How do you calculate a 20% tip?

Multiply the bill amount by 0.20. For example, on a $45 bill: $45 × 0.20 = $9 tip, making the total $54. A quicker mental math trick: move the decimal left one place to get 10% ($4.50), then double it for 20% ($9.00).

What is the standard tip percentage in the US?

For sit-down restaurants, 15% is considered the minimum, 18-20% is standard for good service, and 25%+ is for exceptional service. For takeout, 10-15% is common. Coffee shops and counter service typically have tip prompts starting at 15%, but tipping is optional.

Should you tip on the pre-tax or after-tax amount?

Technically, tipping on the pre-tax subtotal is the correct approach. But in practice, many people tip on the total because it is easier. The difference is small — on a $60 bill with 8.5% tax, tipping 20% pre-tax vs post-tax is about $1.

How do you split a bill with different orders?

The simplest approach for groups with very different orders is for each person to pay their own subtotal plus their share of tax and a tip on their portion. For groups where everyone ordered similarly, splitting the total evenly is usually faster and close enough.

Is it okay to not tip?

In the US, tipping at sit-down restaurants is a strong social expectation because servers are typically paid below minimum wage and depend on tips as income. In other countries (Japan, Australia, most of Europe), tipping is not expected or even considered rude. Always research local customs when traveling.

Tip Calculator — How to Calculate Tip and Split the Bill

Tipping shouldn't be complicated, but somehow it always sparks a moment of mental gymnastics at the end of a meal. You're trying to calculate 18% of a $73.40 bill after splitting an appetizer, factoring in whether to tip on the pre-tax amount, and simultaneously deciding if the service was worth 20% or more. It's a lot for what should be a simple part of a nice evening out.

The Tip Calculator handles all of this instantly — bill amount, tip percentage, number of people, and it gives you everyone's share. But understanding the logic behind it makes you a more confident tipper in any situation, not just when you have your phone handy.

The Math Behind Tipping

Tip calculation is just multiplication, but there's a mental math shortcut worth knowing.

The basic formula: Tip = Bill Amount × (Tip Percentage ÷ 100)

For a $58 bill at 20%: $58 × 0.20 = $11.60 tip. Total = $69.60.

The mental math shortcut for 20%: Move the decimal one place left (that gives you 10%), then double it.

$58 bill → $5.80 is 10% → $11.60 is 20%

For 15%: Calculate 10% and add half of that.

$58 bill → $5.80 is 10% → $2.90 is 5% → $5.80 + $2.90 = $8.70 is 15%

For 18%: Calculate 20% and subtract 10% of the original tip.

20% of $58 = $11.60 → 10% of $11.60 = $1.16 → $11.60 - $1.16 = $10.44 is 18%

Once you have the tip amount, add it to the original bill for the total. Dividing by the number of people gives each person's share.

Pre-tax or post-tax?

Technically, the "proper" approach is to tip on the pre-tax subtotal since you're tipping on the service, not the government's cut. But in practice, most people tip on the total amount shown on the bill because it's easier. The difference is genuinely small. On a $60 meal with 8.5% tax, tipping 20% on the pre-tax amount versus the total is a difference of about $1.02. Not worth the mental overhead unless you're on a tight budget.

US Tipping Guide by Situation

Tipping norms in the US vary a lot by context. Here's what's actually expected, not just what tip-prompt screens try to convince you.

Sit-down restaurants

This is where tipping is most expected and most impactful.

15%: The floor for adequate service. Service had to be clearly bad to justify going lower.
18-20%: The genuine standard for normal, competent service. This is what most servers expect.
22-25%: Excellent service, or when you want to acknowledge that your server went above and beyond.
25%+: Exceptional service, large groups where service was outstanding, or when you're a regular who wants to show appreciation.

Remember that in most US states, servers are paid a "tipped minimum wage" that can be as low as $2.13 per hour federally, with tips expected to make up the difference to at least regular minimum wage. The social contract here is real — not tipping at a sit-down restaurant is effectively docking someone's pay.

Bars and bartenders

For drinks at a bar, $1-2 per drink is the standard for simple orders (beer, wine, basic cocktails). For complex cocktails that require actual craft, $2-3 per drink is appropriate. When you're running a tab, 18-20% of the total is normal.

Takeout and delivery

Takeout (picking up yourself): Tipping is optional but appreciated. 10-15% is kind, especially if the order was complex or you're ordering frequently from the same place.

Food delivery apps: 15-20% is standard, and it matters more than takeout since drivers are covering gas and wear on their vehicle. The app's default suggestions have crept up to 20-25%, which is fine if you want but not obligatory.

Hotels

Bellhop/porter: $1-2 per bag.

Housekeeping: $2-5 per night, left daily (because the person cleaning your room may not be the same person each day). This one gets skipped a lot and shouldn't be.

