18% Tip on $20

To calculate a 18% tip on $20, multiply the bill amount by 0.18:

$20 × 0.18 = $3.60

Add the tip to the original bill to get the total:

$20 + $3.60 = $23.60

Quick mental math tip: Find 20% ($4.00), then subtract 2% ($0.40).

Standard tipping in the United States ranges from 15% to 25% at restaurants. Here is a general guide:

• 15% — Acceptable for adequate service
• 18% — Standard for good service
• 20% — Most common tip; standard for great service
• 25%+ — Exceptional service or fine dining

For a $20 bill, tips typically range from $3.00 (15%) to $5.00 (25%).