Split Bill Calculator - Free Online Tool

Split any bill equally, by name, or item-by-item with tip and tax

Whether you are settling a restaurant check after a group dinner, splitting a vacation rental with friends, or dividing shared household expenses among roommates, the Split Bill Calculator makes the math instant and fair. Instead of fumbling with mental arithmetic or passing your phone around the table, you can enter the total, choose how to split it, add a tip percentage and any taxes or fees, and get the exact amount each person owes in seconds. The calculator offers three distinct modes to match how you actually share costs. Simple Split handles the most common scenario: a single bill amount divided evenly among a set number of people, with tip, tax, optional service fees, and a discount field. Just enter the total, pick the number of people, adjust the tip with quick preset buttons for 10%, 15%, 18%, 20%, and 25%, and the per-person share appears instantly. A rounding option lets you round each person's contribution up to the nearest dollar so payment is convenient and the surplus is clearly shown. By Name mode adds participant-level detail. You create a named list of everyone in the group, then choose equal or unequal splitting. Equal mode works like Simple Split but displays each person's name next to their share. Unequal mode lets you enter a custom amount for each person, which is useful when some people ordered significantly more expensive items and you want to reflect that fairly without going through every line item. Any remainder or overage is shown clearly so the group can decide how to handle it. A visual horizontal bar chart shows each person's share as a proportion of the total, and a donut chart gives an at-a-glance breakdown. A debt minimization summary shows the fewest transactions needed to settle all balances. By Item mode is the most precise option for complex group meals. You list every item on the bill — name, price, and quantity — then assign each item to the specific people who ordered or consumed it. Unassigned items are automatically shared among everyone. Tip, tax, fees, and discounts are then distributed proportionally based on each person's share of the item subtotal. This eliminates the common problem of vegetarians subsidizing expensive steak orders, or non-drinkers paying for bottles of wine. The per-person breakdown shows exactly what contributed to each share: item cost, tip allocation, tax allocation, and any fee or discount adjustments. All three modes support a customizable currency symbol (default $), with results available in a downloadable CSV file or via your browser's print function for a clean printed record. No account, registration, or server connection is required — all calculations happen instantly in your browser and no data is ever stored or transmitted.

Understanding Bill Splitting

What Is Bill Splitting?

Bill splitting is the practice of dividing a shared expense among multiple people. It is most common at restaurants, where a group dining together needs to determine how much each person owes from a single check. The challenge is that a fair split depends on context: equal division works when everyone ordered similarly priced items, while item-by-item splitting is more equitable when consumption varied significantly. Beyond restaurants, bill splitting applies to vacation rentals, shared subscriptions, group gifts, road-trip fuel costs, and any other scenario where multiple people share a single expense. The core math is straightforward — divide the total by the number of people — but the complications arise with tip, tax, service fees, discounts, and unequal contributions.

How Is the Split Calculated?

The basic equal split formula is: Grand Total / Number of People = Each Person's Share. The Grand Total is computed as: Bill Subtotal + Tip Amount + Tax + Service Fees − Discount. Tip Amount is calculated as: Bill Subtotal × (Tip Percentage / 100). For item-by-item splitting, each person's share of the subtotal is the sum of their assigned items. Tip, tax, and fees are then distributed proportionally: a person who consumed 30% of the item subtotal pays 30% of the tip, 30% of the tax, and 30% of the fees. Discounts are similarly deducted proportionally. The rounding option applies Math.ceil() to each person's exact share and computes the surplus as: (Rounded Share × Number of People) − Grand Total. Debt minimization uses a greedy algorithm that matches the largest debtor to the largest creditor repeatedly until all balances reach zero.

Why Fair Splitting Matters

Unfair bill splitting creates social friction and can strain friendships and relationships. Research on social dynamics consistently shows that perceived unfairness in financial interactions damages trust more than the actual monetary amount involved. When one person consistently pays more than their fair share — even by small amounts — resentment can build over time. Conversely, clearly showing each person exactly what they owe and why eliminates ambiguity and defensiveness. Item-by-item splitting is particularly valuable in groups with dietary restrictions, budget constraints, or alcohol preferences that create significant cost differences. Using a transparent calculator that everyone can see removes the uncomfortable dynamic of one person doing the math privately and announcing results.

