Everyday Life
Itemized Bill Splitter
Split items among specific diners/payers with proportional tax and tip calculations.
Inputs
Diners / People
Items List
Results
Grand Total
$0.00
How It Works
The itemized bill splitter distributes item costs directly to the diners associated with them. The subtotal of each diner is calculated. Proportional shares of tax and tip are then applied: $\text{Total}_P = \text{Subtotal}_P \times (1 + \frac{\text{Tax}\%}{100} + \frac{\text{Tip}\%}{100})$. This guarantees that each payer covers exactly their items plus their fair, percentage-weighted share of tax and tips.
Formula Used
Diner Total = Diner Items Subtotal × (1 + Tax Rate % / 100 + Tip Rate % / 100)
To split an itemized bill, each person's individual items are summed. Their final share is calculated by adding the percentage-weighted tax and tip to their subtotal, ensuring they pay for what they consumed plus their proportional tax/tip.
Worked Example
Here is a step-by-step example of how these values are calculated:
Tax
8.25%
Tip
18%
Diners
Alice, Bob
Items
Appetizer ($10, split), Burger ($15, Alice)
Result: Alice Subtotal: `$20.00`, Bob Subtotal: `$5.00`. Total Multiplier: `1.2625`. Alice Total: `$25.25`, Bob Total: `$6.31`.
Frequently Asked Questions
What happens if an item's payer name is not listed in the Diners list?
The splitter automatically detects the name and appends them dynamically as a separate payer to the list of breakdown summaries, so you don't lose the calculation.
Is tip calculated on subtotal or tax-inclusive total?
This calculator applies tax and tip additively based on the subtotal. This is the mathematically correct way to calculate tips under standard guidelines, ensuring diners do not pay gratuity on government taxes.