AA Split Bill Calculator Online

Instantly split group expenses, minimize transfers, all in your browser — free & private.

Try it Free →

Features

🧮

Real-time Calculation

Any change instantly recalculates each person's share and owed amount with no button press needed.

↔️

Minimal Transfer Paths

Greedy debt-simplification algorithm reduces the number of transfers to the absolute minimum.

×½

Half-share Support

Mark any member as half-price (e.g., children or guests) with a single tap — their share is halved automatically.

💰

Paid Deduction

Enter how much each person already paid; the tool calculates who still owes and who overpaid.

📋

One-tap Copy

Copy a neatly formatted bill summary — ready to paste into any group chat.

🖼️

Save as Image

Generate a crisp HiDPI bill card as PNG and download it to share anywhere.

How to Use

1

Enter the total amount

Type the total bill amount and an optional note like 'Team Outing' or 'Dinner'.

2

Add your members

Set the member count with +/- or add rows manually. Edit names, enter amounts already paid, and toggle half-share for anyone who pays less.

3

Review results & share

Instantly see each person's share and the minimal transfer list. Copy the bill text, save a PNG image, or share a link to let others see the full split.

Frequently Asked Questions

What is an AA split bill calculator?
An AA split bill calculator divides a shared expense among a group, accounting for who already paid and how much each person should contribute. It then finds the smallest number of transfers to settle all debts.
Is this tool free to use?
Yes, completely free with no sign-up required.
Is my data private?
All calculations run entirely in your browser. No data is sent to any server unless you explicitly click Share to generate a link.
What does the half-share option do?
Toggling ×½ on a member means they pay half of the per-person unit share — useful for children, guests, or anyone splitting on a discounted basis.
How does floor rounding work?
When enabled, each person's share is rounded down to the nearest cent. The rounding remainder is added to the last member's share so the total always matches exactly.

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