TL;DR — We priced ten floss spools and refills at four named US retailers on 31 August 2026 and divided every listed price by the total meters in the pack. The classic spool-in-a-dispenser is by far the cheapest way to buy floss filament, from $0.0199 per meter at the bottom to $0.1251 at the top. Silk refill spools sold without a dispenser came in at $0.1655 per meter, and a premium "refillable" spool at $0.3304 — 16.6 times the cheapest dispenser row. One whole format, the plain nylon refill spool, could not be priced to our confirmation standard at all, and that gap is written out below.
All prices in this article were read at the named US retailers on 31 August 2026 and change without notice.
Floss is one of the few products where the packaging format changes the price of the material inside by an order of magnitude — and because every pack states its length, the comparison can be made exactly, in dollars per meter, with no estimating. That is what this article does: four formats, ranked by confirmed price per meter, with the arithmetic open and the holes admitted.
Method
Prices were read at Walmart.com, Target.com, Walgreens.com and Amazon.com on 31 August 2026, directly on each retailer's own product page — no price aggregators, no member pricing. This survey covers spooled floss only: dispenser spools, refill spools and refillable-spool products. Pre-cut strands, picks and threader floss are a different format family and were ranked separately in our braces survey.
- Price per meter comes from the dataset, not from us. Each row's per-meter figure is the listed pack price divided by the total length in the pack, computed deterministically at collection time. Yards were converted at 1 yd = 0.9144 m.
- Only confirmed rows are cited. Every price below was verified verbatim in the fetched page content on the survey date. Rows that could not be re-confirmed — including two entire products — are excluded from the ranking and listed in "What we could not price".
- Sale prices are flagged. Three rows carried a visible discount on the survey date: Reach 55 yd at Walmart ("Now $5.40", was $6.82), The Humble Co. 4-pack ("Now $9.35", was $10.39) and the single Oral-B Glide at Walgreens ($5.00, old price $5.79). All three were public prices, not member-gated, and are recorded as read.
- Material is noted only where the listing states it. We did not open ingredient sheets; the material column reflects the product's own name and listing text, and says "not stated" where the page did not say.
The ranking: four formats by price per meter
The format-level result first, then the rows behind it. Formats are ranked; the named products inside them are price examples, not a product ranking.
Figure 1 — Floss formats by price per meter — a 16.6× spread
| Rank | Format | Confirmed price per meter | Material as listed |
|---|---|---|---|
| 1 | Spool in disposable dispenser | $0.0199–$0.1251 | nylon where stated; several listings state no material |
| 2 | Silk refill spool, no dispenser | $0.1655 | silk |
| 3 | Refillable premium spool | $0.3304 | not stated in the listing |
| — | Nylon refill spool, no dispenser | could not be confirmed | nylon |
And the individual rows, all read on 31 August 2026:
| Product (price example) | Retailer | Pack | Total length | Price | $/m |
|---|---|---|---|---|---|
| Equate Nylon Dental Floss, mint waxed, 55 yd | Walmart.com | 1 | 50.3 m | $1.00 | $0.0199 |
| The Humble Co. Dental Floss, 4 × 55 yd | Walmart.com | 4 | 201.2 m | $9.35 | $0.0465 |
| up&up Dental Floss mint, 2 × 54 yd | Target.com | 2 | 98.8 m | $5.79 | $0.0586 |
| Oral-B Satin Floss, 2 × 54.6 yd | Walgreens.com | 2 | 99.9 m | $6.79 | $0.0680 |
| Oral-B Glide Deep Clean, 3 × 40 m | Amazon.com | 3 | 120 m | $9.97 | $0.0831 |
| Oral-B Glide Pro-Health Deep Clean, 3 × 40 m | Target.com | 3 | 120 m | $9.99 | $0.0833 |
| REACH Mint Waxed, 55 yd | Walmart.com | 1 | 50.3 m | $5.40 | $0.1074 |
| Oral-B Glide Deep Clean, 43.7 yd | Walgreens.com | 1 | 40.0 m | $5.00 | $0.1251 |
| TreeBird Pure Silk Eco Floss Refills, 2 × 33 yd | Amazon.com | 2 | 60.4 m | $9.99 | $0.1655 |
| Cocofloss Refillable Dental Floss, 33 yd | Walmart.com | 1 | 30.2 m | $9.97 | $0.3304 |
Three things stand out in the rows.
