Tip & Bill Split Calculator
Calculate tip, split the bill among any number of people with per-person subtotal/tip/total, and optionally round each share up to the next dollar.
Result
How to use this calculator
- Enter the bill amount before tip (use the pre-tax subtotal for US tipping etiquette).
- Pick a tip percentage — 15% standard, 18-20% good service, 20%+ excellent.
- Set how many people are splitting the bill evenly.
- Choose whether to round each share up to the next whole dollar — easier to pay, slightly nicer tip.
About this calculator
Tipping varies by country and context. In the United States, 15-20% on the pre-tax subtotal is the standard for sit-down service, with 20%+ reserved for excellent service or larger parties. Europe is typically lower (5-10%) and a service charge is often already included on the bill, so check before adding more. When splitting between friends, the math gets awkward when the per-person amount has odd cents — rounding up to the next whole dollar makes paying simpler and slightly increases the tip, which servers appreciate. This calculator handles all three: figuring the tip, splitting the bill evenly, and showing you exactly what changes when you round up.
What this calculator does
Calculates the tip on a restaurant bill, splits the total evenly across any number of diners, and optionally rounds each share up to the next whole dollar so cash splits are tidy and the server gets a slightly larger tip. Shows the per-person subtotal, per-person tip, and per-person final amount — so each diner can pay their share without anyone having to do napkin math at the table. Defaults follow US sit-down convention (18% on the pre-tax subtotal), but the tip percentage is fully adjustable for international tipping norms or for takeout/delivery contexts.
How it works — the formula
tipAmount = bill × (tipPct / 100)
totalBill = bill + tipAmount
perPerson = totalBill / people
if round-up: perPersonFinal = ceil(perPerson) ; newTotal = perPersonFinal × peopleTip is a straight percentage applied to the pre-tax subtotal — the amount the server actually controls. Splitting is an even division of the post-tip total, which keeps each diner's share proportional. The round-up option ceils each share to the next whole dollar; the small per-person rounding sums into a slightly larger effective tip across the table, which is the most common reason groups choose it. Tipping etiquette guidance is published by the US Bureau of Labor Statistics (which tracks tipped occupations) and by the Emily Post Institute, the standard reference for US service-industry tipping norms.
Worked examples
- Inputs:
- bill = $50.00, tipPct = 18%, people = 1, roundUp = no
- Output:
- Tip $9.00; total $59.00; per person $59.00
Single diner — no split. 18% is the standard midpoint of the Emily Post 15–20% sit-down range.
- Inputs:
- bill = $120.00, tipPct = 20%, people = 4, roundUp = no
- Output:
- Tip $24.00; total $144.00; per person $36.00
Exact split because $144 / 4 divides evenly. Each person owes $30 subtotal + $6 tip.
- Inputs:
- bill = $87.43, tipPct = 18%, people = 3, roundUp = yes
- Output:
- Per person $35.00; new total $105.00; effective tip $17.57 (20.1%) — round-up added $1.04
$87.43 × 1.18 = $103.16; per-person raw = $34.39; ceil to $35 → new table total $105. The extra $1.04 goes to the server.
When to use this vs other tools
Tip Calculator is the right tool when you are paying for service. For the underlying math or for adjacent retail/business percent calculations, the tools below specialize.
- Percentage Calculator
Use when you just want the general-purpose three-mode percent tool (what is X% of Y, X is what % of Y, percentage change) without the bill-split UI.
- Discount Calculator
Use when calculating a percent off a list price for retail — the inverse direction from tipping but the same X% of Y arithmetic.
- Markup Calculator
Use to price inventory from cost — markup is computed off cost, not revenue, which makes it mathematically different from the tip-on-subtotal pattern.
- Profit Margin Calculator
Use to report profit as a percentage of revenue — useful for restaurant owners reading tip/check ratios from POS reports.
Authority note
The Emily Post Institute is the long-standing US authority on tipping etiquette, including the 15-20% sit-down convention and the pre-tax-subtotal base. The BLS Occupational Outlook documents the US tipped-wage structure — context for why tipping levels meaningfully affect server earnings. The percentage arithmetic underneath is the NIST SP 811 §7.10.2 definition of the percent symbol as division by 100.
Limitations
- Tipping norms are US-centric here; many European, Australian, and Japanese restaurants either include a service charge or expect 0–10%, so check the bill and local custom before applying the US default.
- If the bill already has an automatic gratuity or service charge (common for parties of 6+), the listed tip line is usually that charge — adding the calculator's tip on top double-tips. Read the bottom of the receipt first.
- Tipping on the pre-tax subtotal is the etiquette standard; tipping on the post-tax total inflates the tip by your local tax rate with no benefit to the server.
- Even splits do not handle the case where one diner had a $40 entrée and another had a $12 salad — for unequal orders use a per-item split or ask the server to split the check first.
Tip suggestions are conventions, not rules. Adjust for service quality, local custom, takeout vs dine-in, and group size. The math itself is exact arithmetic; only the appropriate tip percentage is a judgement call.