Tips and Limitations

Tipping customs vary significantly by country and service type. In the United States, 15–20% is standard for sit-down restaurant service, while 18–22% is common in cities with higher costs of living. Tipping on pre-tax versus post-tax amounts is a matter of personal preference; this calculator tips on the pre-tax bill amount by default. For international travel, many countries include service charges in the bill automatically, so adding an additional tip may be unnecessary or even considered inappropriate. Sales tax rates vary by state and locality in the US (ranging from 0% to over 10%) and by country internationally. When using the By Item mode, items with no assignment are split evenly among all participants — always verify assignments are correct before sharing results. The debt minimization algorithm provides the theoretical minimum number of transactions but assumes all parties are equally willing to pay any counterparty.

Bill Splitting Formulas

Equal Split Per Person

Per Person = (Bill + Tip + Tax + Fees − Discount) ÷ Number of People

Divides the grand total evenly among all participants. The tip is calculated as Bill × (Tip% ÷ 100) on the pre-tax subtotal.

Tip Per Person

Tip Per Person = (Bill × Tip% ÷ 100) ÷ Number of People

Each person's share of the tip when splitting equally. Useful for confirming the tip portion of your individual payment.

Proportional Split (By Item)

Person's Share = (Person's Items ÷ Items Subtotal) × Grand Total

For unequal splits, each person pays a proportion of the grand total equal to their share of the item subtotal. Tip, tax, and fees distribute proportionally.

Rounded Split with Surplus

Rounded Share = ⌈Exact Share⌉; Surplus = (Rounded × People) − Grand Total

Rounds each share up to the nearest whole dollar for convenience. The small surplus is shown so the group can decide who keeps the change.

Tipping & Splitting Reference Tables

Tipping Etiquette by Country

Tipping customs vary widely around the world. Use this guide when dining internationally.

Country / Region	Standard Tip	Notes
United States	15–20%	Expected at sit-down restaurants; 18–22% in cities
Canada	15–20%	Similar to US; tip on pre-tax amount
United Kingdom	10–15%	Optional; check if service charge is included
France	5–10%	Service included (service compris); small extra appreciated
Germany	5–10%	Round up the bill; not obligatory
Italy	5–10%	Coperto (cover charge) often included; small tip optional
Japan	0%	Tipping is not customary and can be considered rude
Australia	0–10%	Not expected; appreciated for exceptional service
China	0%	Not customary; may be refused
Brazil	10%	Usually included as service charge on the bill

Quick Split Reference — Common Bill Amounts

Pre-calculated per-person amounts for common bills with 18% tip, split equally.

Bill Amount	Tip (18%)	Grand Total	2 People	3 People	4 People	6 People
$50	$9.00	$59.00	$29.50	$19.67	$14.75	$9.83
$75	$13.50	$88.50	$44.25	$29.50	$22.13	$14.75
$100	$18.00	$118.00	$59.00	$39.33	$29.50	$19.67
$150	$27.00	$177.00	$88.50	$59.00	$44.25	$29.50
$200	$36.00	$236.00	$118.00	$78.67	$59.00	$39.33
$300	$54.00	$354.00	$177.00	$118.00	$88.50	$59.00

Worked Examples

Split a $120 Dinner with 20% Tip Among 4 People

Four friends share a restaurant bill of $120.00. They agree on a 20% tip and no additional tax or fees.

Calculate the tip: $120.00 × 20% = $24.00

Calculate the grand total: $120.00 + $24.00 = $144.00

Divide equally: $144.00 ÷ 4 = $36.00 per person

Each person's tip portion: $24.00 ÷ 4 = $6.00

Each person pays $36.00, which includes $30.00 for food and $6.00 for the tip.

Unequal Split Based on Individual Orders

Three colleagues dine together. Alice's items total $45, Bob's total $30, and Carol's total $15. The bill subtotal is $90 with an 18% tip.

