Tip Calculator

How the Tip Calculator Works — and How Much You Should Actually Leave

Tipping is one of those customs that feels simple until you actually have to do the math in your head at the end of a meal. What's 18% of $67.40? Should the tip be on the pre-tax or post-tax amount? Does a large party change the expectation? And when splitting the bill, who owes what? This calculator answers all of those questions in one place — and the answer might surprise you if you've been tipping on the wrong base. Understanding the norms and the math behind them makes the whole thing less awkward for everyone.

The formula behind it

A tip is just a percentage of the bill. The formula is tip = bill × (percentage ÷ 100), and the total you leave is bill + tip. If your bill is $67.40 and you want to leave 20%, that's 67.40 × 0.20 = $13.48, for a total of $80.88. Splitting among several people is just division: split the total by the number of diners. The one subtlety is what “the bill” means — is it the pre-tax subtotal or the post-tax total? Most etiquette guides say to tip on the pre-tax subtotal, because the tax is a pass-through to the government, not revenue for the restaurant or server. In practice, the difference is small — about $1 on a $50 bill in a typical city — so either method produces a reasonable tip. Our calculator lets you choose, so you can match whatever convention you prefer.

How much should you tip?

In the United States, restaurant tipping norms have crept upward over the past two decades. The traditional range was 15–20%: 15% for adequate service, 18% for good service, 20% or more for excellent service. Today, many servers and etiquette experts consider 18–20% the standard, and some suggest 20% as the baseline in major cities with high living costs. Tipping below 15% is generally reserved for genuinely poor service — and even then, it's worth considering whether the server or the kitchen was responsible. At high-end restaurants, cocktail bars, and coffee shops, the norms differ: cocktails often warrant $1–2 per drink, coffee shop tips are usually 10–15%, and counter service with a tip jar is entirely optional. For food delivery, 15–20% (with a $2–3 minimum) is standard, plus a higher tip for large or difficult orders.

Splitting the bill fairly

When a group shares a meal, the fairest approach depends on what was ordered. If everyone ordered similar items, an even split of the total (including tip and tax) is simple and usually fine. If one person ordered steak and lobster while others had salad, splitting evenly can feel unfair to the lighter eaters — but itemizing every dish can feel petty and slow down the table. A common middle ground is to split the tax, tip, and shared appetizers evenly, while each person pays for their own entrée. Our calculator helps with the even-split case, which is what most groups actually use in practice. Keep in mind that some restaurants automatically add an 18–20% gratuity for parties of 6 or more — check your receipt before adding more, since double-tipping is a common mistake.

Limitations to keep in mind

This calculator computes the tip based on the numbers you enter — it doesn't judge whether the tip is appropriate, and it can't account for special situations. Tipping norms vary by country: in most of Europe, Asia, and Australia, restaurant staff are paid a living wage and tips are smaller (5–10%) or simply not expected. In some countries, tipping is considered rude. In the U.S., the customary percentages have been influenced by the fact that many servers rely on tips as their primary income — federal minimum wage for tipped workers is just $2.13 per hour, with the expectation that tips make up the difference. If you're traveling internationally, it's worth checking local customs before you assume your home-country norms apply. And if you're on a tight budget, remember that tipping is a custom, not a law — but the people serving you are counting on it.