Gratuity Calculator Tip/gratuity amount. Bill amount ($) Tip percentage (%) Tip ($) 14.4 Total with tip ($) 94.4 Step-by-step with your numbers: 1. Values used: 2. Bill amount = 80 $ 3. Tip percentage = 18 % 4. Tip = (80 / 100) x 18 = 0.8 x 18 = 14.4$ 5. Total with tip = 94.4$ Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Quick tip calculator. FAQ Pre-tax? Customarily tip on the pre-tax amount. Related calculators Tip Calculator Calculate a tip and split the bill between people. Commission Calculator Calculate sales commission. Percentage Calculator Find what a percentage of a number is (X% of Y).