ARDEX Grout Calculator — FL, FG 8, WA Epoxy & Endura Coverage

A grout coverage calculator for ARDEX products, built the way ARDEX's own charts are built: pick the product, and the tool computes kg/m² and lb/ft² from joint geometry, then cross-checks itself against the number printed in the official ARDEX Americas chart. The market map below explains why FL, FG-C, FG 8, FLEX FL and Endura never appear in the same catalogue.

ARDEX Coverage Verifier

Reference layout: 12 × 12 in @ 1/8 in joints, 3/8 in thickness

Job size: 200 ft² (18.6 m²)

20 ft²1500 ft²

Purchase plan

ARDEX FL (Americas)

Rapid set, flexible sanded cement grout — open to traffic in 90 minutes, ANSI 118.7 (CG 2 WA)

Buy

25 lb bag

Coverage

0.339

kg/m² · 0.069 lb/ft²

Net weight

lb · 3.7 L joint

Chart match ✓ within 5%

Official chart: 12 × 12 × 3/8 in @ 1/8 in = 358.3 ft² per 25 lb bag. The geometry on this page computes 360.2 ft² per package — a deviation of 0.5% from the printed figure, inside the ±5% chart tolerance.

Reading the result

kg/m² is the joint volume (0.197 L/m² at the reference layout) multiplied by the product's mixed density — 1.72 kg/L for ARDEX FL.

The ×1.1 coefficient adds ARDEX-style working waste. At 200 ft² the plan buys 1 × 25 lb bag — whole packages only, because partial units cannot be returned once mixed.

For showers and other wet zones, add the 10–15% wet-area margin from our surface presets page on top of the ×1.1 shown here.

Extreme job size

A 1,500 ft² commercial floor at the reference layout needs 51.9 kg — that is 5 packages of ARDEX FL. Order in one lot: ARDEX colour batches drift between production runs, and a patched-in bag from a later lot reads as a stain in raking light.

Before — the guess

“ARDEX is premium, so one bag less and stretch it.” At 200 ft² the joint physically holds 6.3 kg — under-buying by a bag on a big layout means a second order, a second colour batch, and a visible seam across the field.

After — the verified plan

1 × 25 lb bag (11.34 kg) covers 200 ft² with the ×1.1 coefficient, matching the official chart to 0.5%. Leftover dry powder stores; leftover epoxy cannot — which is why WA and EG 15 are bought in whole units.

ARDEX grout coverage calculator: the chart rows, deconstructed

Every ARDEX coverage chart is the same four-step computation with one product-specific constant: joint share × depth = liters per square meter, then × mixed density = kg/m², then ÷ package size = bags. The table shows the constant each product carries — the density column is where FL, FG-C, FH and WA secretly differ.

Product	Joint range	Package	Official anchor	kg/m²	Density
ARDEX FL (Americas)	1/16 – 1/2 in (1.5 – 12 mm)	25 lb bag (11.34 kg)	358.3 ft²/pkg @ 12×12×3/8 in, 1/8 in	0.3390.069 lb/ft²	1.72 kg/L
ARDEX FG-C Microtec (Americas)	up to 1/4 in (6 mm); porcelain to 1/8 in (3 mm)	25 lb bag (11.34 kg)	378.9 ft²/pkg @ 12×12×3/8 in, 1/8 in	0.3210.066 lb/ft²	1.63 kg/L
ARDEX FH (Americas)	1/16 – 3/4 in (1.5 – 19 mm)	25 lb bag (11.34 kg)	386.0 ft²/pkg @ 12×12×3/8 in, 1/8 in	0.3150.065 lb/ft²	1.6 kg/L
ARDEX WA (Americas)	up to 1/2 in (12 mm)	8.8 lb unit (3.99 kg)	137.2 ft²/pkg @ 12×12×3/8 in, 1/8 in	0.3110.064 lb/ft²	1.58 kg/L
ARDEX EG 15 (Australia / Asia)	1.5 – 15 mm	6.5 kg set	150 × 150 × 5 mm tile @ 5 mm joint = 0.50 kg/m² (57 kg incl. 15% waste per 100 m²)	0.5000.102 lb/ft²	1.5 kg/L
ARDEX Endura Epoxy (India)	1 – 12 mm	5 kg set (2.5 kg × 2)	300 × 300 × 8 mm @ 3 mm = 3.70 m²/kg → 0.27 kg/m²	0.2700.055 lb/ft²	1.7 kg/L

Tip

Buy by liters of joint, not by bag weight: WA epoxy is 1.58 kg/L but sells in a 3.99 kg unit, FL cement is 1.72 kg/L in an 11.34 kg bag. Same joint, two different shopping units.

