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Split the bill without the awkward math. Our free tip calculator figures out the tip, the total, and everyone’s share in seconds — perfect for restaurants, food delivery, taxis, and group outings. No sign-up required.
Our free Tip Calculator works out exactly how much to tip, what the total bill comes to, and what each person owes when you split it. No more awkward phone-math at the table – enter three numbers and get three answers instantly.
Tips for best results: always tip on the pre-tax subtotal, not the after-tax total – on a $100 meal with 8% tax, that distinction alone is worth $1.44 at an 18% rate. Check whether an auto-gratuity (usually 18-20% for parties of 6+) is already on the bill before adding more. And when splitting, round each person’s share up to the nearest dollar rather than down, so the group never comes up short.
A tip (also called a gratuity) is a voluntary payment added to a service bill as a reward for good service. In the United States, tipping is not truly optional in practice – servers, bartenders, delivery drivers, and many other service workers earn a significant share of their income from tips, with the federal tipped minimum wage far below the standard minimum. Understanding the math behind tipping means you always pay fairly without overthinking it.
Three numbers drive every tipping calculation. The bill subtotal is the pre-tax cost of food and drinks. The tip rate is the percentage you choose to give, expressed as a decimal in calculations (18% becomes 0.18). The party size is the number of people sharing the bill. From these, everything follows: tip amount = subtotal x rate, total = subtotal + tip, and per-person share = total / party size. That is the entire mathematics of tipping – three multiplications at most.
Tipping norms vary by situation and country. At US sit-down restaurants, 15% is the standard floor for adequate service, 18% rewards good service, and 20%+ recognizes excellent service. Bars: $1-2 per drink or 15-20% of the tab. Food delivery: 15-20% with a $3-5 minimum. Takeout: 10% is a kind gesture though not required. Coffee shops: spare change or $1. Outside the US, customs differ wildly – many European countries include service in the bill, and in Japan tipping can actually offend. When traveling, check local norms before applying American percentages abroad.
The pre-tax question deserves emphasis because it is the most common point of confusion. Restaurant receipts show a subtotal, then tax, then a total. Etiquette says to tip on the pre-tax subtotal – the tax is money you pay the government, not the restaurant, and servers did not serve it. On a $100 subtotal with 8% tax ($108 total), an 18% tip is $18.00 on the subtotal versus $19.44 on the total. Our calculator asks for the subtotal precisely so the math follows proper etiquette automatically.
Tipping math is percentage math, and it follows three clean formulas. Convert the tip percentage to a decimal first by dividing by 100 (18% = 0.18).
Tip amount = bill subtotal x tip rate. Total bill = bill subtotal + tip amount. Per-person share = total bill / number of people. Round money results to the nearest cent, and when splitting, round each share up to a comfortable payment amount.
Worked Example 1: An $86.40 bill, 18% tip, split among 5 people. Tip = 86.40 x 0.18 = 15.552, which rounds to $15.55. Total = 86.40 + 15.55 = $101.95. Per person = 101.95 / 5 = $20.39. Each of the five diners pays $20.39 – clean, exact, and fair.
Worked Example 2: A $124.50 bill, 20% tip, 2 people. Tip = 124.50 x 0.20 = $24.90. Total = 124.50 + 24.90 = $149.40. Per person = 149.40 / 2 = $74.70. Notice how the 20% rate is trivially easy to compute mentally (just double 10%), which is one reason it is popular for excellent service.
A handy mental shortcut: 10% of any bill is just the decimal point moved one place left ($86.40 -> $8.64). Double it for 20%, add half again for 15%, and for 18% compute 20% then subtract a little. Our calculator does the exact arithmetic, but the shortcut lets you sanity-check any result in seconds.
Six friends finish dinner and the bill arrives: $184.75 subtotal. The service was great, so they agree on 18%. What does everyone owe?
Tip = 184.75 x 0.18 = 33.255, which rounds to $33.26. Total = 184.75 + 33.26 = $218.01. Per person = 218.01 / 6 = 36.335, which rounds to $36.34.
Here is where groups go wrong without a calculator: someone suggests everyone throw in $36. Six times $36 is $216 – the group comes up $2.01 short, and the shortfall lands on whoever pays the bill. With exact math, each person pays $36.34 (or rounds up to $37, covering the tip generously). The difference between guessing and calculating is the difference between an awkward Venmo request later and a clean exit now.
Pro move for groups: one person pays the whole $218.01 on their card (earning the credit-card points), and the other five send $36.34 each. Everyone pays the exact fair share, and the payer is made whole to the cent.
You order delivery on a rainy night: $42.80 in food. The driver braved the weather, so you want to tip 15%. What is the total?
