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Calculate My Portion of the Bill

This proportional bill splitter works out what you owe on a shared receipt. Enter the receipt subtotal, the tax and a tip, then type the prices of what you had. Your total is your items plus your share of the tax and your share of the tip, where your share is how much of the subtotal your items make up. Amounts have no currency symbol, so it works in any currency.

How to calculate your portion of the bill

Receipt subtotal - the whole bill before tax and tip, as printed on the receipt.
Tax amount - the total tax on the receipt. Leave it empty if there is none: a blank tax counts as 0.
Tip percentage - select 15%, 18% or 20%, or type your own percentage in the box. Select the same preset again to clear it. The tip starts empty, so there is no tip until you choose one: tipping customs differ from country to country.
My items - type the prices of what you had. You can add them up right in the box.

Total owed appears in large type and updates as you type. Under it are three lines, Your items, Your share of the tax and Your share of the tip, and a note that says what percentage of the subtotal your items are.

What you can type in My items

You do not need to add your items up first. The box reads simple arithmetic, so you can paste the prices straight from the receipt.

You type	What it does
`15.50 + 4`	Adds two items: 19.50
`12 + 8.5 * 2`	Multiplies before it adds, so 8.50 twice plus 12: 29.00
`(9 + 6) * 2`	Brackets first: two of a 15.00 combo, 30.00
`22 - 3`	A minus takes off a discount or coupon: 19.00
`2 x 7.50`	The letter x, the sign × and the sign ÷ work as well as `*` and `/`

If the box holds something that cannot be read, such as a stray letter, it counts as 0 and a warning tells you to fix it. If your items add up to more than the receipt subtotal, a warning says your share is capped at the whole bill.

How the proportional bill split works

Your share is your items divided by the receipt subtotal. Your part of the tax is the tax times that share, and your part of the tip is the tip times that share. The tip itself is the tip percentage times the subtotal.

A worked example

The receipt subtotal is 80.00, the tax is 6.40 and the tip is 18%. You had a 15.50 dish and an 8.50 drink, so you type 15.50 + 8.50 in My items.

Your items: 24.00, which is 30.0% of the 80.00 subtotal
Your share of the tax: 6.40 × 30.0% = 1.92
Your share of the tip: 18% of 80.00 is 14.40, and 14.40 × 30.0% = 4.32
Total owed: 24.00 + 1.92 + 4.32 = 30.24

Tip before or after tax

Select Advanced details to open Tip is calculated on. It has two options: The subtotal, before tax (usual), which is the default, and The subtotal plus tax. In the example above, choosing the second option makes the full tip 18% of 86.40, which is 15.55, so your share of the tip becomes 4.67 and your total 30.59. The tax share is not affected.

Rounding, so the lines add up

Each of the three lines is rounded to the decimals your currency uses: two for most currencies, none for the yen. The total is the sum of those rounded lines, so what you read always adds up. It can differ from rounding the unrounded sum by a cent.

What this calculator does and does not do

It does	It does not
Work out one person's share of one receipt	Split a bill between several people: use the Fair Bill Splitter to give every person a total
Add up your items for you, with discounts	Divide a bill by income: see the Fair Share Calculator
Tip on the subtotal or on subtotal plus tax	Choose a tip for you: it starts empty
Run in your browser: nothing is uploaded or saved	Read a photo of the receipt

Frequently Asked Questions

How do you calculate your portion of the bill?

Divide the prices of your own items by the receipt subtotal to get your share of the bill. Then take that same share of the tax and of the tip, and add the three amounts to your items. Type the subtotal, tax, tip and your item prices and the Total owed is worked out for you.

How do you split sales tax?

Sales tax is charged on the whole receipt, so each person carries the part that matches their share of the subtotal. If your items are 30% of the subtotal, you owe 30% of the tax. Enter the total tax once and your share of the tax is shown on its own line.

Do you tip on tax or the pre-tax subtotal?

Either, and the choice is yours. The usual way is to tip on the subtotal before tax, which is what this tool does by default. If you tip on the subtotal plus tax, press Advanced details and choose the option "The subtotal plus tax". Your share of the tip then follows the base you chose.

How do you calculate the percentage of a tip?

Multiply the amount you tip on by the tip percentage and divide by 100. A tip of 18% on a subtotal of 80.00 is 14.40. Choose 15%, 18% or 20%, or type any percentage in the box, and your share of that tip is worked out from your share of the subtotal.

How do you calculate the percentage of a total bill?

Divide your items by the receipt subtotal and multiply by 100. If you had 24.00 of an 80.00 subtotal, your items are 30.0% of the bill. That figure is shown under the result so you can see what share of the tax and tip you carry.

What is a proportional bill split?

It is a split where each person pays in proportion to what they ordered instead of an equal share. Tax and tip are divided by the same proportion, so someone who ordered a small salad does not cover a large steak dinner. This tool works out one person's share of the receipt.

How do you split a bill according to income?

That is a different calculation: the shares come from each person's income, not from a receipt. This tool splits by what you ordered. To divide rent or shared bills by income, use the Fair Share Calculator.