How Tip Calculator Works & Mathematical Formula
Calculate tip amount, total bill with tip, and split evenly per person at restaurants. Our online engine computes high-precision results in real-time right in your browser without transmitting your personal information over external servers.
Standard Mathematical Formula:
$$\text{Tip} = \text{Bill} \times \left(\frac{\text{Tip \%}}{100}\right), \quad \text{Per Person} = \frac{\text{Bill} + \text{Tip}}{\text{People}}$$
Step-by-Step Calculation Example
For an $85.50 bill with an 18% tip split among 3 people: Tip = $15.39. Total Bill = $100.89. Each person pays $33.63 ($5.13 tip each).
Frequently Asked Questions
What is the standard tip percentage at restaurants?
In the US and Canada, standard restaurant tipping is typically 15% for fair service, 18% for good service, and 20% or more for excellent service.
Do you calculate tip before or after sales tax?
Standard etiquette suggests calculating the tip on the pre-tax bill subtotal, although many patrons tip on the final total for convenience.