Two readings, $3.49 and $3.69, and neither carries a cup size.
The Burger King Diet Coke price rests on two readings taken in August 2026, $3.49 and $3.69, and neither one carries a cup size. Two figures that close together look like agreement and are really a small sample, so no typical price is published above. No calorie figure exists either, because no drink at all appears in the company's November 2022 nutrition document.
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What you need
4 itemsDiet Coke price and calories
| Item | Typical price | Price range | Calories |
|---|---|---|---|
| Diet Coke | varies | $3.49 – $3.69 | — |
If something goes wrong
The range on this row is tighter than the others
- Cause
- Twenty cents looks like consensus and is not. Only two readings stand behind it, both unsized, and elsewhere in this section a pair of readings on one drink landed $1.10 apart.
- Fix
- Read a narrow band built on two figures as thin evidence rather than as a settled price. More readings usually widen a range instead of tightening it.
What does a small or large Diet Coke cost
- Cause
- No sized reading was recorded for this drink at all, which makes it the only cola-family row in the section without one.
- Fix
- Borrow the ladder from the poured line beside it: $1.99, $2.39 and $2.79 for small, medium and large. A fountain charges by cup, so the same steps should apply.
Is Diet Coke really zero calories here
- Cause
- Burger King has published nothing that says so. Its most recent nutrition document is dated November 2022 and lists no drinks, and the tool that replaced it renders in the browser and could not be read.
- Fix
- Take the figure from the cup or the board in the restaurant. It is almost certainly what you expect, but no company source on this menu confirms it.
Two numbers, twenty cents apart, and what that is worth
This is one of the thinnest rows in the Burger King drinks section, and the page is not going to pretend otherwise. Two readings exist, $3.49 and $3.69. Neither says which cup it describes. There is no company price to check them against, because Burger King publishes none for any US item, and there is no third reading to break the tie or widen the picture.
A twenty-cent gap invites the wrong conclusion. It looks like two independent observations converging on a real national price, and it is nothing of the kind: it is two data points, both unsized, on a menu where the same drink family produced figures from $1.99 to $3.69 depending on the cup. The Soft Serve Cup in the dessert section shows what a second reading can do to a narrow-looking row, since its pair landed $1.10 apart.
What is missing here matters more than what is present. Every other soft drink row in this section produced at least one sized reading. This one produced none.
What's in it
Diet Coke syrup and carbonated water over ice, from the same dispenser as everything else on the poured line. Nothing about the contents is published by Burger King. Not the calories, not the sweetener, not the caffeine, and no allergen listing could be obtained for any item on this menu. The absence is total across the drinks section rather than particular to this row: none of the twelve drinks appears in the November 2022 document, which is the last nutrition the company issued. In practice this is the sugar-free soft drink in the section, and in practice most people know what that means, though no company figure states it.
Is it worth it
Priced as it is, level with the sugared cola beside it, the only argument here is dietary rather than financial. Nothing is saved and nothing extra is paid by switching from Coca-Cola to Diet Coke: both unsized readings match to the cent across the two rows.
Where money is the object, the section has cheaper places to go. Brewed Coffee at $1.99 typical is well under the unsized cola readings, and both are sugar-free. Pure Life Purified Water, from $1.99, is cheaper again than any poured cup recorded above $1.99, and it is the only drink here that travels.
Diet Coke at a glance
- Burger King price
- not published
Questions people ask
How much is a Diet Coke at Burger King?
Between $3.49 and $3.69 on the two readings taken in August 2026, neither of which carries a cup size. No typical figure is published, because two readings cannot honestly produce one.
Why does this row say varies?
Because only two readings exist and both are unsized. Averaging them would produce $3.59, a figure nobody was recorded charging, and printing it would give a guess the look of a measurement.
How many calories are in a Burger King Diet Coke?
No company figure has been published. The newest nutrition document Burger King has issued is dated November 2022 and contains no drinks rows of any kind.
Is this page an official Burger King price list?
No. Neither figure above came from the company. Both were recorded in August 2026, because no US list price is published for anything on this menu.
Can this site tell me the price at my local Burger King?
It cannot, and on this row it has less to work with than on most. Two unsized readings are a starting point rather than a guide to any particular branch.