What is the Restaurant Tip and Split Bill Calculator?
This tool calculates a gratuity on a restaurant or bar check, adds it to your bill to get the grand total, and splits that total evenly among any number of people. You can optionally tip only on the pre-tax portion of the check and round the final total up to whole dollars.
How to use it
Enter your Total Bill (the check amount). Choose a Tip % (15, 18, and 20 are common). To split the check, set number of people. Check Do not tip on tax and enter the tax amount if you prefer to tip on the pre-tax subtotal. Check Round total up to dollars to round the grand total up to the next whole dollar.
The formula explained
The tip base is the bill minus tax (when "do not tip on tax" is on), otherwise the full bill. Then:
$$\text{tipTotal} = \text{tipBase} \times \frac{\text{tipPercent}}{100}$$
$$\text{grandTotal} = \text{totalBill} + \text{tipTotal}$$
$$\text{perPerson} = \frac{\text{grandTotal}}{\text{people}}$$
The tax is still part of the total you owe — it is only excluded from the tip math. When rounding up, the grand total is ceilinged and the displayed tip becomes \(\text{grandTotal} - \text{totalBill}\).
Worked example
A $50.00 bill at 18% split between 2 people: tip = \(50 \times 0.18 = \$9.00\), grand total = $59.00, each person pays $29.50.
$$\text{tip} = 50 \times 0.18 = \$9.00$$ $$\text{grandTotal} = 50.00 + 9.00 = \$59.00$$ $$\text{perPerson} = \frac{59.00}{2} = \$29.50$$
FAQ
How much should I tip? For sit-down service, 15–20% is typical in the US; 20% is the common default for good service.
How do I tip in my head? For 20%, move the decimal one place left then double (e.g. $50 → $5 → $10). For 15%, take 10% plus half of that.
Does the tip include tax? Only if you leave "do not tip on tax" unchecked. Check it to tip on the pre-tax amount.
