How to use this calculator
Tip calculations multiply the bill by the selected percentage, then add the tip to the bill.
The method
Enter your values in the labeled fields and choose Calculate. The result panel shows the answer and supporting values when useful.
Bill amount: 85, Tip (%): 18
Select Calculate to evaluate these example values.
Scope and limitations
Local customs and whether tax should be included in the tipping base are choices for the user.
Common questions
Can I use different units?
Use consistent units unless this page is a unit converter. The result follows the units implied by the inputs.
Are results exact?
Displayed values may be rounded. Keep extra precision for important follow-up calculations.
Methods & verification
Formulas use standard mathematical definitions and fixed unit factors where applicable. See our methodology for numerical conventions, rounding, privacy, and limitations.