Everyday Life
Tip Calculator
Calculate tip, total bill, and per-person amount for shared payments.
Calculator
Results
- Tip amount$15.57
- Total bill$102.07
- Per person$34.02
Formula
Tip = bill × (tip% ÷ 100); total = bill + tip; per-person = total ÷ split count.
Use this formula with the live inputs above to test scenarios instantly.
Assumptions
- Tax treatment varies by region and is not separately modeled here.
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How this formula works
Tip calculations combine percentage arithmetic with bill splitting. The model first computes gratuity from subtotal, then derives per-person share from the final amount.
This helps groups align quickly on fair contribution amounts while testing different tipping rates. In practice, local norms and tax handling may change the exact amount paid.
References & citation
Use these references when documenting assumptions, and copy the block below when citing this calculator.
- Fuel Economy and Trip Cost Basics
U.S. Department of Energy
Reference background for fuel consumption and cost estimation.
- Restaurant Tipping Guidance
Internal Revenue Service (IRS)
General tip treatment and reporting background.