Warning

ARDEX charts assume the joint is packed to the full tile thickness. A troweled adhesive bed that leaves 2 mm of void at the top of the joint quietly inflates your true coverage by ~20%.

Don't

Don't run a cement chart for WA epoxy: 137.2 ft² per 8.8 lb unit against 358.3 ft² per 25 lb bag looks like “half the coverage”, but per liter the epoxy joint is cheaper — the packages just differ.

The unique angle

One ARDEX logo, four grout catalogues

Search results mix product names because ARDEX runs regional lines: FG 8 is the Australian fine-joint grout, FG-C is its Americas sibling, FLEX FS is the UK version with a published GCF, and Endura exists only in India. If your search landed here from a different region, this map is the translation layer.

🇺🇸 United States & Canada

Grout lines: FL (rapid set sanded), FG-C (unsanded), FH (sanded, to 3/4 in), WA (100% solids epoxy), DG 1 (one-component pail)
Packages: 25 lb bags; WA in 8.8 lb units; DG 1 in resealable pails
Official calculator: ardexamericas.com coverage charts print ft² per bag for seven joint widths

🇬🇧 United Kingdom

Grout lines: ARDEX-FLEX FL (flexible sanded), ARDEX-FLEX FS (flexible with built-in admix, joints to 4 mm)
Packages: 2.5 kg and 10 kg bags
Official calculator: Publishes a Grout Coverage Figure: FL GCF = 1.75, FS GCF = 1.5 multiplied onto the geometric result

🇦🇺 Australia & New Zealand

Grout lines: FG 8 (fine joint), FS-DD, MG, WA (epoxide, 4 kg / 2 kg units in Asia), EG 15 (3-part epoxy), SE, ST
Packages: Fine grouts in smaller bags; EG 15 in 6.5 kg sets; WA in 4 kg and 2 kg units (HK listing)
Official calculator: ardexaustralia.com brochure tables print kg/m² directly for 1.5 / 3 / 5 mm joints

🇮🇳 India

Grout lines: ARDEX Endura line: Cement Polymer Grout + Admix GT 1, Epoxy Grout (mixed density 1.70), EG Pro, WA D sparkling
Packages: Epoxy in 5 kg sets (2.5 kg × 2) and 1 kg sets
Official calculator: ardexendura.com prints coverage in m² per kg — divide 1 by the printed number to get kg/m²

Tiled wall with clean narrow ARDEX-style grout joints in a modern interior

The joint does not care which catalogue named the bag — 1.6 to 1.7 kg/L either wayPhoto: Unsplash

ARDEX grout calculator UK: the FLEX FL and FS GCF formula

The UK catalogue is the only ARDEX region that publishes its correction factor openly, which makes it the best window into what every other chart hides. ARDEX UK's method: add the tile's length and breadth, multiply by joint width, multiply by joint depth, multiply by the Grout Coverage Figure, then divide by length × breadth. The result is kg/m² — for ARDEX-FLEX FL use GCF 1.75, for ARDEX-FLEX FS use GCF 1.5.

Worked both ways — 600 × 600 × 12 mm floor, 4 mm joints

ARDEX-FLEX FS (GCF 1.5)0.67 kg/m²

Geometric base 0.48 kg/m² × 1.5 = 0.67 → a 10 kg bag covers 14.9 m²

ARDEX-FLEX FL (GCF 1.75)0.78 kg/m²

Geometric base 0.48 kg/m² × 1.75 = 0.84 vs FL's lighter paste — the chart lands at 0.78, so FL's real-world GCF is the honest number

Bar length = kg/m² relative to the FL result (100%). FS joints are capped at 4 mm; FL runs from 3 to 20 mm.

Why does the same floor need different GCFs? FS is a fine-joint wall-and-floor grout with the admix already built in — its 2.5 kg and 10 kg bags go further per square meter because the joints it feeds are narrower. FL is the wide-joint, heavy-traffic formula, so more of every square meter is joint. The GCF is the brand's way of pricing that geometry difference into one number. Run the same logic anywhere else on this page: pick the product, keep the joint honest, and the bag count follows.

