What this calculates
This works out the tip on a bill, the total you will actually pay, and what each person owes when you split it. Enter the bill, pick a percentage and say how many people are sharing — the answer updates as you type.
It also compares your bill across the tips people leave most often, which is the quickest way to see what moving from 15% to 20% really costs.
The formula
Three steps, in order. The tip is a percentage of the bill, the total is the two added together, and the share is the total divided between everyone.
The tip
tip = bill × (percent ÷ 100)The total
total = bill + tipEach person's share
share = total ÷ peopleThe one to be careful with is the last. Money stops at two decimal places, so a total that does not divide evenly leaves a gap of a paise or two between the shares and the bill.
Worked example
Now try the same bill at 15% instead: the tip drops to 480, the total to 3,680, and each share to 736. Four percentage points is a little over 19 per person — worth knowing, but rarely worth an argument.
When to use it, and the mistakes to avoid
Use it at the table when the bill arrives, when a group needs an even split, or when you want to check what a percentage actually comes to before agreeing to it.
What trips people up:
- Tipping on top of a service charge. Many bills, especially for large parties, already include 12.5% or similar. Read the bill before adding more.
- Assuming one country's norm travels. 20% is expected in the United States and unusual in much of Europe and Asia. Tip by local convention, not habit.
- Splitting the bill but not the tip. If you divide the bill and then each add your own tip, the percentages rarely match. Total first, then divide.
- Forgetting the rounding. Shares that do not divide evenly leave the table a fraction short. Somebody has to round up.
- Tipping on the post-tax figure without meaning to. Convention is the pre-tax bill; enter whichever you intend.
FAQ
How much should I actually tip?
It depends entirely on where you are. In the United States 18-20% is the norm in a restaurant and staff often depend on it. In the United Kingdom 10-12.5% is usual, and many bills already include a service charge. In India 5-10% is common in restaurants that do not add one. This calculator does not assume a convention — it does the arithmetic on whatever percentage you choose.
Do I tip on the bill before or after tax?
Convention is to tip on the pre-tax bill, though plenty of people tip on the total and nobody will object. This calculator applies the percentage to whatever figure you type in, so enter the pre-tax amount if that is what you want to tip on.
What if a service charge is already on the bill?
Then the tip is usually already covered and adding another is optional. Check the bill for a line reading 'service charge' or 'gratuity', often 12.5% in the UK and frequently added automatically for large parties. If one is there, either set the tip to 0% here or enter only what you want to add on top.
Why doesn't each share multiply back to exactly the total?
Because money only goes to two decimal places. A total of 100 split three ways is 33.33 each, and three times 33.33 is 99.99 — a paise short. The calculator tells you when this happens so one person can cover the difference rather than the table quietly underpaying.
How do I work out a tip in my head?
Find 10% by moving the decimal point one place left. From there, 20% is double it, 15% is 10% plus half of 10%, and 5% is half of 10%. On a 2,400 bill: 10% is 240, so 15% is 360 and 20% is 480. It is close enough at the table, and this calculator is for when it needs to be exact.
Should the tip be split evenly if we ordered differently?
That is a social question, not a mathematical one. An even split is simplest and is what this calculator does. If someone had significantly more, work out their share of the bill separately and apply the same percentage to it — the tip stays proportional either way.