How to Calculate Tip
Learn how to calculate a tip at a restaurant without a calculator. Simple methods for 15%, 18%, 20%, and 25% tips, plus how to split the bill in a group.
Figuring out the tip should not be the hardest part of dinner. But it trips people up more than you would think, especially when the bill has tax, discounts, or a party of eight staring at you while you do math in your head.
A 2023 Pew Research survey found that 72% of Americans feel tipping is expected in more places than it was five years ago. And yet only about a quarter of people consistently tip 20% or more at restaurants. Part of the problem is that nobody taught us the math.
This guide fixes that. We will show you a few dead-simple methods for calculating any tip percentage in your head, no phone required. Once you learn the 10% trick, the rest is just addition.
Find the subtotal on your bill
Look for the line labeled "subtotal" on your receipt. This is the cost of your food and drinks before tax. You want to tip on this number, not the grand total at the bottom. The tax is a charge from the government and has nothing to do with your server. That said, tipping on the post-tax total is common and perfectly fine. The difference is small. On a $50 meal with 8% tax, tipping 20% pre-tax is $10.00. Tipping 20% post-tax is $10.80.
Calculate 10 percent by moving the decimal
This is the foundation for every tip calculation. Take your subtotal and move the decimal point one place to the left. That gives you 10 percent. $56.00 becomes $5.60 $82.50 becomes $8.25 $124.00 becomes $12.40 You do not need a calculator for this step. It works on any number, every time.
Good to know: If you want to make the math even easier, round your subtotal to the nearest $10 before calculating. A $47.83 bill becomes $50, and 10% of $50 is $5. You will overpay by a few cents, but the math is instant.
Build your tip from the 10 percent base
Once you know 10 percent, you can reach any common tip percentage with simple addition or doubling. 15% tip: Take your 10% number and add half of it. If 10% is $5.60, half of that is $2.80. Your 15% tip is $8.40. 18% tip: Double your 10% to get 20% ($11.20), then subtract 2% ($1.12). Your 18% tip is $10.08. Or just round to $10. 20% tip: Double your 10% number. If 10% is $5.60, your 20% tip is $11.20. 25% tip: Take your 20% number and add a quarter of the original 10%. If 20% is $11.20 and 10% is $5.60, a quarter of that is $1.40. Your 25% tip is $12.60.
Try the double-the-tax shortcut
If your receipt shows the sales tax, you can skip the math entirely and just double the tax line. This works best in areas where the combined sales tax is between 8% and 10%, because doubling it lands you right in the 16% to 20% range. Cities where this works well include New York City (8.875% tax, doubled is about 18%), Los Angeles (9.5%, doubled is 19%), Chicago (10.25%, doubled is roughly 20%), and Nashville (9.75%, doubled is about 19.5%). This shortcut falls apart in low-tax states. In Wisconsin (5% tax), doubling only gets you to 10%, which is below standard. And in Oregon, Montana, Delaware, New Hampshire, and most of Alaska, there is no sales tax at all.
Round up to a clean number
Once you have your tip amount, round the total (bill plus tip) to a clean number. If your meal is $47.83 and a 20% tip comes to $9.57, that puts your total at $57.40. Round up to $58 or $60. Nobody will judge you for making the math simple, and your server will appreciate the extra dollar or two. This also makes splitting the check easier, because clean totals divide evenly.
Split the tip when dining in a group
Calculate the tip on the full bill first, then divide. Say four people share a $120 dinner and agree on 20%. The tip on $120 is $24, making the total $144. Divide by four and each person pays $36. A faster approach: each person can calculate the tip on their own share. Your share of the bill is $30. Twenty percent of $30 is $6. You pay $36. Same result, no group math needed. If one person orders significantly more than the others, it is fair to split based on what each person ordered rather than dividing evenly.
Check for auto-gratuity before adding your own
Many restaurants automatically add an 18% to 20% gratuity for parties of six or more. This will appear as a separate line on your bill, usually labeled "gratuity" or "service charge." If you see it, you do not need to tip again on top of it. You can add a small amount extra if the service was exceptional, but the standard tip is already covered. Auto-gratuity is also common on cruise ships, at resort restaurants, and for room service at hotels. Always read the bill before signing.
Heads up: Digital payment screens at counter-service spots often show suggested tips of 20%, 25%, or even 30%. These are calculated on the post-tax total and can be much higher than they appear. Do the math yourself before tapping a preset button.
The 10% trick is really all you need. Move the decimal, double it for 20%, add half for 15%. That covers every restaurant visit, coffee run, haircut, and cab ride you will ever take. If you remember one number, make it 20%. It is easy to calculate, it is the current standard at sit-down restaurants, and it saves you from overthinking. Round up to a clean total and move on with your night.
Questions we get asked about this
Answers from experience, not a textbook.
The standard tip at a sit-down restaurant in the United States is 18% to 20% of the pre-tax bill. For exceptional service, 25% is generous. For below-average service, 15% signals that something was off without leaving nothing. According to Pew Research, 92% of Americans always or often tip at sit-down restaurants.
Etiquette experts recommend tipping on the pre-tax subtotal, since sales tax has nothing to do with the service. But most people tip on the post-tax total, partly because that is the number right in front of them and partly because card machines calculate suggestions on the full amount. Either way is acceptable. On a typical meal the difference is only a dollar or two.
Tipping on takeout is not required but appreciated. A tip of 10% to 15% is a kind gesture, especially for large or complex orders. For a simple pickup where you walk in and grab a bag, no tip is expected. For delivery, 15% to 20% or a $5 minimum is standard.
Yes. If you used a coupon, gift card, or received a free item, calculate your tip based on the original price before the discount. The server did the same amount of work regardless of what you paid.
In the United States, leaving zero at a full-service restaurant is considered very poor etiquette. Servers earn a base wage as low as $2.13 per hour in many states and rely on tips to make a living. If the service was genuinely bad, a 10% tip signals your dissatisfaction. Leaving nothing also affects bussers, food runners, and bartenders who share in the tip pool. If you had a serious problem, speak to a manager instead.
For a simple drink like a draft beer or glass of wine, $1 to $2 per drink is standard. For craft cocktails that take more time, $2 to $3 per drink. If you are running a tab, tip 18% to 20% on the total at the end of the night.
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