What formulas does this use?

tip amount = bill amount x (tip percent / 100), total = bill amount + tip amount, and per person = total / number of people. For example, a $60 bill with a 20% tip split between 3 people comes to a $12 tip, $72 total, and $24 per person.

Does the tip get split evenly too?

Yes. The tip is added to the bill first to get the total, and then that combined total is divided evenly across everyone, so each person pays an equal share of both the bill and the tip.

How is this different from the Discount Calculator?

The Tip Calculator adds a percentage on top of a bill and splits the result across a number of people. The Discount Calculator instead subtracts a percentage from a price to find savings, and doesn't involve splitting between people.

What if I'm not splitting the bill with anyone else?

Leave the number of people at 1, the per-person amount will simply equal the full total.

Tip Calculator - Tip Amount and Split the Bill

Overview

Introduction

Splitting a restaurant bill fairly, tip included, is a small piece of arithmetic that's easy to get wrong when you're doing it at the table.

This calculator takes the bill amount, the tip percentage, and the number of people splitting it, and instantly shows the tip, the total, and what each person owes.

What Is Tip Calculator?

A calculator that computes a tip amount from a bill and a percentage, adds it to the bill to get a total, and divides that total evenly across a number of people.

It runs entirely client-side as part of this site's Math Tools collection, so nothing you enter is ever uploaded to a server.

How Tip Calculator Works

The tip percentage is divided by 100 and multiplied by the bill amount to get the tip amount, which is added to the bill to get the total, then the total is divided by the number of people.

The calculation happens synchronously in JavaScript the moment you change any input, with no network round trip involved.

When To Use Tip Calculator

Use it at a restaurant, bar, or any service situation where you want to leave a percentage-based tip and know exactly what each person in the group owes.

It's also useful any time you're splitting a shared expense evenly and want a quick, accurate total per person.

Often used alongside Discount Calculator and Percentage Calculator.

Features

Advantages

Shows the tip amount, the total, and the per-person share all at once, not just one of the three.
Instant results as you type, with no submit button or network delay.
Handles any group size, including a party of one, correctly.

Limitations

Only supports splitting the total evenly across everyone, it doesn't handle itemized splits where different people order different amounts.
Relies on standard JavaScript floating-point arithmetic, which is precise enough for everyday use but not intended for high-precision financial computation.

Examples

A 20% tip split three ways

Input

Bill amount: 60, Tip: 20%, Number of people: 3

Output

Tip amount: 12, Total: 72, Per person: 24

60 x (20 / 100) = 12 tip, 60 + 12 = 72 total, and 72 / 3 = 24 per person.

A single diner leaving 18%

Input

Bill amount: 45, Tip: 18%, Number of people: 1

Output

Tip amount: 8.1, Total: 53.1, Per person: 53.1

45 x (18 / 100) = 8.1 tip, 45 + 8.1 = 53.1 total, and with only 1 person the per-person amount equals the total.

Best Practices & Notes

Best Practices

Round the per-person amount up slightly when paying in cash, so the group doesn't come up short after rounding.
For financial calculations involving money, round the final amounts to two decimal places yourself according to your currency's convention.

Developer Notes

Implemented as `tipAmount = billAmount * (tipPercent / 100)`, `total = billAmount + tipAmount`, and `perPerson = total / numberOfPeople` on plain JavaScript numbers, with explicit checks that reject a negative bill amount and a number of people that isn't a positive integer; all display values are rounded to 6 decimal places with trailing zeros trimmed via the shared `trimmedRound` helper.

Tip Calculator Use Cases

Splitting a restaurant or bar bill evenly among a group of friends
Working out how much to tip a delivery driver, stylist, or other service provider from a percentage
Dividing any shared expense, not just a meal, evenly across a known number of people

Common Mistakes

Entering the tip as a decimal fraction like 0.2 instead of the percentage 20.
Forgetting to update the number of people when someone joins or leaves the group, which changes everyone's per-person share.

Tips

If you're subtracting a percentage from a price instead of adding one, use the Discount Calculator.
If you just need the raw 'X% of Y' tip amount without the total or per-person split, the main Percentage Calculator can do that alone.

Tip Calculator