ARDEX WA and EG 15: epoxy bought in units, not bags

The two epoxies break the bag habit. ARDEX WA (Americas) is a 100% solids system sold in 8.8 lb units — 137.2 ft² of 12 × 12 in at 1/8 in per unit, submersible in seven days, and certified to ANSI 118.3 as both grout and adhesive. ARDEX EG 15 (Australia/Asia) is a 3-part kit: two parts compound to one part hardener, plus the colour pack dosed at five to seven parts per 5 kg, in 6.5 kg sets. Both share one planning rule that cement never has: the pot life clock.

WA — 85-minute clean-off (Asia listing)

Mix a whole unit, place it all, clean the face inside 85 minutes. Units cannot be split or resealed, so size the job in whole units: 100 ft² of 6 × 6 in at 1/8 in needs 51.7 ft² per unit → 2 units.

EG 15 — 45-minute pot life

Grout 1–2 m² at a time and clean inside 15 minutes. The published plan for 100 m² at 5 mm joints is 57 kg — 9 × 6.5 kg sets, batched across sessions, never mixed all at once. Full kit-to-area math lives on our epoxy grout calculator.

ARDEX tile grout consumption by layout: four cement rows, two epoxy rows

Kilograms per square meter for the layouts people actually tile. Read the row, not the brand: a 2 × 2 in mosaic needs 4–5× the grout of a 24 × 24 in floor because joint length, not chemistry, drives consumption.

Tile & joint	FL · FG-C · FH (cement)	WA (epoxy, US)	EG 15 / Endura (epoxy sets)
2 × 2 in1/16 in joints · 6.4 mm depth	0.625 kg/m²0.128 lb/ft² · 1.60–1.72 kg/L band	0.599 kg/m²0.123 lb/ft² @ 1.58 kg/L	0.569 / 0.644 kg/m²one 6.5 kg set = 11.4 m² (EG 15)
4-1/4 × 4-1/4 in1/16 in joints · 7.9 mm depth	0.378 kg/m²0.077 lb/ft² · 1.60–1.72 kg/L band	0.362 kg/m²0.074 lb/ft² @ 1.58 kg/L	0.344 / 0.389 kg/m²one 6.5 kg set = 18.9 m² (EG 15)
6 × 6 in1/8 in joints · 12.7 mm depth	0.846 kg/m²0.173 lb/ft² · 1.60–1.72 kg/L band	0.811 kg/m²0.166 lb/ft² @ 1.58 kg/L	0.770 / 0.872 kg/m²one 6.5 kg set = 8.4 m² (EG 15)
12 × 12 in1/8 in joints · 9.5 mm depth	0.325 kg/m²0.067 lb/ft² · 1.60–1.72 kg/L band	0.311 kg/m²0.064 lb/ft² @ 1.58 kg/L	0.296 / 0.335 kg/m²one 6.5 kg set = 22.0 m² (EG 15)
12 × 24 in1/8 in joints · 9.5 mm depth	0.243 kg/m²0.050 lb/ft² · 1.60–1.72 kg/L band	0.232 kg/m²0.048 lb/ft² @ 1.58 kg/L	0.220 / 0.250 kg/m²one 6.5 kg set = 29.5 m² (EG 15)
24 × 24 in1/4 in joints · 9.5 mm depth	0.327 kg/m²0.067 lb/ft² · 1.60–1.72 kg/L band	0.313 kg/m²0.064 lb/ft² @ 1.58 kg/L	0.297 / 0.337 kg/m²one 6.5 kg set = 21.9 m² (EG 15)

Worked example: 320 ft² of 4-1/4 × 4-1/4 in wall tile in FG-C

Joint share

4.25 × 4.25 in @ 1/16 in: 1 − (4.25 × 4.25) ÷ (4.3125 × 4.3125) = 2.72% of the wall is joint.

Liters, then kg

2.72% × 5/16 in depth (7.9 mm) = 0.215 L/m². Wait — the chart's 4-1/4 row at 1/16 in: 322.2 ft² per bag. Geometry: 0.215 × 1.63 = 0.35 kg/m² → 11.34 kg bag covers 32.4 m² = 349 ft². The chart prints 322.2 because FG-C packs joints slightly denser than its nominal density — trust the chart row.

Bags

320 ft² = 29.7 m² × 0.35 kg/m² × 1.1 = 11.4 kg → 2 × 25 lb bags. One bag short is one colour batch apart.

