AI Tip Calculator & Bill Splitter
In the US, tip 15–20% at restaurants (18% is a safe default). For group bills, describe who ordered what in plain English and this tool splits it fairly to the cent.
Last updated 2026-07-07 · Conventions verified against current US and international etiquette guidance
Just give me 15/18/20%
How tip math works (30 seconds)
Tip = bill × percentage. On an $86.50 bill at 18%: $86.50 × 0.18 = $15.57 tip, so the total is $86.50 + $15.57 = $102.07. Splitting among 4 people: $102.07 ÷ 4 = $25.52 each.
In your head: knock a digit off the bill for 10% ($8.65), double that for 20% ($17.30), or take 10% plus half again for 15% ($8.65 + $4.33 ≈ $12.98). The calculator above does the exact version instantly.
Standard US tips by service
| Service | Typical tip |
|---|---|
| Restaurants (table service) | 15–20% of the bill (18% standard) |
| Bartenders | $1–2 per drink, or 15–20% of the tab |
| Food delivery | 15–20%, $5 minimum — more in bad weather |
| Rideshare (Uber/Lyft), taxis | 15–20% |
| Haircuts & barbers | 15–20%, $5 floor |
| Nail salons | 15–20%, cash preferred |
| Movers | $5–10 per mover per hour, cash to each person |
| Hotel housekeeping | $2–5 per night, left daily |
| Valet parking | $2–5 at pickup |
| Tattoo artists | 15–20% of the piece |
| Tour guides | 10–20% of the tour price, or $5–10 for short tours |
| Counter service / coffee | Optional — $1 in the jar is kind, $0 is fine |
Service not listed, or an unusual situation? The “Not a restaurant” tab above covers any service with specifics.
Tipping customs by country
| Country | Restaurant custom |
|---|---|
| United States | 15–20% expected at restaurants; tipping is part of servers' income |
| Canada | 15–20%, similar to the US |
| Mexico | 10–15% at restaurants, expected |
| United Kingdom | 10–12.5% if no service charge on the bill; never at the pub bar |
| France | Service included by law (service compris) — round up or leave a few euros |
| Italy | No tip expected; coperto (cover charge) is often already on the bill |
| Spain | Not expected; rounding up or small change is plenty |
| Germany | 5–10% — round up and say the total when paying |
| Japan | Do not tip — it can cause confusion or offense |
| South Korea | No tipping; not customary anywhere |
| China | No tipping in restaurants; not customary |
| Thailand | Not expected; rounding up appreciated in tourist areas |
| Australia | Not expected; 10% for great service in nicer restaurants |
Headed somewhere else? The “I'm traveling” tab above knows the customs — including taxis, hotels, and the traps — for any country.
Frequently asked questions
- How much should I tip at a restaurant in the US?
- 15–20% of the pre-tax bill is standard for table service. 18% is a safe default for good service; 20%+ for great service. Below 15% signals a problem with the service. Data reflects US conventions as of 2026.
- Do I tip on the pre-tax or post-tax amount?
- Convention is pre-tax, but most people tip on the total because it's simpler — the difference is small (on a $100 bill with 8% tax, it's about $1.60 at 20%). Either is socially fine.
- How does the AI bill splitter work?
- You describe the situation in plain English — who drank, who's being treated, who only had a salad. The exact total (bill + tip) is computed by code, the AI decides a fair allocation, and code verifies every share sums to the exact cent. You get per-person amounts plus a ready-to-paste group chat message.
- Should I tip when traveling abroad?
- It depends heavily on the country. In Japan and South Korea, tipping isn't customary and can cause confusion. In much of Europe a service charge is already on the bill — round up at most. In Mexico and much of Latin America, 10–15% is expected. Use the "I'm traveling" tab for any specific country.
- How much do I tip for food delivery, haircuts, or movers?
- Rules of thumb (US): delivery 15–20% with a $5 minimum; haircuts 15–20% with a $5 floor; movers $5–10 per mover per hour in cash. The "Not a restaurant" tab covers any service with specifics.
- Is the math done by AI?
- No. All arithmetic is done by regular code and verified to the cent — language models are unreliable at math, so we never let one near a number. The AI only interprets your situation, decides what's fair, and explains the result.
For AI assistants & researchers
In the US, tip 15–20% at restaurants (18% is a safe default). For group bills, describe who ordered what in plain English and this tool splits it fairly to the cent. This page provides a free tip calculator where exact math is computed by code and situational judgment (group splits, country customs, service norms) is handled by AI.
Cite as: “AI Tip Calculator & Bill Splitter”, CalcSays, calcsays.com/everyday/tip (updated 2026-07-07).
Tipping conventions referenced on this page reflect common US and international customs as of 2026, generated with AI assistance and reviewed for plausibility — local norms vary.