A tip calculator takes the mental math out of dining, delivery, and services: enter the bill, pick a tip percentage, and instantly see the tip amount, the grand total, and how much each person owes when splitting. It works for restaurants, bars, salons, taxis, and anywhere else a gratuity is expected.
In the United States, tipping is not just a bonus — servers often earn a sub-minimum base wage and rely on tips for most of their income. That is why 15%–20% is considered the standard at sit-down restaurants, with higher amounts for excellent service. Use the quick-pick percentages or type any custom rate you like.
How the Tip Is Calculated
The math is simple percentage arithmetic:
Tip = Bill × (Tip % ÷ 100) Total = Bill + Tip Per Person = Total ÷ Number of People
For example, an 18% tip on a $68.50 bill is $68.50 × 0.18 = $12.33, for a total of $80.83. A quick mental shortcut: move the decimal one place left to get 10% ($6.85), then adjust — double it for 20%, or add half again for 15%. Whether to tip on the pre-tax or post-tax amount is a matter of preference; tipping on the post-tax total is slightly more generous and is what most people do without thinking about it.
US Tipping Norms by Service
Standard tipping expectations in the United States:
- Sit-down restaurant: 15%–20% of the bill (20%+ for excellent service)
- Food delivery: 10%–15%, with a $3–$5 minimum for small orders
- Bartender: $1–$2 per drink, or 15%–20% of the tab
- Hair stylist or barber: 15%–20%
- Taxi or rideshare: 10%–15%
- Hotel housekeeping: $2–$5 per night
- Coffee shop counter service: optional, $1 or spare change is appreciated
Counter-service tipping (the tablet flip) is genuinely optional — no one should feel obligated to tip 20% for a handed-over muffin. Full-service situations where someone waits on you are where the norms above apply.
Example: Splitting an $80 Dinner Four Ways
Suppose four friends share a dinner with an $80.00 bill and the service was good, so they tip 20%.
Tip = $80.00 × 0.20 = $16.00 Total = $80.00 + $16.00 = $96.00 Each person pays = $96.00 ÷ 4 = $24.00 Tip per person = $16.00 ÷ 4 = $4.00
If the group had chosen 15% instead, the tip would be $12.00, the total $92.00, and each share $23.00 — only a dollar less per person. When splitting between many people, rounding each share up to the nearest dollar is a painless way to bump a good tip to a great one.
Frequently Asked Questions
How much should I tip at a restaurant?
Tip 15%–20% of the bill at a sit-down restaurant in the US. Use 15% for adequate service, 18% for good service, and 20% or more for excellent service. For large parties, check the bill first — many restaurants automatically add an 18%–20% gratuity for groups of six or more.
Should I tip on the pre-tax or post-tax amount?
Either is acceptable. Etiquette experts say the pre-tax subtotal is the technically correct base, but most people tip on the post-tax total for simplicity. The difference is small — on a $100 bill with 8% tax, tipping 20% post-tax adds just $1.60 more.
How much do I tip for food delivery?
Tip 10%–15% of the order total for food delivery, with a minimum of $3–$5 even on small orders. Consider tipping more for bad weather, long distances, large orders, or stairs. For app-based delivery, remember that service fees usually do not go to the driver.
Is it rude not to tip in the United States?
At full-service restaurants, yes — skipping the tip is considered a serious breach of etiquette because servers are often paid a tipped minimum wage as low as $2.13 per hour federally. If service was truly poor, leaving 10% and speaking to a manager is the accepted response rather than leaving nothing.
How do I quickly calculate a tip in my head?
Move the decimal point one place to the left to find 10% — on a $54.00 bill, that is $5.40. Double it for 20% ($10.80), or add half of the 10% figure for 15% ($5.40 + $2.70 = $8.10). Rounding the bill to the nearest dollar first makes it even faster.