Unequal split calculator: split a bill by item or amount

When to use an unequal split

Use it when orders differ enough that an equal split would make the lighter orders pay for the heavier ones. If everyone’s order is within a few dollars of everyone else’s, an equal split is simpler, and splitting evenly or paying for what you ordered helps you decide which suits the table.

How the calculator splits the bill

It handles two to six people and works in four steps.

1. Own items. Each person’s own items, before tax and tip.
2. Shared items. The total of dishes everyone had is divided equally by the number of people at the table.
3. Amount before tax and tip. Own items plus that equal part of the shared dishes.
4. Tax and tip. The two are added together and spread in proportion to the amounts from step 3, so everyone pays the same percent on top.

As a formula, each person pays their amount × (1 + (tax + tip) ÷ everyone’s amounts added together). The totals add up to the receipt, and the calculator shows an equal split next to them for comparison.

Worked example: four people, one receipt

Say four people at a table ordered $42.00, $18.00, $31.00 and $27.00 of their own items, plus $24.00 of shared dishes. The receipt shows $11.36 of tax, and the tip is $28.40. These are the numbers the calculator opens with.

The shared dishes come to $24.00 ÷ 4 = $6.00 each, so the amounts before tax and tip are $48.00, $24.00, $37.00 and $33.00, which add up to $142.00. That matches the receipt subtotal ($118.00 of own items plus $24.00 shared). Tax and tip together are $39.76, which is 28% of $142.00, so everyone pays 28% on top.

Person	Before tax and tip	With tax and tip	Against an equal split
Person 1	$48.00	$61.44	$16.00 more
Person 2	$24.00	$30.72	$14.72 less
Person 3	$37.00	$47.36	$1.92 more
Person 4	$33.00	$42.24	$3.20 less

The four totals add up to $181.76, the receipt total. An equal split would be $181.76 ÷ 4 = $45.44 each.

Spreading tax and tip equally instead would add $9.94 to each person. Person 2 would then pay $33.94, which is $3.22 more than the $30.72 above, and Person 1 would pay $57.94, which is $3.50 less than the $61.44 above. That is the difference proportional tax and tip makes on this table.

When the cents do not divide evenly

Totals rarely land on whole cents. Say three people each order $10.00, share $10.00 of dishes and pay $1.00 of tax with no tip. The receipt is $41.00, and each person’s exact share is $13.667 before rounding. The calculator gives $13.67, $13.67 and $13.66, which add up to $41.00. Rounding all three to $13.67 would collect $41.01, one cent too much.

Mistakes to avoid

• Entering prices with tax already added. Type the items before tax and put the tax in its own box.
• Putting a shared dish in one person’s items. That person then pays for all of it. Use the shared items box.
• Skipping the tie-out. Own items plus shared items should equal the receipt subtotal. If they do not, an item is missing.

Using the shares in EvenOut

EvenOut’s “By item” split divides each item evenly among the people you pick, and the items must add up to the expense total, so tax and tip go in as items too, each split evenly among whoever you pick. To keep tax and tip in proportion, take each person’s total from this calculator and type it under “Exact amounts”. The status pill reads “All assigned” when the amounts add up to the expense total. With EvenOut Pro, scanning a receipt splits tax and tip in proportion to each person’s items.

For the same job without a calculator, see how to split a bill unevenly and how to split a receipt by item. If everyone ordered alike and you only need tax, tip and a discount, use the split bill calculator with tax and tip. To weight shares by a ratio you choose, such as 2 to 1, try the split by shares calculator.