# Tip Calculator

> Calculate gratuity, total bill, and an optional split per person.

Page: https://askcalculators.com/calculator/tip-calculator/
Definition: https://askcalculators.com/calculator/tip-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/tip-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/tip-calculator/?bill=85&tipPercent=20&splitBill=1&people=2

## Inputs
- bill: Bill amount; type=money; required; default=85; min=0
- tax: Tax amount; type=money; optional; min=0
- tipPercent: Tip; type=percent; required; default=20; min=0; max=50
- splitBill: Split the bill; type=checkbox; optional; default=true
- people: Number of people; type=number; required; default=2; min=1; max=100; showWhen=splitBill:true

## Outputs
- perPerson: Per person; format=currency; primary
- tipAmount: Tip amount; format=currency
- totalBill: Total bill; format=currency
- tipPerPerson: Tip per person; format=currency

## Formula
Tip = bill × tip rate; total = bill + tax + tip

The tip is calculated from the bill amount before the optional tax amount.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.