What about delivery and takeout?

Delivery: 15-20% to the driver. Takeout: 0-10%; many people skip it entirely since there's no table service.

Should I tip when service was poor?

In the US, where servers are paid sub-minimum because tips are expected, 10-15% even for poor service is the floor. Speak to the manager separately if there's a real issue.

Tip Calculator

Tip amount and per-person split for any bill.

Result

Total per person

$23.60

Tip amount$14.40
Total bill (with tip)$94.40
Tip per person$3.60
Bill per person (no tip)$20.00
Quick reference15% = $12.00 | 18% = $14.40 | 20% = $16.00

How to use this calculator

Enter the pre-tip bill amount (typically subtotal, not total with tax — though tipping on tax is more generous).
Pick a tip %.
Set the number of people splitting.

About this tool

A simple bill-splitting calculator. Enter the bill amount, tip percentage, and how many people are splitting; see the per-person total. Includes a quick-reference line showing the tip in dollars at 15% / 18% / 20% so you can pick the right round-number tip on the fly. Tip etiquette (US): 15% for adequate service, 18% standard, 20% for excellent. Many places now suggest 25-30% on the receipt — that's above customary, not required.

Frequently asked

Pre-tax is technically correct — tax isn't the server's service. Post-tax is more generous and easier (just multiply the total). Most people don't bother distinguishing.