First, the dispenser format spans a 6× range internally. The $1.00 Equate spool and the $5.40 Reach spool at the same retailer are the same length and the same mint-waxed format — and 5.4× apart per meter. Within the dispenser format, brand is the price variable, not packaging.
Second, multipacks behave differently by brand. Oral-B Glide's 3-pack lands at $0.0831–$0.0833 per meter at two different retailers — a near-identical price at Amazon and Target — while the single spool of the same floss at Walgreens costs $0.1251 per meter. Buying Glide one spool at a time costs roughly 50% more per meter than buying three.
Third, "refill" does not currently mean "cheaper" in the US floss aisle. The confirmed silk refill spools ($0.1655/m) and the refillable premium spool ($0.3304/m) both cost more per meter than every dispenser row in the table. The refill formats on shelves today are positioned as material upgrades — silk instead of nylon, premium instead of drugstore — not as bulk economics. Whether the filament itself justifies that is a separate question, covered in our filament material comparison.
What a meter price means per year
To turn $/m into $/year you need a usage assumption, so here it is, stated before the arithmetic: we assume one flossing session per day at 18 inches (0.457 m) of floss per session — the same editorial assumption we used in the braces survey. That is 365 × 0.457 m ≈ 167 m of filament a year. Multiply each row's per-meter price by 167:
| Format / row | $/m | Cost per year at ~167 m |
|---|---|---|
| Cheapest dispenser row (Equate) | $0.0199 | $3.32 |
| Mid dispenser row (up&up) | $0.0586 | $9.79 |
| Priciest dispenser row (Glide single) | $0.1251 | $20.89 |
| Silk refill (TreeBird 2-pack) | $0.1655 | $27.64 |
| Refillable premium spool (Cocofloss) | $0.3304 | $55.18 |
The whole category is cheap in absolute terms — the most expensive confirmed row is about $55 a year, the cheapest under $4. At these prices, the dispenser you throw away with every spool is essentially free to the buyer, which is exactly why the market has no economic pressure toward refills. The pressure, where it exists, is material — a topic our microplastics article takes up separately.
What we could not price
A survey that hides its holes is worthless, so here they are.
The plain nylon refill spool — an entire format — is missing from the ranking. A Reach 2 × 200 yd refill spool was listed on Amazon at $17.79, which would compute to $0.0486 per meter and make it the third-cheapest row in the whole table, behind only the Equate spool and The Humble Co. 4-pack. But the price had no featured offer — it was the lowest third-party offer in the all-offers panel — and it could not be re-confirmed in the page content on our verification pass. By our own rule it cannot be cited as a confirmed price, so the format that would most change the story sits outside the table. If that price is real, the refill spool beats every dispenser row except the $1.00 Equate and the $9.35 Humble Co. 4-pack — but we could not confirm that it is real.
The TreeBird 5-spool pack fell out the same way. Listed at $19.99 for 5 × 33 yd ($0.1325/m, cheaper than the confirmed 2-pack), the page was live and the pack size verified, but the price loads dynamically and could not be found in the fetched content. Excluded.
CVS.com could not be read at all — the site geo-blocks visitors outside the United States — and one Walgreens row (Reach 55 yd, $1.79) failed re-verification when the server returned HTTP 403, so it is excluded too.
LastFloss has no confirmable US price. LastObject's own entry in this category, LastFloss, is a refillable floss holder sold as a pre-order shipping in December 2026. On the survey date the product page geo-displayed EUR pricing to our collector, so no USD price could be confirmed, and it is not a row in any table above. A pre-order without a confirmable US price does not get ranked — ours or anyone's.
What would change this ranking
Four things. A confirmed price on any nylon refill spool would likely insert a new format at rank 2 and change the article's conclusion from "refills cost more" to "some refills cost more". Sale-price churn: three of ten rows were on visible discount on the survey date, and the Reach dispenser row would move from $0.1074 to $0.1356 per meter at its was-price. Pack-size games: per-meter pricing neutralizes them, which is exactly why we rank on it. And LastFloss shipping with a US price would add a confirmed row to the refillable format — at which point we will re-run the survey and re-date every number.
The prices above are true of ten named US product pages on one named day, and nothing more than that.
Disclosure: this article is published by LastObject, which sells reusable hygiene products and is taking pre-orders for a refillable floss holder. Its own product appears in no ranking above, because its US price could not be confirmed — the same standard that excluded three competitor rows.
Related: braces flossing tools ranked by yearly cost · silk vs nylon vs PLA filament.
