15% Tip on $100

To calculate a 15% tip on $100, multiply the bill amount by 0.15:

$100 × 0.15 = $15.00

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

$100 + $15.00 = $115.00

Quick mental math tip: Find 10% ($10.00), then add half of that ($5.00).

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 $100 bill, tips typically range from $15.00 (15%) to $25.00 (25%).