Tip Calculator: How to Calculate a Tip and Split a Bill

How to Calculate a Tip

The formula is simple: multiply the bill total by the tip percentage divided by 100.

• Tip amount = Bill × (Tip% ÷ 100)
• Total bill = Bill + Tip amount
• Per-person share = Total ÷ Number of people

For example, a $68 dinner bill with a 20% tip: 68 × 0.20 = $13.60 tip, making the total $81.60. Split between 4 people: $20.40 each.

How to Use the Tip Calculator

1. Open the Tip Calculator.
2. Enter the bill amount — include tax if it is already on the bill, or use the pre-tax subtotal if you prefer to tip on food and service only.
3. Select a tip percentage using the quick buttons (10%, 15%, 18%, 20%, 25%) or type a custom rate.
4. Set the number of people splitting the bill using the + and − buttons.
5. Read the tip amount, total, and per-person share instantly — no button to press.

How Much Should You Tip? A Guide by Situation

Should You Tip Before or After Tax?

Tipping conventions vary. In the United States, most diners tip on the pre-tax subtotal, since tax is a government charge unrelated to the quality of service. However, tipping on the post-tax total is also common and widely accepted. The difference on a typical bill is small — on a $50 pre-tax meal with 8% tax, 20% of $50 is $10.00 vs 20% of $54 is $10.80. Enter whichever figure feels right to you into the bill field.

How to Split a Bill Fairly

Equal split

The simplest approach: divide the total (including tip) equally by the number of diners. Use the tip calculator — set people to the group size and read the per-person share. Have everyone round up to the nearest dollar so cash covers any rounding gap.

Split by what each person ordered

When meal costs vary significantly — one person ordered a steak, another a salad — equal splitting can feel unfair. Set people to 1 in the calculator and enter each person's individual subtotal to find their tip separately, then add it to their food cost.

Large party gratuity

Most restaurants automatically add an 18–20% gratuity for groups of 6 or more. Check your bill for a line labelled “gratuity” or “service charge” before adding another tip on top. If the auto-gratuity is already there, the calculator is useful for verifying the charge is correct.

Tipping Norms Outside the US

Tipping culture differs significantly by country. In Japan, tipping is considered rude — exceptional service is simply part of professional pride. In Australia and New Zealand, tipping is appreciated but not expected; 5–10% is sufficient at sit-down restaurants. In the UK, 10–12.5% is common at restaurants, but check whether a service charge is already included. In France, rounding up or leaving a few euros is customary. In Canada, norms closely mirror the US — 15–20% is standard. Always check local custom when travelling rather than applying US tipping rates abroad.

Common Mistakes When Splitting a Bill

Forgetting to check for included gratuity

A gratuity line buried at the bottom of a restaurant bill is easy to miss. Always scan for “service charge,” “gratuity,” or “auto-grat” before calculating an additional tip.

Double-tipping on delivery apps

Food delivery apps pre-select a default tip at checkout. If you adjusted the tip during ordering, there is no additional tip to leave at the door. Check the order summary before paying a second time.

Using the wrong base for the tip

A common error is calculating a tip on the post-discount total when you intended to tip on the full menu price. If you used a coupon or deal, decide whether the tip should reflect the original price or the discounted amount — servers typically expect the tip to reflect the service delivered, not the promotional saving.

Uneven rounding that leaves the table short

When everyone rounds down to the nearest dollar, the group often comes up short on the total. One person rounding up is usually enough to cover the gap — or use the calculator's exact per-person figure and let one person collect and reconcile.