# Tip & Bill Split Calculator > Tip calculator and bill split calculator: add a restaurant tip and divide the total evenly or unevenly across any group. Free, private, runs in your browser. - **Canonical URL:** https://boringtoolskit.com/tip-bill-split-calculator/ - **Category:** Everyday Calculators - **Evidence level:** authored-methodology - **Reviewed:** August 2026 - **Last verified:** 2026-09-20 - **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request. ## How it works Tip base = subtotal, or subtotal + tax when that option is selected. Tip = tip base × tip rate ÷ 100. Unrounded total = subtotal + tax + tip. Equal share = total ÷ people. Optional rounding raises each share to the selected increment and reports the extra collected. ## Worked example For a $100 subtotal, $8 tax, 20% tip on the subtotal, and four people, the tip is $20, the bill total is $128, and each person pays $32. ## Assumptions - Every person receives an equal share. - Tax is entered as an amount and is not estimated from location. - Optional per-person rounding can make the collected total higher than the exact bill total. ## Common questions ### Should I tip on tax? Practices differ. The calculator exposes both subtotal-only and subtotal-plus-tax methods rather than prescribing one. ### Why do stacked rounded shares exceed the bill? Rounding each person’s share upward creates a visible rounding adjustment, so the collected total can exceed the exact total. ### Does the calculator send my bill anywhere? No. It performs deterministic arithmetic in your browser and does not contact a restaurant or payment service. ### How much should I tip at a restaurant? In the U.S., 15–20% of the pre-tax bill is the standard range, with 20% a common default for good service. For large groups, some restaurants add an automatic gratuity (often 18%) — check the receipt, since you generally shouldn't tip on top of an added service charge. ### Should I tip before or after tax? Convention says tip on the pre-tax subtotal, not the tax. This calculator lets you choose: by default it tips on the subtotal only; tick 'Calculate tip on subtotal plus tax' to include tax in the base, which raises the tip slightly. Both are reasonable — the difference is usually a few cents to a dollar. ### How do I calculate a 15%, 20%, or 25% tip? Move the decimal one place left to get 10%, then adjust: 15% = 10% + half of 10%; 20% = double 10%; 25% = 10% × 2.5. On a $50 bill, 10% is $5, so 15% is $7.50, 20% is $10, and 25% is $12.50. Use the preset buttons to apply these instantly. ### How much should I tip for delivery or other services? Food delivery commonly gets 15–20% (or a flat $3–5 for small orders), ride-share 15–20%, a hair stylist or barber 15–20%, a massage therapist 15–20%, and movers 10–15% or a flat amount. For services where a service charge is already added, you don't need to tip on top. ### How do I split the bill and tip evenly? Add the tip to the bill, then divide the total by the number of people. For example, a $100 bill with 20% tip is $120; split 4 ways is $30 each. This calculator shows the exact per-person share and can round each share up to the next dollar or $5 to simplify payment. ## Related tools - /percentage-calc/ - /sales-tax-vat-calculator/ - /payment-fee-calculator/ ## Sources - [Calculator methodology and reference cases](https://boringtoolskit.com/methodology/) --- *Local planning estimate. Verify current terms, rates, and policies before acting.*