Independent comparisons. We may earn from shop links. More info

Cooking grill mat vs under grill mat

Updated: 23 October 2026

You have two amazon.co.uk tabs open and both titles say grill mat. One is a thin sheet about 40 cm across. The other is a pad you could stand a kettle barbecue on. Cooking grill mat vs under grill mat is that split: food on the bars, or drips on the floor. Centimetres decide which object you are looking at. Stars do not. The [grill mat comparison](/hub/grill-accessories/grill-mat) lists both groups with the prices and size lines from the listings. This page does not pick a winner inside either group. Buying one to do the other job wastes the money and, on a lawn, can still leave a brown patch.

You have two amazon.co.uk tabs open and both titles say grill mat. One is a thin sheet about 40 cm across. The other is a pad you could stand a kettle barbecue on.

Our top picks

Lukata Lukata 3-pack, 50 × 40 cm

Best overall

Lukata Lukata 3-pack, 50 × 40 cm
8.7/10about £10.85
View offer
GQC GQC 6-pack, 40 × 33 cm

Best value

GQC GQC 6-pack, 40 × 33 cm
8.5/10about £8.99
View offer
FIREWESS FIREWESS under-grill pad

Alternative

FIREWESS FIREWESS under-grill pad
7.7/10about £17.99
View offer
On this page
  1. 1.Two jobs, one name
  2. 2.The size test on the cooking sheets
  3. 3.The size test on the floor pads
  4. 4.What you lose if you swap them

Two jobs, one name

A cooking sheet lies on the grate. Here it is fibreglass, usually PTFE-coated, and food is meant to touch it. Shelf prices run from about £4.99 with no reviews on Hongmeru to about £11.99 on Ankier. UK reviews mention cleaner bars and fat that sits until the food fries. An under-grill mat lies on the ground. VinBee, Alckijy, and FIREWESS are the pads, about £18.99, £12.85, and £17.99. A UK FIREWESS review that cooks on the racks is the swap this page is trying to stop. The Smoke Signal makes the same cut: deck pads for drips, cooking sheets for fish and eggs. A silicone side-shelf mat is neither, and it was not kept.

The size test on the cooking sheets

Bear Creek’s guide treats about 15 × 13 inches as a grate sheet and something near 48 inches as a deck pad. The same test works in centimetres when a listing prints two sizes. Cookey, Ankier, and the GQC six-pack state about 40 × 33 cm. The other GQC pack states about 40 × 30 cm, and its item count says 1. Linda's states 41.3 × 58.4 cm. Lukata states 50 × 40 cm. QH7 states 180 × 40 cm, one sheet you cut, though the form field says square.
Lukata Lukata 3-pack, 50 × 40 cm

Testsieger

Lukata Lukata 3-pack, 50 × 40 cm
8.7/10about £10.85
View offer

The size test on the floor pads

Alckijy lists 100 × 150 × 0.5 cm at 950 g. That footprint is a patio, not a burger. VinBee’s title says 122 × 76 cm, and a feedback dimension says 10 × 10 × 10 mm. Those cannot both describe the pad. The material line is fibreglass cloth and polypropylene, which is not a food surface. FIREWESS’s title says 75 × 120 cm and a bullet says 24 × 42 inches. Those are not the same rectangle. A photo of a kettle on a dark pad is not the test. The FIREWESS review that cooked on the racks is the swap in real life. Two sizes that do not convert into each other are a conflict, not a choice of units.

What you lose if you swap them

Three 40 × 33 cm sheets do not cover the splash zone under a kettle, and a sheet that has been on the ground is not a clean grate liner. Reviews argue about char and smoke. They do not argue that the sheet protects a lawn. A floor pad under food is the wrong material. VinBee’s fibreglass cloth and polypropylene, Alckijy’s 1800°F line, and FIREWESS’s 2000°F bullet are not food-contact instructions. Regulation 1935/2004 is the UK frame for a surface that touches dinner, and these pads are not presented against that job. One review cooking on a FIREWESS pad does not make it a non-stick sheet. You can own both. They do not substitute. Scorch on artificial grass is under grill mat for decking.

Common questions

How do I tell from the title alone?
You often cannot. Grill mat and fire pit mat are used for both. About 40 × 33 cm, 50 × 40 cm, 41.3 × 58.4 cm, or 180 × 40 cm is a cooking sheet here. About 100 × 150 cm, 122 × 76 cm, or 75 × 120 cm is a floor pad. Two sizes that do not match have not told you what will arrive.
Will a floor pad cook a burger?
No. VinBee, Alckijy, and FIREWESS are pads for under the barbecue. A review that cooked on the FIREWESS racks shows the mix-up, not a method. The 1800°F and 2000°F bullets are seller lines for the pad, not a cooking temperature.
Will three 40 cm sheets protect a new patio?
No. Three sheets of about 40 × 33 cm cover part of a grate. Fat that misses them still hits the porcelain. A patio needs a measured floor pad, such as Alckijy’s stated 100 × 150 cm, and even that pad does not promise the grass stays green.
What if the listing gives two sizes?
Treat it as a conflict until one line is the one you can live with. FIREWESS states 75 × 120 cm and 24 × 42 inches. VinBee states 122 × 76 cm and 10 × 10 × 10 mm. One GQC pack says both six mats and one item. Measure the grate or the patio against a single stated size.
Is a silicone side-shelf tool mat either of these?
No. A small silicone mat for tools on a side shelf was not kept here. It will not stop a fish falling through the bars, and it will not catch a kettle’s drips. Close that tab and go back to the centimetres.
Which page do I open after I know the job?
For a sheet, open best reusable BBQ mats. For a pad, use the deck page linked above. If the sheet is already in the house, how to use a BBQ grill mat covers flame, knives, and washing. Do not use the best-sheet page to judge a lawn.

Related pages

Grill mat buying guide

Grill mat

Best reusable BBQ mats: which listing fits the job

Under grill mat for decking: patio drips, not turf

How to use a BBQ grill mat on the bars, not in flame

Sources

Public UK sources used for this comparison. Listing prices, stars, and review counts are the amazon.co.uk figures in the category files.

  1. Regulation (EC) No 1935/2004 (retrieved 22.10.2026)
  2. SI 2012/2619 (retrieved 22.10.2026)
  3. FSA food contact materials authorisation guidance (retrieved 22.10.2026)
  4. Bake-O-Glide temperature limits (retrieved 22.10.2026)
  5. HSE PPS13 (retrieved 22.10.2026)
  6. NCBI Polymer Fume Fever (retrieved 22.10.2026)
  7. Floordirekt Turin listing (retrieved 22.10.2026)
  8. Consumer Rights Act 2015 (retrieved 22.10.2026)