Tip Calculator Calculator
Enter the bill, pick a tip percentage, say how many people are splitting, and get the tip, the total, and each person's share to the cent. A second mode turns the same tool into a percent-off calculator for sale prices — because a tip and a discount are the same percentage math pointed in opposite directions.
Educational estimate only — not financial advice. Results depend entirely on the numbers and assumptions you enter; real-world returns, rates, taxes, and fees will differ.
What is tips and discounts?
Tipping is customary across US service industries — restaurants above all, where servers' wages are structured around tips — and the arithmetic is always the same: a percentage of the bill, added on top, optionally split among the party. The calculator's job is to make that arithmetic instant and exact at the moment it matters (bill in hand, server waiting), including the per-person split that group dinners chronically fumble, rounding awkwardness and all.
Standard US tipping guidance for sit-down restaurants runs 15–20% of the pre-tax bill for good service, 20%+ for excellent service, with higher norms in major cities; counter service, delivery, rideshares, and personal services each carry their own conventions, described in the variants. The percentage is conventionally calculated on the pre-tax amount — a small refinement this calculator supports by letting you enter the pre-tax subtotal from the receipt rather than the tax-inflated total.
Behind the custom sits a wage structure worth knowing: in most US states, employers of tipped workers may pay a lower direct cash wage — the federal floor for the employer's portion is $2.13 an hour — provided tips bring the worker to at least the full minimum wage; if they do not, the employer must make up the difference. A few states require the full state minimum wage before tips. Either way, in a US restaurant the tip is not a bonus layered on a normal salary in the way it might be elsewhere; for many servers it is the majority of the wage itself, which is the practical reason the 15–20% convention carries real weight.
The discount mode exists because the same skill prices every sale: a percent off is a percentage subtracted instead of added, and the final price is what the percentage leaves behind, not the percentage itself — the most common sale-shopping error ('40% off $85 is $51, not $34'). One tool, both directions, because the underlying operation — percent of an amount, then add or subtract — never changes.
How tips and discounts is calculated
Tip mode multiplies the bill by the tip percentage for the tip amount, adds it for the total, and divides the total by the number of people for the per-person share (splitting the tip separately as well, for parties that divide unevenly). Discount mode subtracts instead: the discount amount comes off the price, and the remainder — also splittable, for shared purchases — is what you pay.
On splitting precisely: real bills rarely divide to the exact cent among a group, and payment apps resolve the odd cent by rounding someone up a penny. The calculator shows exact shares to two decimals; if your party rounds each share up to a whole dollar instead, the server gains a small bonus and the math at the table gets much easier — a socially standard solution this tool happily endorses.
Mental shortcut for the table: 10% is a decimal shift, 20% is double that, 15% is 10% plus half of 10%. On an $85 bill: 10% is $8.50, so 15% is $12.75 and 20% is $17 — enough to sanity-check any calculator or any suggested-tip screen, some of which quietly compute percentages on the post-tax total or default to the highest option.
For uneven splits — one person had the lobster, another had a salad — the fair method is to itemize: each person pays for what they ordered, plus their share of the tax, plus a tip calculated on their own subtotal. This calculator handles each diner's line separately: run it once per person with their subtotal as the bill. That beats both the awkward equal-split-with-resentment and the error-prone mental arithmetic of a crowded table. Groups that dine together regularly often adopt the equal split as a deliberate social choice; when they do, ordering without regard to price is part of the deal, and the calculator's even-split figure is the whole story.
Suggested-tip screens deserve one caution: percentages offered on payment terminals are computed by the merchant's system, sometimes on the post-tax amount and sometimes including fees. Knowing your intended dollar tip from the pre-tax subtotal — this calculator's figure — lets you choose 'custom amount' with confidence when the screen's options run high.
Worked example
An $85 dinner bill, an 18% tip, split between two people. The calculator is pre-loaded in tip mode with these numbers; below, the discount mode runs its own example.
| Bill | $85.00 |
| Tip (18%) | $15.30 |
| Total | $100.30 |
| Per person | $50.15 |
| Tip per person | $7.65 |
An 18% tip on $85 is $15.30, bringing the total to $100.30 — $50.15 each for two diners. The numbers are clean here by design; real splits often produce repeating cents, resolved by the round-up convention described above. In discount mode, the same inputs read differently: 18% off an $85 price is a $15.30 discount and a $69.70 final price — the mirror image of the tip, with the identical $15.30 at its center.
Percent off: using discount mode well
Worked discount example: a $120 jacket at 25% off. Enter 120, 25%, discount mode: the discount is $30 and you pay $90. Stacked promotions chain multiplicatively — an extra 10% off the sale price applies to $90, giving $81, a total saving of 32.5%, not 35%. Retailers know shoppers add percentages; the calculator's chaining (run the result through again) keeps you honest.
Coupon fine print interacts with percentages in one more way: '20% off one item' versus '20% off the order' differ by which amount is the base — the single most valuable question in all percentage math (see the percentage calculator). Apply the discount to the largest eligible item when the coupon allows a choice.
Tipping norms beyond restaurants
Delivery drivers: 15–20% of the order, with a floor of a few dollars on small orders and extra for distance or weather. Rideshares: 10–20% is customary, more for exceptional service. Bars: $1–2 per drink or 15–20% of the tab. Hair and personal services: 15–20%. Hotel housekeeping: a few dollars per night, left daily since staff rotate. Counter service with a tip screen: genuinely optional — small amounts for good service are common but not obligatory.
Norms differ sharply by country — in much of Europe a small round-up suffices where service is included, and in Japan tipping can cause confusion — but within the US the percentages above are the working standard, and this calculator is calibrated to them.
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Frequently asked questions
How much should I tip at a restaurant?
In the US, 15–20% of the pre-tax bill is standard for sit-down service — 18% on an $85 bill is $15.30. Tip toward 20% or above for excellent service; in major cities and for large parties, the norm sits at the top of the range.
Should I tip on the pre-tax or post-tax amount?
Convention says pre-tax: the tip rewards service, and tax is not service. The difference is small (on an $85 bill with 8% tax, tipping on the total adds about $1.22 at 18%), and many people tip on the total for simplicity — but the pre-tax figure is the defensible standard, and it is what you should enter here.
How do I split a bill evenly?
Add the tip first, then divide the total by the number of people — the calculator's per-person figure. For an $85 bill with an 18% tip split two ways, that is $100.30 ÷ 2 = $50.15 each. Rounding each share up to the next dollar is a common, server-friendly convention.
What is 20% off $120?
The discount is $24, so you pay $96. A common error is answering $24 — that is the discount amount, not the price. Discount mode in this calculator always headlines the price you pay to prevent exactly that mix-up.
Do discounts stack additively?
No — successive discounts multiply. 25% off followed by 10% off is 0.75 × 0.90 = 0.675 of the original price, a 32.5% total saving, not 35%. Chain the calculator: run the first result through as the new price.