Bill Split Calculator

Easily divide restaurant checks, shared expenses, and group tips.

Total Tip: $0.00

Grand Total: $0.00

Each Person Pays: $0.00

How the Bill Split Calculator Works

Dividing a check at a restaurant or sharing household expenses doesn't have to be complicated. Our Bill Split Calculator helps you determine exactly how much each individual owes, including tax and tips, in seconds. This tool is ideal for dinner parties, roommate expenses, or group travel.

The Math Behind the Split

To calculate the split manually, we use the following formulas:

• Total Tip: Bill Amount × (Tip Percentage ÷ 100)
• Grand Total: Bill Amount + Total Tip
• Amount Per Person: Grand Total ÷ Number of People

Real-World Example

Imagine a group of 4 friends goes out for dinner. The total bill comes to $120.00. The group decides to leave a 18% tip.

1. Tip Calculation: $120.00 × 0.18 = $21.60
2. Grand Total: $120.00 + $21.60 = $141.60
3. Split: $141.60 ÷ 4 = $35.40 per person

Frequently Asked Questions

Should I tip on the pre-tax or post-tax amount?

Most etiquette experts suggest tipping on the pre-tax total, but many people find it easier to calculate based on the final bill. Our calculator uses the amount you enter, so simply enter your preferred base figure.

How do I handle rounding errors?

When a bill doesn't divide perfectly (e.g., $10 / 3 = $3.333…), one person may need to pay an extra cent. Our calculator rounds to the nearest two decimal places for standard currency representation.

function calculateBillSplit() { var bill = parseFloat(document.getElementById("totalBill").value); var people = parseInt(document.getElementById("numPeople").value); var tipPercent = parseFloat(document.getElementById("tipPercentage").value); // Validation if (isNaN(bill) || bill <= 0) { alert("Please enter a valid bill amount."); return; } if (isNaN(people) || people <= 0) { alert("Please enter the number of people (minimum 1)."); return; } if (isNaN(tipPercent) || tipPercent < 0) { tipPercent = 0; } // Calculation Logic var totalTip = bill * (tipPercent / 100); var grandTotal = bill + totalTip; var perPerson = grandTotal / people; // Display Results document.getElementById("displayTip").innerHTML = "$" + totalTip.toFixed(2); document.getElementById("displayGrandTotal").innerHTML = "$" + grandTotal.toFixed(2); document.getElementById("displayPerPerson").innerHTML = "$" + perPerson.toFixed(2); // Show the result container document.getElementById("billResult").style.display = "block"; }