Tip & Bill Split Calculator
Add a tip and split the bill evenly, to the cent.
Splitting the check across up to 100 people.
Tipping on the pre-tax amount is the common convention.
Total to pay
- Tip
- $17.00
- Person 1
- $27.38
- Person 2
- $27.38
- Person 3
- $27.37
- Person 4
- $27.37
Each person's share is rounded to the cent, and the shares sum to exactly the total.
How the tip calculator works
The calculator takes four inputs: the pre-tax bill, the tax amount, a tip percentage, and the number of people splitting the check. It computes the tip, adds everything into a grand total, then divides that total into whole-cent shares.
The math is direct. The tip is tip = tipBase * tipPct / 100, where tipBase is the pre-tax bill by default (or bill plus tax if you turn that option on). The grand total is total = bill + tax + tip. Each amount is rounded to the nearest cent, rounding half away from zero, so $17.305 would become $17.31. The per-person split uses a largest-remainder method: every share starts at the floor of total / people, and any leftover cents are handed out one at a time to the lowest-numbered people. This guarantees the shares sum to the total exactly, with no cent lost or invented.
Worked example
A table of four has a pre-tax bill of $86.50 with $7.14 tax, tipping 20% on the pre-tax amount.
- Tip:
86.50 * 20 / 100 = $17.30 - Total:
86.50 + 7.14 + 17.30 = $110.94 - Even share:
110.94 / 4 = $27.735, which is not a whole cent - The total is 11,094 cents. Four equal floors of 2,773 cents sum to 11,092, leaving 2 cents
- Those 2 cents go to the first two people
| Person | Share |
|---|---|
| 1 | $27.74 |
| 2 | $27.74 |
| 3 | $27.73 |
| 4 | $27.73 |
The four shares add to $110.94, matching the total to the cent.
How to use it
- Enter the pre-tax bill, not the amount that already includes tax. Put the tax in its own field.
- Set the tip percentage. Common choices are 18% or 20% for table service, but any non-negative number works.
- Choose whether the tip is calculated on the pre-tax bill or on bill plus tax. Pre-tax is the usual default.
- Set the number of people. It must be a whole number of one or more.
- Read off the tip, the grand total, and each person’s share. If shares differ by a cent, that is the rounding remainder, not an error.
Limitations
This calculator assumes one tip percentage applied to the whole check and an equal split across the group. It does not handle separate tabs, items charged to different people, group discounts, automatic gratuities already printed on the bill, or service charges that some restaurants add for large parties. If the receipt already includes a gratuity line, do not enter a tip percentage on top of it unless you mean to tip extra. The result is an arithmetic estimate to help you settle a bill quickly, not financial or tax advice. Always check the receipt against what the calculator shows before paying.
Frequently asked questions
Should I tip on the pre-tax amount or the total with tax?
Tipping on the pre-tax bill is the common convention in the United States, because tax is a government charge rather than a measure of service. This calculator tips on the pre-tax bill by default, but you can switch it to tip on bill plus tax if you prefer. On a $86.50 meal with $7.14 tax, a 20% tip is $17.30 pre-tax versus $18.73 on the taxed total.
Why do some people pay one cent more than others?
Whole-cent amounts rarely divide evenly across a group. Instead of rounding each share and leaving the group short or over, the calculator gives the leftover cents to the first few people so the shares add back to the exact total. The difference is at most one cent per person.
What is a standard tip percentage at a restaurant?
In the United States, 15% is the low end for adequate service, 18% to 20% is standard for good sit-down service, and 25% or more rewards exceptional service. Counter service, takeout, and delivery follow different norms. Enter whatever percentage you choose; the calculator does not assume one.
Can I split a bill unevenly when people ordered different amounts?
This tool splits the grand total evenly across the group. For uneven splits, total each person's items separately, apply the tip percentage to each subtotal, and add tax per item. An even split is the right model when the group agrees to share the cost equally.
Does a higher tip change how the total is rounded?
The tip is rounded to the nearest cent first, then added to the bill and tax to form the total. Rounding happens once at each presentation step, so the displayed tip, total, and per-person shares always reconcile to the same number.