Room service: Check the bill first. Many hotels add a service charge (15-20%) automatically. If they do, you don't need to add more, though a small cash tip is always appreciated.

Concierge: Not mandatory for general information. For tickets, reservations, or something that took real effort, $5-20 is appropriate depending on the favor.

Taxis and rideshares

Traditional taxis: 15-20% is standard.

Uber/Lyft: These platforms actively prompt for tips and 10-20% is common. It's worth noting that for short rides where the base fare is already low, a flat $1-2 minimum is kind.

Personal services

Haircuts: 15-20% of the service cost.

Spa services (massage, facial, etc.): 15-20%.

Food truck: Not expected but appreciated. Jar is usually present.

Counter service coffee shops: Entirely optional. The 20-25% prompts on Square terminals have created pressure here, but tipping is not the same expectation as sit-down restaurants.

Splitting the Bill with a Group

Group dinners are where tip calculation gets genuinely complicated, especially when people ordered very different things.

The even split (most common)

Everyone pays the same total divided by the number of people, plus an even share of tip. This works well when everyone ordered roughly the same amount, and it's fast.

Using the calculator: Enter the total bill amount, your tip percentage, and the number of people. It does the division instantly.

The math: ($120 bill + $24 tip at 20%) ÷ 4 people = $36 per person.

When orders are wildly different

If someone ordered a $45 steak and wine while someone else had a $12 salad and water, even splitting feels unfair. Options:

Track individual totals: Each person adds up their own items, then everyone tips on their own subtotal. More accurate but requires someone to work out the itemized bill.
Use a bill-splitting app: Splitwise, Venmo, or similar tools let you log who ordered what and auto-calculate shares.
Just round up and move on: Honestly, for most friend groups, someone throwing in an extra $5 to even out a slight imbalance is faster and less awkward than debating for ten minutes.

Tip on the whole bill, not individual shares

When splitting, always calculate the tip on the full bill total and then divide the tip equally, rather than having each person calculate their own tip on their portion. It reduces rounding errors and ensures the server gets a consistent tip.

Tipping Around the World

If you travel internationally, knowing local norms saves you from both undertipping (where it's expected) and overtipping (where it can actually be awkward).

Japan

Do not tip in Japan. It's genuinely considered rude — the idea being that professionals take pride in their work and don't need to be additionally compensated for doing their job well. Leaving money on the table at a restaurant may prompt your server to chase you down to return it.

Most of Europe

Service charges are often included in the bill (look for "service compris" or "service included"). Where it's not included, rounding up or leaving a few coins is common, but 20% tips are not expected and can seem unusual. In Germany, it's common to round up to the nearest euro. In France and Italy, a small amount left in cash is polite.

Australia and New Zealand

No tipping culture. Hospitality workers are paid proper wages (often $20-25/hour), so tipping is neither expected nor common. You won't cause offense by not tipping, but a small tip for exceptional service is accepted graciously.

United Kingdom

For restaurants: 10-12.5% is common, but check if service charge is already included. For pubs, tipping for drinks is unusual, though you can offer "one for yourself" (buy the bartender a drink). For taxis, rounding up is the norm.

Canada

Similar to the US, 15-20% at restaurants is standard. The proximity to American culture means expectations are close to US norms.

Southeast Asia and Latin America

Norms vary widely by country and establishment type. In tourist-oriented restaurants in Bangkok, Mexico City, or Buenos Aires, tips are appreciated and sometimes expected. In local spots, it may not be customary. 10% is generally safe and appreciated.

When to Tip More, Less, or Handle Bad Service

When to tip more

Long, complex meals with attentive service
Large parties where coordinating service is genuinely harder work
Being a regular at a place you want to keep going back to
Holiday periods when service industry workers are working instead of celebrating

When bad service happens

This is worth thinking through rather than just defaulting to "I'll leave 10%."

First, consider what actually went wrong. Was the food slow? That might be a kitchen problem, not your server's fault. Was your server inattentive, rude, or genuinely dropped the ball? That's different.

If the service was bad enough to affect your tip, consider mentioning it to a manager first. Most restaurants would rather fix the problem than have you leave unhappy. You may get a discount or a comp, and the restaurant gets useful feedback.

As a baseline: going below 10% at a sit-down restaurant is a significant statement. If the service was terrible, 10-12% still acknowledges the work while signaling your dissatisfaction. Tipping nothing is a nuclear option and should match the severity.

Making It Simple

The mental math for tipping is a learnable skill, but there's no reason to stress over it when you have a phone in your pocket. The Tip Calculator lets you enter the bill, choose your percentage, split by the number of people, and see everyone's share in seconds.

It handles the rounding, the division, and the decision of whether to tip on the pre-tax amount so you don't have to. What it can't do is tell you exactly how much to tip — that still depends on the service, the context, and your own judgment. But with the right norms in your head and a calculator for the arithmetic, that decision gets a lot simpler.