Split Bill Calculator
Free bill splitting calculator with 5 modes: equal split, itemized bills, percentage-based division, rent fairness, and debt simplification.
How It Works
Per Person = (Bill + Tax + Tip) ÷ PeopleThe total bill is the sum of the subtotal, tax (subtotal × tax%), and tip (base × tip%). Divide by the number of people for an equal split. For itemized splits, each person pays for their ordered items plus proportional tax and tip.
Quick Tips
US Tipping
Standard restaurant tip in the US is 15-20% of the pre-tax amount.
Rent Fairness
Private bathrooms add ~15% value; window views add ~5% to a room's fair rent.
Debt Simplification
Our algorithm minimizes the number of transactions needed to settle group debts.
Tip on Tax
Most people tip on the pre-tax subtotal, but you can toggle tip-on-total in the calculator.
Step-by-Step Instructions
- 1Choose your splitting mode: Equal, Itemized, Percentage, Rent, or Debt Tracker.
- 2Enter the bill amount, number of people, and tip/tax percentages.
- 3For itemized mode, add items and assign them to specific people.
- 4For rent mode, enter room details and amenities for fair division.
- 5View instant results with per-person breakdowns and save for later.
Frequently Asked Questions
How do you split a bill fairly?▼
For equal splits, divide total + tip by the number of people. For itemized bills, each person pays for their items plus proportional tax and tip. Our calculator handles both automatically.
Should tip be calculated before or after tax?▼
Tipping etiquette varies. In the US, tip is typically calculated on the pre-tax amount (15-20%), but many people tip on the total. Our calculator lets you toggle this.
How do you split rent fairly between roommates?▼
Use a fairness algorithm that accounts for room size, amenities (private bathroom, closet space, windows), and parking. Our calculator uses the NYT methodology.
What is debt simplification?▼
When multiple people owe each other, debt simplification minimizes the number of transactions. Instead of everyone paying everyone, it calculates net balances and matches debtors to creditors.
How do you split bills with unequal incomes?▼
Percentage-based splits proportional to income (earn 2x = pay 2x) are mathematically fair and reduce resentment. Use the Percentage mode for this.
Is my data stored anywhere?▼
No. All calculations happen in your browser. Split history is saved locally in your browser's localStorage and never sent to any server.