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Tip Calculator

Work out the tip and total for a bill, split it between any number of people, and optionally round each share up.

Level: Grade 7

  • Common Core standard 7.RP.A.3Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.
Printable worksheet

Tip Calculator

Know the answer you need? Pick an input to work backward.

Inputs

Optional. Enter the tax shown on the receipt to tip on the pre-tax amount.

Result

Each person pays

$49.86

Split 2 ways, each person pays $49.86 (total $99.71).

Tip amount
$15.21
Total with tip
$99.71
Tip per person
$7.61

See the step-by-step solution ↓

Common tip percentages on this bill
Common tip percentages on this bill
TipTip amountTotalPer person
10%$8.45$92.95$46.48
15%$12.68$97.18$48.59
18%$15.21$99.71$49.86
20%$16.90$101.40$50.70
22%$18.59$103.09$51.55
25%$21.13$105.63$52.81

Step-by-step solution

  1. Work out the tip: the bill times the tip percentage

    $84.50×18%=$15.21

  2. Add the tip to the full bill

    $84.50+$15.21=$99.71

  3. Split the total evenly between 2 people

    $99.712=$49.86

  4. Divide the tip by the number of people to see each person's part of it

    $15.212=$7.61

Test yourself

20 quick questions built from this calculator's formula: work out results, predict what happens when an input changes, and work backward from an answer. Every answer comes with the working.

Please note: Results are estimates for planning and comparison. Lenders, banks, and tax authorities may round differently or include fees not modeled here, so confirm figures with your provider before deciding.

What this calculator does

Find out how much to tip, what the total comes to, and what each person pays when you split the bill. Enter the bill, the tip percent and the number of people. You'll see what each person owes, the tip, each person's part of the tip and the total. You can tip on the amount before tax by entering the tax from the receipt. You can also compare common tip rates side by side, and round each share up to a whole dollar.

A tip is a percentage of the bill you add on top for the service. The math isn't hard. But it gets fiddly at the end of a meal, when the bill is split several ways and nobody wants to deal with odd cents.

Where it's used

Why this math matters outside the classroom:

  • Restaurant tips. A 20% tip on a $65 bill is $13, for a total of $78.
  • Splitting the bill. Four diners sharing that $78 total each pay $19.50.
  • Rounding up. Rounding each share up to the next whole dollar makes paying in cash easier.
  • Services. Customers work out a 15% tip on a $40 haircut, which is $6.

Grade level and standards: Grade 7; Common Core State Standards for Mathematics 7.RP.A.3. © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

How to use it

  1. Enter the bill amount. To tip on the amount before tax, also enter the tax shown on the receipt.
  2. Enter the tip percentage and the number of people sharing the bill.
  3. If you like, tick the box to round each person's share up to the next whole dollar. The tip and total change to match. You'll also see the effective tip, the percent you really end up tipping.
  4. Open the table under the results to compare the tip, total and share at 10%, 15%, 18%, 20%, 22% and 25%.

What the inputs mean

Bill amount
The full amount on the receipt, including any tax.
Tax included in the bill (optional)
Optional. The sales tax on the receipt. If you enter it, the tip is worked out on the bill minus the tax. Everyone still pays the full bill plus the tip. Leave it blank to tip on the whole bill.
Tip
Anything from 0% to 100%.
Number of people
How many people are splitting the bill equally, from 1 to 1,000.
Round each person's share up to the next whole dollar
Rounds each share up to a whole dollar. The extra cents go to the tip, so the tip you really leave ends up a little higher than the percent you entered.

Formula and method

tip = (bill − tax) × tip% ÷ 100
total = bill + tip
per person = total ÷ people
with rounding: per person = next whole dollar at or above (total ÷ people); tip = per person × people − bill

In the formulas, tip% is the tip percentage you enter, and tax is the optional tax from the receipt. The tip is that percentage of the bill, or of the bill minus tax if you enter the tax. Each person's share is the total split evenly. The tip per person is the tip split the same way.

When rounding is on, each share is first rounded to the nearest cent. Then it's rounded up to the next whole dollar. Whatever the group pays beyond the bill counts as the tip. So the tip and effective percent are worked out again from the rounded shares.

Worked example

Two people split an $84.50 bill and want to leave an 18% tip.

  1. Tip: $84.50 × 18 ÷ 100 = $15.21.
  2. Total: $84.50 + $15.21 = $99.71.
  3. Each share: $99.71 ÷ 2 = $49.855, about $49.86.
  4. With rounding on, each person pays $50.00. The group pays $100.00, so the tip becomes $15.50. That's about 18.3% of the bill.

Result: Each person pays about $49.86 (including about $7.61 of tip), or a flat $50.00 with rounding. Now say the $84.50 included $6.50 of tax, and you tip on the $78.00 before tax. Then the tip is $14.04, and each person pays $49.27.

Understanding the result

Shares that aren't rounded can include part of a cent, such as $49.855. In real life, someone pays a cent more. Rounding up to whole dollars avoids the problem.

The effective tip after rounding is the percent of the bill you really tipped, once the extra cents are counted.

Assumptions and limitations

  • The bill is split evenly. The calculator doesn't split separate items per person.
  • The tip is worked out on the bill, or on the bill minus the tax you enter. No tax is added.
  • Usual tip rates vary by country, region and type of service. The calculator doesn't suggest a rate.
  • It can't tell if a service charge is already on the bill. Check the receipt before adding a tip.
  • Rounding always goes up to a whole dollar. Other rounding choices aren't offered.

Frequently asked questions

Should I tip on the amount before or after tax?

Both are common. Tipping on the amount before tax gives a slightly smaller tip. Tipping on the total is easier to read off the receipt. To tip before tax, enter the tax from the receipt in the optional tax box.

What is an easy way to estimate a tip without a calculator?

Find 10% by moving the decimal point one place to the left. Then scale it up or down. For $84.50, 10% is about $8.45. So 20% is about $16.90, and 15% is about $12.68.

Why is my effective tip higher than the percent I entered?

Rounding each share up to the next dollar adds a little extra to every share, and that extra goes to the tip. The more people splitting the bill, the bigger the difference can be.

How much is a 20% tip on $50?

$10, for a total of $60. Find 10% ($5) and double it. For other amounts, enter the bill and open the table to see 10% through 25% at once.

Do I tip on the full price when I use a coupon or gift card?

Many people tip on the price before the discount, since the service was the same. To do that, enter the bill as it was before the discount. A gift card is a way of paying, so it doesn't change the bill the tip is based on.

How do I split a bill unevenly?

First work out each person's part of the bill. Then run the calculator once for each person, with the number of people set to 1. That way, everyone tips at the same rate on what they ordered.

How this calculator is checked

Method: Percentage of an amount; even division; ceiling rounding of each share when selected. The calculation is covered by automated tests with known reference values and edge cases. Last updated 2026-10-18. Found a problem? Tell us.

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