Split Bill Calculator

What the split bill calculator does

When a group eats out, the check arrives as one number, and the awkward part is turning it into fair shares that include tax and tip. This split bill calculator takes the subtotal, the tax from the receipt, a tip percentage and the number of people, then shows what each person pays. If people ordered very different amounts, you can enter uneven shares and the calculator divides the tax and the tip in the same proportions. Every split is worked out in whole cents, so the shares always add up to the exact total.

How to use the split bill calculator

1. Bill before tax: the subtotal for food and drinks.
2. Tax on the bill: the dollar amount of tax printed on the receipt. Enter 0 if there is none.
3. Tip percentage: for example 18 or 20.
4. Tip calculated on: the bill before tax (the usual choice) or the bill including tax.
5. Number of people sharing the check.
6. Uneven shares (optional): leave blank for an even split. Otherwise enter one number per person, separated by commas.

Two ways to enter uneven shares

• What each person ordered. Add up each person’s items from the receipt and enter those amounts, such as 42.50, 28, 31.75. Each person then pays for their own food plus their fair part of the tax and tip.
• Weights or percentages. Enter simple proportions or percentages that add up to 100. For two adults and two children sharing a family meal, 2, 2, 1, 1 means each adult pays twice what each child pays.

The result table lists every person’s share, their part of the food, their part of the tax and tip, and what they pay.

How to split a bill by hand

Even split with tax and tip

Five friends have a $148 subtotal with $12.21 tax, and they tip 18% on the pre-tax amount:

• Tip = 148 × 0.18 = $26.64
• Total = 148 + 12.21 + 26.64 = $186.85
• Each person = 186.85 ÷ 5 = $37.37

How to calculate tax and tip when splitting a bill by item

Two people share a $90 subtotal. One ordered $58 of food and the other $32. Tax is $7.20 and the tip is 20% of the subtotal, $18, so the total is $115.20.

• First person: 58 ÷ 90 = 64.44% of the bill, so 115.20 × 58 ÷ 90 = $74.24
• Second person: 32 ÷ 90 = 35.56% of the bill, so 115.20 × 32 ÷ 90 = $40.96

Together that is $115.20, the full check. Each person paid for their own food plus a matching share of tax and tip, which is fairer than either an even split ($57.60 each) or adding the tax and tip only to the bigger order.

Even or uneven: which is fairer?

An even split is quick and works well when everyone ordered roughly the same. It starts to feel unfair when orders differ a lot, or when some people had drinks and others didn’t. A proportional split by item subtotal means everyone pays the same percentage for tax and tip on top of what they actually ordered. It takes a minute with the receipt, but nobody subsidizes anyone else.

A common middle ground is to split shared dishes evenly first, add each person’s half or third of a shared appetizer to their own items, and then enter those subtotals.

Splitting household bills based on income

The same proportional method works for rent, utilities or groceries shared by a couple or housemates. Enter the monthly bill, set the tax and tip to 0, and type each person’s income (or take-home pay) as their share. If two partners earn $72,000 and $48,000, the split is 60% and 40%: a $1,850 rent bill becomes $1,110 and $740. Some households prefer this to a 50/50 split when incomes differ a lot; others split evenly and keep things simple. The calculator just applies whatever percentages the shares imply.

Splitting the odd cent

Money only comes in whole cents, so a total like $100.00 can’t be divided into three exactly equal shares. The calculator gives the lower amount as the main result and notes how many people pay one cent more. For uneven splits it uses the largest remainder method: everyone’s share is rounded down to the cent, and the leftover cents go to the people whose exact shares were closest to the next cent up. This keeps every share within a cent of its exact value and the total correct.

Tipping and automatic gratuity

Tipping in the U.S. is voluntary. The IRS defines a tip as a payment the customer chooses to make and whose amount the customer decides, so a mandatory 18% or 20% charge that some restaurants add for large parties counts as a service charge, not a tip. Before you add a tip, check whether the receipt already includes one. If it does, set the tip to 0% or enter only the extra you want to leave.

Tips are a large part of many servers’ pay. Under federal law, an employer can pay a tipped employee a cash wage as low as $2.13 an hour, provided tips bring their earnings up to at least the $7.25 federal minimum wage.

Common mistakes

• Adding the tip to each share separately and rounding differently, which leaves the total short.
• Splitting the tax evenly when orders differ. Tax is charged on what was ordered, so it should follow the order.
• Tipping on the discounted price after a voucher, when the service was for the full meal.
• Forgetting an automatic gratuity already on the check.

Related calculations

For a single payer or a quick tip comparison at 15%, 18%, 20% and 25%, the tip calculator is simpler. If your receipt shows only a rate, the sales tax calculator works out the tax amount. Splitting by weights is a ratio problem, and the ratio calculator can scale any ratio to a total.