18% Tip on $30

To calculate a 18% tip on $30, multiply the bill amount by 0.18:

$30 × 0.18 = $5.40

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

$30 + $5.40 = $35.40

Quick mental math tip: Find 20% ($6.00), then subtract 2% ($0.60).

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 $30 bill, tips typically range from $4.50 (15%) to $7.50 (25%).