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Ubify Financial Advisory Board
FINANCIAL ANALYSTS & CPA REVIEWERS
About This Tool
Calculating restaurant gratuity and splitting group checks ensures fair tipping without mental arithmetic errors.
### Mathematical Formula Gratuity and bill sharing are calculated as: $$\text{Tip Amount} = \text{Bill Total} \times \left( \frac{\text{Tip Percentage}}{100} \right)$$ $$\text{Total Bill} = \text{Bill Total} + \text{Tip Amount}$$ $$\text{Total Per Person} = \frac{\text{Total Bill}}{\text{Number of People}}$$ $$\text{Tip Per Person} = \frac{\text{Tip Amount}}{\text{Number of People}}$$
### Worked Numeric Example A dining check for two people totals $85.00 with an 18% gratuity rate selected: 1. Tip Amount: $85.00 * 0.18 = **$15.30**. 2. Total Bill with Tip: $85.00 + $15.30 = **$100.30**. 3. Splitting evenly between 2 diners equals **$50.15 per person** ($42.50 base food + $7.65 gratuity per person).
How to Use
- 1
Enter the pre-tip subtotal into the Bill Total ($) field (default: 85.00).
- 2
Select a preset tip percentage (10%, 15%, 18%, 20%, 25%) or enter a custom rate.
- 3
Specify the dining party size under Number of People (default: 2).
- 4
Review the itemized Tip Amount, Total Bill, Total Per Person, and Tip Per Person results.
Frequently Asked Questions
What is standard dining tip etiquette in the United States?
Standard full-service restaurant tipping in the US typically ranges from 15% to 20% of the pre-tax bill, with 18% representing customary service.
Should gratuity be calculated on the pre-tax subtotal or the post-tax bill?
Etiquette standards recommend tipping on the pre-tax food and beverage subtotal, though many receipts display tip suggestions calculated on the post-tax total.
Is dining check or billing information uploaded to cloud servers?
No. All calculations run strictly in client-side browser memory with zero network data transmission or personal tracking.