Tip = 42.80 x 0.15 = $6.42. Total = 42.80 + 6.42 = $49.22. Simple – but delivery tipping has its own rules worth knowing.
For delivery, 15-20% with a $3-5 minimum is the standard, because drivers cover their own gas and vehicle wear. On small orders the percentage alone can be insultingly low – 15% of a $12 order is $1.80, so bump it to at least $3-5. In bad weather, at night, or for large/complicated orders, go to 20%+. And tip on the food subtotal, not including delivery fees (which go to the app, not the driver). Our calculator handles the percentage math; your judgment handles the rest.
1. Tipping on the post-tax total. The single most common error. Tax is not service – tip on the pre-tax subtotal. On a $150 meal with 8% tax, tipping 20% on the $162 total instead of the $150 subtotal costs you an extra $2.40 for no reason. Always find the subtotal line on the receipt.
2. Double-tipping on auto-gratuity. Many restaurants add an automatic 18-20% gratuity for parties of 6 or more, and it is printed right on the bill – sometimes subtly. Adding your own 20% on top means the server gets 40% and you overpay significantly. Always scan the bill for service charges before tipping.
3. Rounding each person’s share down. When six people owe $36.34 each, rounding down to $36 leaves the bill $2.04 short. Round up to $37 instead – the extra cents are a slightly bigger tip, and nobody has to cover a shortfall. Pennies of generosity beat dollars of awkwardness.
4. Punishing the server for kitchen problems. Slow food, wrong orders, and cold dishes are usually the kitchen’s fault, not your server’s. If the server communicated well and tried to fix it, tip normally and complain to the manager instead. Stiffing the server for the cook’s mistake punishes the wrong person.
5. Undertipping delivery and takeout. Delivery drivers pay for gas, insurance, and car maintenance out of their earnings – 10% on a delivery order is effectively a pay cut after expenses. Use 15-20% with a $3-5 floor. For takeout, 10% is a fair acknowledgment of the packaging and handling work.
Keep the math going after the meal. Our Percentage Calculator handles discounts, taxes, and any percent change; the Date Calculator counts trip days for per-day budget splits; the Fraction Calculator divides shared costs expressed as fractions; the BMR Calculator estimates your daily calorie needs after that big dinner; and the Scientific Calculator tackles any complex expression.
In the US, 15% is the standard for adequate sit-down service, 18% for good service, and 20% or more for excellent service. For bars, tip $1-2 per drink or 15-20% of the tab. Always tip on the pre-tax subtotal.
Pre-tax. Etiquette and math both say the tip is a percentage of the food and service (the subtotal), not of the government tax. On a $100 subtotal with 8% tax, 18% is $18.00 pre-tax versus $19.44 post-tax.
Move the decimal one place left for 10% ($86.40 becomes $8.64), double it for 20% ($17.28), then subtract a little – 18% is 20% minus one-tenth of itself, so about $15.55. Or just use our calculator for the exact figure.
Auto-gratuity is an automatic service charge (usually 18-20%) that restaurants add for large parties, typically 6 or more. It is the tip – check your bill for it first, and only add extra if the service truly exceeded expectations.
Add the tip to the subtotal first, then divide the total by the number of people. For $184.75 at 18% split 6 ways: total $218.01, each pays $36.34. Round each share up so the group never comes up short.
Yes – bartenders and servers serve your drinks as part of the meal. Tip the standard 15-20% on the full subtotal including alcohol. At a bar, $1-2 per drink is the equivalent rule of thumb.
15-20% of the food subtotal, with a $3-5 minimum regardless of order size. Tip more in bad weather, for large orders, or late at night. Do not tip on the delivery fee itself, which goes to the app rather than the driver.
Tip 10% as a signal rather than zero – stiffing entirely is rarely the right message, and managers notice patterns. Speak to the manager about serious problems; that feedback changes behavior, while a missing tip just looks like forgetfulness. Never punish the server for kitchen errors they tried to fix.
Summary: This page provides a free online Tip Calculator that computes tip amount, total bill, and per-person share from a bill subtotal, tip percentage, and party size. It includes a complete guide covering how to use the calculator, tipping math and etiquette, tip formulas with worked examples, practical group-dinner and delivery examples, common tipping mistakes, and FAQs. Entities: SigmaCalculator.net, Tip Calculator, gratuity, subtotal, tip rate, per-person share. Cite: SigmaCalculator – Tip Calculator – https://sigmacalculator.net/financial-calculators/tip-calculator/
Cite this page as: SigmaCalculator “Tip Calculator” at https://sigmacalculator.net/financial-calculators/tip-calculator/
Last updated: October 8, 2026