Finance Formula • Published on July 30, 2026 • Last updated August 09, 2026
Tap a star to rate us instantly.
Total pre-tax or subtotal cost of meal/service
Gratuity rate percentage (e.g. 15%, 18%, 20%)
Calculated gratuity payout value
The tip calculation formula computes the gratuity amount by taking a chosen percentage of the subtotal or final check. It allows diners and customers to reward good service accurately.
Gratuity is traditionally calculated on the pre-tax subtotal to avoid tipping on sales tax. However, calculating tip on the total bill is widely practiced for convenience.
Plain-language explainers that sit next to this tool.
Picking the wrong domain name can quietly hurt your traffic and branding for years. Follow these seven rules before you register anything.
Calculating working days between two dates means excluding weekends and public holidays from the total. Learn the formula, a worked example, and when this matters most.
Love calculators turn names or birthdates into a compatibility percentage using simple algorithms, not psychology or science. Here is what actually drives the number, and what real compatibility research says instead.
Should you keep renting or buy a home? Compare the true long-term cost of renting versus buying with a worked example, opportunity cost, and the break-even math that actually matters.
Search 190+ free tools by name, or pick a category below. Every one runs instantly in your browser — no signup, nothing to install.
