Best carpet knife
Updated: October 2026
You want the best carpet knife for a job you can name: fitting most weeks, cutting up one lifted carpet, or buying a Stanley because you trust the brand. A bestseller list will not tell you that. On amazon.co.uk the kept listings in this set are three £12.99 fitter knives, one FatMax at £17.52, and two sprung-arm cutters at £4.99. Prices, stars, and the full table are on the [carpet knife comparison](/hub/cutting-tools/carpet-knife). Peter F. read those lines on 19 October 2026. There is no cutting test behind the picks.
You want the best carpet knife for a job you can name: fitting most weeks, cutting up one lifted carpet, or buying a Stanley because you trust the brand. A bestseller list will not tell you that.
You want the best carpet knife for a job you can name: fitting most weeks, cutting up one lifted carpet, or buying a Stanley because you trust the brand. A bestseller list will not tell you that. On amazon.co.uk the kept listings in this set are three £12.99 fitter knives, one FatMax at £17.52, and two sprung-arm cutters at £4.99. Prices, stars, and the full table are on the carpet knife comparison. Peter F. read those lines on 19 October 2026. There is no cutting test behind the picks.
Our top picks
| Badge | Product | Knife type | Holster | Spare storage | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  TradeUnderlay TradeUnderlay orange carpet fitter knife | Fitter knife with holster | Yes | In the handle | 8.0 | about £12.99 | View offer |
| Alternative |  STANLEY Stanley FatMax heavy duty trade knife FMHT10501-0 | Fixed trade knife | n/a | 10 blades, magnetic | 5.0 | about £17.52 | View offer |
| Best value |  LuLuxinxin LuLuxinxin sprung-arm carpet cutter | Sprung-arm cutter | n/a | n/a | 5.4 | about £4.99 | View offer |
On this page
Best depends on the job
Best in this set means the listing whose limits you can live with, not a lab score. A 4.6 from a short UK sample can sit next to a magnet that fell out. A 4.5 from 213 reviews can still hide a holster that does not cover the tip.
A fitter wants a holster, a thumb screw, and blades they can buy again. A household wants to section one lifted carpet. A Stanley buyer wants the name on the handle and will read the include line. The checks under those picks are on the carpet knife buying guide.
Fitter knife at £12.99
For fitting, the orange TradeUnderlay knife is the top pick: £12.99, 4.5 from 213 reviews, a thumb screw, spare storage, and a holster. The listing ranks it 3rd in Carpet Knives. Reviewers describe a quick blade change and say it takes Stanley-style blades.
Skip it if you need retraction. One UK reviewer wrote that the blade does not retract. Skip it if you will not test the holster: one review said the blade can stick out of the bottom. The include line does not list a blade.
Green and yellow are the same £12.99 bullets. Green’s six UK notes include a magnet and a hinge pin that came out. Yellow’s listing says retractable and non-retractable at once. Neither takes the top pick.
Stanley FatMax when you want the brand
Buy the Stanley FatMax FMHT10501-0 when the name and a clearly fixed knife matter more than a large review file. It is £17.52, 4.5 stars from 19 reviews, non-retractable, with a coarse-thread thumb wheel and magnetic storage claimed for 10 blades. The one UK review praises the magnetic hold. No defect is written down. That is a thin file, not a long proof that nothing goes wrong.
Skip it if you need the Amazon page to list blades and a sheath. The include line says the knife. Stanley’s UK page lists two blades, one 1996 hook blade, and a sheath, and Screwfix has listed it at £14.99 including VAT as a fixed knife. Those are other sellers, not this parcel. There is no holster on the comparison fields. If you only need a hook blade, the FatMax is a second fixed knife, not the missing consumable.
The £4.99 cutter
For one lifted carpet, the LuLuxinxin sprung-arm cutter is the best value: £4.99, 4.1 stars from 24 reviews, an SK5 blade and a single screw. Some UK reviews say it did the job. You are not buying a dolphin knife, a holster, or a spare store.
Skip it if the second cut has to be straight. One reviewer said it worked once, then stuck. The listing asks about a safety lock and does not answer. The other £4.99 cutter has 3.0 from one review: cardboard, not carpet, and notched blades that seemed not to fit. It does not take the value award. No Amazon include line here states a hook blade in the box.
Which pick to leave on the shelf
Take the orange knife for fitting if you will check the holster. Take the FatMax if the Stanley name and a non-retractable listing matter more than review volume. Take the £4.99 cutter only for a trial you can walk away from. Leave all three if you needed proof of retraction. A qualifying purchase through the comparison links can earn a commission at no extra cost to you.
Common questions
Is the Stanley FatMax a better buy than the £12.99 fitter knives?
It is the better buy if you want the Stanley name, a listing that consistently says non-retractable, and storage claimed for 10 blades, and you accept 19 reviews at £17.52. It is the worse buy if you wanted a holster in the Amazon parcel or a review file the size of the orange knife. The manufacturer kit is not the Amazon include line.
Which listing was highest in Carpet Knives in this extract?
The orange knife’s rank is 3rd in Carpet Knives. That is a category rank on amazon.co.uk, not a test win. The green knife’s rank is much lower, 34th, despite 4.6 stars. Rank and stars are answering different questions.
Can I trust 4.6 stars on the green and yellow knives?
You can trust the star line as an Amazon average. You should still read the UK notes. Green’s 4.6 from 135 reviews sits beside six UK reviews that include a magnet and a hinge pin coming out. Yellow’s 4.6 from 130 sits beside a title complaint and a listing that says both retractable and non-retractable. The average does not cancel those notes.
Which pick should I skip if I need a retractable blade?
Skip all of them until you have proved retraction on the knife itself. The FatMax listing says non-retractable. A UK review of the orange knife says the blade does not retract. The yellow fields contradict each other. The £4.99 cutters do not describe a sliding blade. HSE prefers a retractable blade where the job allows, which is an argument for the utility knife you may already own.
Do any of these include a hook blade on Amazon?
Not on the include lines in this extract. The £12.99 lines list a holster. The FatMax line lists the knife. Stanley’s own page mentions a 1996 hook in the manufacturer kit. That sentence is not an Amazon contents list. Buy the blade as its own purchase once you know the mount.
Related pages
Sources
Public UK sources and amazon.co.uk listing lines; retrieved 19 October 2026.
- HSE, Hand knives (retrieved 19 October 2026)
- GOV.UK, Buying and carrying knives (retrieved 19 October 2026)
- Criminal Justice Act 1988 section 141A (retrieved 19 October 2026)
- Consumer Rights Act 2015 (retrieved 19 October 2026)
- Stanley Tools UK, FMHT10501-0 (retrieved 19 October 2026)
- Screwfix, Stanley FatMax FMHT10501-0 (retrieved 19 October 2026)
- Ulster Carpets retailer fitting guide (retrieved 19 October 2026)