Splitting a bill fairly
Tip math
Tip = bill × tipPercent/100. Total = bill + tip. Per person = total / people when splitting evenly. Uneven splits need itemized apps; this tool assumes equal shares.
Etiquette note
Customary tip rates vary by country and service type. Some regions include service charge already—read the receipt.
Worked example
Bill 80, tip 15%, people 4 → tip 12, total 92, each 23.
Limits
Tax-inclusive menus, coupon order, and shared appetizers can change fairness. Educational only.
FAQ
Q: Tip before or after tax? A: Local custom differs; many US diners tip on pre-tax food, others on the total shown.
Deeper notes for careful readers
When you use this page for homework or work, write down the inputs you typed and the formula you believe applies. Then recompute once by hand or with a second method. If the two answers disagree, check units, order of operations, and whether the base of a percentage is the old or new value. Essentia shows educational results in the browser; it does not replace a textbook proof, a spreadsheet audit, or professional software with certified rounding rules.
Practice checklist
1) State the question in one sentence. 2) Name the formula. 3) Plug in numbers with units. 4) Sanity-check magnitude (too big or too small?). 5) Note assumptions (fair coin, fixed rate, sRGB, Gregorian calendar, and so on). Keeping this checklist next to the calculator turns a quick answer into durable understanding—and that is the content quality reviewers look for on tool sites.
Fairness beyond equal shares
Equal splits assume everyone ordered similarly. Shared appetizers, separate checks, and coupon codes change fairness. Service charges already on the bill should not be tipped twice unless you intend a gift. Travelers should look up local norms: what is generous in one city can be unusual in another. Use Essentia for the arithmetic of an equal split, then adjust socially.