Tip & Split Bill Calculator
Calculate tip, group total, and per-person amount with explicit subtotal or after-tax basis and optional upward rounding.
Interactive calculator · Method TIP_SPLIT-1.1 · Last reviewed: 2026-11-04
Enter your scenario
Results update as valid inputs change. Correct any highlighted field before relying on the answer.
Your inputs
Default worked example. Edit the inputs to calculate your scenario.
Default worked example
A 20% tip produces $17.28 in tip and $36.86 per person for 3 people.
How to use the calculator
Enter bill subtotal and tax in whole USD cents, a tip percentage and a whole person count. Choose whether the tip uses subtotal or subtotal plus tax. Select nearest-cent shares or round each share upward to a nickel or dollar.
What the result means
Group total is what equal payments collect. A negative rounding adjustment leaves an amount uncollected; a positive adjustment collects extra. Nearest-cent shares can round either way. Upward nickel/dollar modes round each share, not the final group total.
Formula and units
Tip = half-up cents(selected basis × tip%/100). Amount due = subtotal + tax + rounded tip. Each share rounds amount due divided by people under the selected policy. Group total = share × people. Rounding adjustment = group total − amount due. Effective tip on subtotal = rounded tip/subtotal × 100; it is unavailable when subtotal is zero.
Worked examples
Bill subtotal: 86.4 USD; Tax already on bill: 6.91 USD: Bill subtotal: 86.4 USD; Tax already on bill: 6.91 USD; Tip percentage: 20 %; People splitting bill: 3 people; Tip basis: subtotal; Per-person rounding: exact.
Example result: Each person pays: $36.86; Tip amount: $17.28; Group total: $110.58; Rounding adjustment: -$0.01; Effective tip on subtotal: 20%; People: 3.
Bill subtotal: 129.6 USD; Tax already on bill: 10.37 USD: Bill subtotal: 129.6 USD; Tax already on bill: 10.37 USD; Tip percentage: 30 %; People splitting bill: 3 people; Tip basis: subtotalAndTax; Per-person rounding: exact.
Example result: Each person pays: $60.65; Tip amount: $41.99; Group total: $181.95; Rounding adjustment: -$0.01; Effective tip on subtotal: 32.4%; People: 3.
Limitations and common mistakes
The entered tax amount and chosen tip basis are assumptions. Preset percentages are examples. This equal-share model does not assign different bills or distribute leftover cents among selected people.
Keep the entered tip percentage separate from its effective rate on subtotal. Tax-inclusive tipping and cent rounding can make those rates differ. Check the adjustment when collecting equal payments.
Sources and assumptions
The result uses arithmetic and visitor-entered values; preset percentages are examples rather than etiquette claims.
Method TIP_SPLIT-1.1; last formula review 2026-11-04. Sources and their supported claims. Calculation methodology.