What this calculator does
Enter the pre-tax subtotal from your receipt, an optional sales tax rate, a tip percentage and the number of people sharing, and the calculator returns the tax, the tip, the total to pay and each person's share. Two switches handle the questions that actually cause arguments at the table: whether the tip is figured on the subtotal before tax or on the amount after tax, and whether each person's share should be rounded up to a whole number so cash is easy to collect. The result can be copied as a single line to paste into a chat. Everything runs in your browser; the numbers you type are not sent anywhere.
The formula, step by step
Tip arithmetic looks like one multiplication, but the answer depends on two decisions: what the percentage applies to, and who pays what. The calculator follows this order:
- Tax = subtotal x tax rate (%) / 100.
- Tip = tip base x tip rate (%) / 100, where the tip base is either the pre-tax subtotal or the subtotal plus tax, whichever you choose.
- Total to pay = subtotal + tax + tip.
- Per person = total / number of people. If rounding up is on, each share is raised to the next whole number and the extra money is added to the tip, so the effective tip rate shown reflects what is really paid.
If the receipt already lists a service charge or gratuity, that line is part of the bill, and adding a full tip on top would pay for the same service twice. In that case enter 0, or a small custom percentage if you want to add a little extra.
Quick-reference table (computed when the page is built)
Each cell shows the tip, followed by the total including that tip in brackets, for a pre-tax subtotal and a tip percentage. Tax is left out and no currency is implied, so use the table as a mental-math anchor.
| Subtotal | 10% tip (total) | 15% tip (total) | 18% tip (total) | 20% tip (total) | 25% tip (total) |
|---|---|---|---|---|---|
| 20 | 2.00 (22.00) | 3.00 (23.00) | 3.60 (23.60) | 4.00 (24.00) | 5.00 (25.00) |
| 50 | 5.00 (55.00) | 7.50 (57.50) | 9.00 (59.00) | 10.00 (60.00) | 12.50 (62.50) |
| 100 | 10.00 (110.00) | 15.00 (115.00) | 18.00 (118.00) | 20.00 (120.00) | 25.00 (125.00) |
| 200 | 20.00 (220.00) | 30.00 (230.00) | 36.00 (236.00) | 40.00 (240.00) | 50.00 (250.00) |
Mental shortcut: 10% is the amount with the decimal point moved one place left, 20% is double that, and 15% is 10% plus half of it.
Worked examples (assumed amounts in USD, verified by calculation)
Example 1. Four people splitting evenly
A subtotal of $100 with an 18% tip and no tax, shared by 4 people. The tip is 100 x 0.18 = $18.00, the total is $118.00, and each person pays $29.50.
Example 2. Tip on the pre-tax or the post-tax amount
Take a subtotal of $120, tax of 10%, a 20% tip and 3 people. Tax is $12.00, so the after-tax amount is $132.00. A tip on the pre-tax subtotal is $24.00, giving a total of $156.00 ($52.00 each). A tip on the after-tax amount is $26.40, giving a total of $158.40 ($52.80 each). The two methods differ by $2.40 in total, and the gap widens as the tax rate and the tip rate go up. Many people tip on the pre-tax amount, others on the full amount; neither is an official rule, so pick one and apply it consistently.
Example 3. What rounding up does to the tip
A total of $87.30 shared by 4 people is $21.83 each. If each person pays a whole $22 instead, the group collects $88, and the extra $0.70 effectively goes to the tip. With the rounding option on, this is added to the tip and reflected in the effective tip rate.
Tipping customs differ by country
A tip is a custom, not a legal obligation, and the expectations differ from country to country, from one type of business to another, and over time. No single percentage is right everywhere, which is why this tool does not suggest one.
- United States and Canada: tipping is widely expected at sit-down restaurants, and payment terminals often offer preset percentages. Some restaurants add an automatic service charge for larger parties, so read the receipt before adding anything.
- Many European countries: a service charge is often built into menu prices, and extra tips, where given, tend to be small, such as rounding up the bill. Practice varies from country to country, so do not carry a single rule across borders.
- Japan, China and Korea: tipping is generally not part of everyday dining and service in these countries, and offering money can cause confusion. Some businesses, especially hotels or restaurants catering to visitors, list a service charge on the bill instead. When unsure, look at the bill and follow local guidance.
Customs change and vary by venue. If you are not sure, check the receipt for a service charge or gratuity line, or ask a local.
Pre-tax versus post-tax, and service charges
Tax appears as a separate line on many receipts, partly so that it is easy to see the pre-tax subtotal. Tipping on that subtotal is common, but tipping on the total is also seen, and nobody is wrong for doing either. What matters is deciding once and staying consistent. The mistake that costs the most is paying a gratuity twice: look for words such as "service charge" or "gratuity included" near the bottom of the receipt before reaching for the tip menu.
Splitting between people
- An even split is fair only when everyone ordered roughly the same. If one person had much more, such as a large drink order, dividing in proportion to what each person ordered is kinder.
- Work out the tip on the whole bill once, then divide. Calculating each person's tip separately accumulates rounding differences.
- When one person pays by card and collects from the others, the round-up option gives amounts that are easy to hand over in cash.
- For splits with different items and fewest transfers, the Split the Bill calculator is a better fit.
Common mistakes and limits
- Entering a tax-inclusive total as the subtotal and then adding tax again. The bill field here is the amount before tax; enter the subtotal and the tax rate separately.
- Comparing receipts in different currencies without converting them first. The calculator works on plain numbers and does not know the currency.
- Assuming a card tip always reaches the staff in full. Arrangements differ between businesses, so this cannot be assumed either way.
- Treating the result as a recommendation. The tool multiplies the percentage you choose; it does not advise how much to leave.
- Per-person rounding uses whole units of the currency, which suits dollars and euros but may not suit a currency with no fractional unit; adjust by hand if needed.
Frequently Asked Questions
What if a service charge is already on the bill?
Then the staff are already being paid through that line, and a full extra tip is often not expected. Set the tip to 0 or to a small custom value in this calculator, depending on what you want to leave.
Should the tip be on the pre-tax or post-tax amount?
There is no official rule. Tipping on the pre-tax subtotal is common, but tipping on the total is also seen. Use the "Tip based on" menu to compare both for your bill.
Can I use it to split a bill?
Yes for an even split: enter the number of people and read the per-person amount. If people ordered very different amounts, use the Split the Bill calculator.
Is tipping mandatory?
It is not a legal requirement; it is a local custom. In places where service staff rely on tips, an amount is expected in practice, so learn the local practice before you go. In places where tipping is not customary, there is nothing to calculate.
What does the round-up option do?
It raises each person's share to the next whole number. The extra money counts as additional tip, and the total and effective tip rate are recalculated to match.
Related calculators
If a coupon lowers the bill, work out the real amount first with the Discount Calculator. To check how a price is built from tax, see the Sales Tax / VAT Calculator. The Percentage Calculator handles any other percent question, and the Currency Converter helps when you pay abroad.