Calculate the tip: $90.00 × 18% = $16.20. Grand total: $106.20

Alice's proportion: $45 ÷ $90 = 50% → $106.20 × 0.50 = $53.10

Bob's proportion: $30 ÷ $90 = 33.3% → $106.20 × 0.333 = $35.40

Carol's proportion: $15 ÷ $90 = 16.7% → $106.20 × 0.167 = $17.70

Alice pays $53.10, Bob pays $35.40, and Carol pays $17.70. Tip and tax distribute proportionally to each person's consumption.

How to Use the Split Bill Calculator

Choose Your Split Mode

Select Simple Split for a quick equal division by number of people, By Name to list participants individually with equal or custom amounts, or By Item for precise itemized splitting where each item is assigned to specific people.

Enter the Bill and Adjustments

Type in the bill amount, then set the tip percentage using the quick-select preset buttons (10%, 15%, 18%, 20%, 25%) or enter a custom value. Add tax, service fees, or discounts in the optional fields below — all are included in the calculation automatically.

Review the Per-Person Breakdown

Results appear instantly as you type. The main result shows each person's share. The bar chart and donut chart visualize proportional contributions. In By Name mode, a settlement summary shows the minimum transactions needed to settle all balances if amounts differ.

Export or Print Your Results

Click Export CSV to download a spreadsheet of the split for record-keeping, or click Print to get a clean printed copy to leave with the receipt. No signup is required and no data is saved — everything stays in your browser.

Frequently Asked Questions

Should I tip on the pre-tax or post-tax amount?

Tipping etiquette varies, but most US restaurant guides recommend tipping on the pre-tax subtotal. This calculator tips on the pre-tax bill amount by default, which is the most widely accepted standard. Some people prefer to tip on the total including tax as a slightly more generous gesture. The difference is usually small — on a $100 bill with 8% tax, tipping 20% on pre-tax means $20 versus $21.60 on the post-tax total. Either approach is socially acceptable, so choose whichever feels right for the level of service you received.

What tip percentage should I leave?

In the United States, the standard tip for sit-down restaurant service is 15–20%, with 18% being a common default on many restaurant receipt prompts. Higher-end restaurants and metropolitan cities often see 20–22% as the new standard. For exceptional service, 25% or more is appropriate. For counter service and coffee shops, 10–15% is typical. For food delivery, $3–5 or 15–20% of the order total is customary. Outside the US, tipping customs vary widely — many European countries include a service charge automatically, and tipping in Japan is considered unnecessary or even rude. Always check local customs when traveling.

How does the debt minimization algorithm work?

The debt minimization algorithm in By Name mode calculates the minimum number of transactions needed to settle all balances. It works by computing each person's net balance (what they should pay versus what was recorded). Participants with positive balances are owed money; those with negative balances owe money. The algorithm then greedily pairs the largest debtor with the largest creditor, transferring as much as possible in a single transaction, until all balances reach zero. This often reduces, say, six separate payments to just two or three transfers, making settlement much simpler for the group.

What happens to unassigned items in By Item mode?

In By Item mode, any line item where you have not checked any participant checkboxes is automatically treated as shared equally among all participants. This is a sensible default for shared items like appetizers, bread, or bottles of wine that the whole table enjoyed. If you want to exclude specific people from an item, simply check only the checkboxes of those who consumed it. Tip, tax, service fees, and discounts are always distributed proportionally based on each person's share of the assigned item subtotals.

Can I use this calculator for non-restaurant expenses?

Absolutely. The Split Bill Calculator works for any shared expense: vacation rental costs split among a travel group, utility bills divided among roommates, group gift contributions, road-trip fuel and accommodation costs, shared grocery orders, or team lunches at work. The tip field can be left at zero for non-restaurant scenarios. The fee field is useful for service charges like delivery or booking fees. The discount field handles promo codes or group discounts. For ongoing shared living expenses, By Name mode with custom amounts gives each person a clear record of what they owe and why.

Is there a limit to how many people or items I can add?

There is no hard limit built into the calculator. You can add as many participants and line items as you need. However, for very large groups or very long receipts, the By Item mode with full assignment can become time-consuming to fill in. A practical approach for large groups is to use Simple Split or By Name mode with custom amounts based on rough estimates of individual consumption, rather than itemizing every dish. The calculator is optimized for the most common scenario of 2–12 people sharing a single check, but it will handle larger groups equally well.