Tips: how much to leave and how to split the bill
Tips work differently in each country. Enter the bill and a percentage and you see the tip, the total, and the share per person. It also shows what 15, 18 or 20 percent means in money.
TL;DR
- The tip is simply the bill amount multiplied by the tip percentage divided by 100
- Formula: Tip = Bill × Rate | Total = Bill + Tip | Per Person = Total ÷ People
- Example 1: A $48.50 dinner at 18%
How it works
The tip is simply the bill amount multiplied by the tip percentage divided by 100. The total is the bill plus the tip, and when a group splits the bill, the total is divided by the number of people. The calculator applies these steps instantly, and can also round the result to the nearest dollar or cent for simpler cash payments.
The math
To calculate the tip, multiply the bill amount by the tip rate (e.g., 0.18 for 18%). The total is obtained by adding the tip to the original bill. The per-person share is the total divided by the number of people splitting the payment, optionally rounded up to a convenient figure.
The mental-math trick used by many waiters is the 10% shortcut: move the decimal point one place left, then double it for 20% or multiply by 1.5 for 15%.
Examples
Example 1: A $48.50 dinner at 18%
- 10% of $48.50 = $4.85
- 18% = 10% + 5% + 3% → $4.85 + $2.43 + $1.46 ≈ $8.74
- Total: $48.50 + $8.74 = $57.24
- Rounded to a $57 bill, the tip becomes $8.50
Example 2: Splitting a $120 bill among 4 people at 20%
- Tip: 20% of $120 = $24
- Total: $120 + $24 = $144
- Per person: $144 ÷ 4 = $36
- Each person owes exactly $36
When to use it
✦ Restaurants and Bars
Diners quickly compute the correct tip for dinner, drinks, and group meals without awkward mental arithmetic at the table.
✦ Services and Deliveries
Customers tip for haircuts, taxis, hotel staff, and food delivery; the calculator adapts the same math to any percentage or bill.
⚠ Common mistakes
- Tipping on the Taxed Total: Some regions calculate tips on the pre-tax subtotal; check the bill to see what is expected.
- Forgetting Service Charges: Many restaurants add a service charge automatically; tipping on top can double the gratuity.
- Miscalculating Split Bills: Splitting the tip before the total can leave the last person paying more than their share.
FAQ (6)
How much should I tip?
In the US, 15-20% is standard for good service; in many European and Asian countries, 5-10% or a simple rounding up is customary.
Should I tip on the pre-tax amount?
Tipping on the pre-tax amount is slightly more generous to the customer but most calculators default to the full bill for simplicity.
If I type my salary or prices here, do you store them?
No — and that's deliberate. Everything runs locally in your browser, nothing leaves your device. We don't see your net salary, your margins, or the VAT numbers you test. For a finance tool that matters: you can run a quick check on a payslip or an invoice while on public Wi-Fi and close the tab knowing no trace is kept server-side.
Can I use it on the train without signal to check an invoice?
Yes. Load the page once, then it works offline. VAT, discount and mortgage math are all pure JavaScript — no API call. I often test it in airplane mode: open the mortgage page, type 250,000 at 4.5% for 25 years, you get the schedule instantly, even in a tunnel.
Can I file taxes with these results?
Use it as a fast sanity check, not as the final filing. Formulas are standard (e.g. Net = Gross / 1+VAT) and verified against official sources listed at the bottom, but rates and thresholds change — Italy's 22% vs Germany's 19%, or IRPEF brackets. For the actual declaration, double-check with your accountant or Agenzia delle Entrate / HMRC / IRS.
How do I send a calculation to my accountant?
Hit 'Share Link' under the results. It encodes the inputs in the URL — e.g. ?price=1200&vat=22 — so your accountant opens the exact same view, no screenshot needed. You can also copy the result with one tap and paste it into an email.