
Note
This calculator is an educational tool. For graded coursework, exams, or professional work, double-check the method and rounding against your own requirements.
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