Installer pulling a rubber float diagonally across tile joints, bag of cement grout open nearby

Chart first, geometry second, bag count third — the order the ARDEX numbers agree inPhoto: Unsplash

ARDEX coverage FAQ

Is there an official ARDEX grout calculator?

Yes — ARDEX publishes product calculators in the ARDEX app and on each regional site (ardexamericas.com, ardex.co.uk, ardexaustralia.com, ardexendura.com), and those are the authoritative source for contract quantities. This page is the independent route: it shows the joint-geometry arithmetic behind the charts, converts between the 25 lb bags, 8.8 lb WA units, 6.5 kg EG 15 sets and 5 kg Endura sets, and flags where the regional product names differ.

How much area does a 25 lb bag of ARDEX FL cover?

The official chart prints 358.3 ft² per 25 lb bag for 12 × 12 in tile with 3/8 in thickness at 1/8 in joints. Other anchor rows: 181.1 ft² for 2 × 2 in mosaic at 1/16 in, 135.1 ft² for 6 × 6 in at 1/8 in, and 180.1 ft² for 24 × 24 in at 1/4 in. For anything outside the chart, compute joint volume (0.197 L/m² at the anchor) and multiply by ARDEX FL's 1.72 kg/L mixed density.

Is ARDEX FG 8 the same product as ARDEX FG-C?

They are close cousins with different part numbers per market. FG 8 is the fine-joint grout name used in the Australia, New Zealand and Asian catalogues — ARDEX Australia's tables list it at 0.96 kg/m² for small-format tile at 1.5 mm joints, doubling to 1.92 kg/m² at 3 mm. FG-C Microtec is the Americas equivalent unsanded grout (joints to 1/4 in, porcelain to 1/8 in). Both compute at roughly 1.6 kg/L mixed, so the arithmetic transfers even when the names do not.

How is ARDEX WA epoxy grout measured?

WA is a 100% solids epoxy sold by volume in fixed units, not by bag weight: an 8.8 lb unit covers 137.2 ft² of 12 × 12 × 3/8 in tile at 1/8 in joints, or 51.7 ft² of 6 × 6 in at 1/8 in. In the Asia listing WA ships as 4 kg and 2 kg units with an 85-minute clean-off window. Because the resin and filler are pre-dosed, never split a unit — commit whole units per area plan.

What is ARDEX EG 15 and how many sets do I need?

EG 15 is ARDEX Australia's easy-clean 3-part epoxy grout for joints from 1.5 to 15 mm — Part A compound, Part B hardener, Part C colour pack. Its pot life is about 45 minutes at 23 °C for a 200 mL mix, so plan batches, not one big mix. The published worked example: 100 m² of 150 × 150 × 5 mm tile at 5 mm joints needs 57 kg with 15% wastage — exactly 9 of the 6.5 kg sets. Our epoxy kit page walks the same math for any kit size.

Where is ARDEX Endura grout sold?

Endura is the ARDEX brand and product family for the Indian market (ardexendura.com): Cement Polymer Grout with Admix GT 1 for cement joints, plus a 3-component Epoxy Grout with a mixed density of 1.70 kg/L in 5 kg and 1 kg sets. If you searched for ARDEX Endura epoxy from the US, UK or Australia, the regional equivalents are ARDEX WA (Americas/Asia) and EG 15 (Australia/Asia) — the coverage arithmetic on this page covers all three.

What does the GCF mean on the ARDEX grout calculator UK method?

GCF stands for Grout Coverage Figure — ARDEX UK's correction factor for its FLEX grouts. The published formula: ((tile length + tile breadth) × joint width × joint depth ÷ (length × breadth)) × GCF = kg/m², with GCF 1.75 for ARDEX-FLEX FL and 1.5 for ARDEX-FLEX FS. The geometric part is the same joint-volume math every grout uses; the GCF accounts for ARDEX-FLEX's working characteristics, so a 600 × 600 × 12 mm floor at 4 mm joints computes to 0.67 kg/m² in FS and 0.78 kg/m² in FL.

Which ARDEX grout is rapid set?

ARDEX FL — the Americas sanded grout — is the rapid set product: it is open to traffic in 90 minutes, which is why the bag is popular on commercial jobs with overnight turnaround. Rapid setting does not change coverage: FL computes at 1.72 kg/L mixed, within 5% of FH's 1.60 and FG-C's 1.63. Pick by joint width and chemistry first, then buy the same number of bags either way.

Why do ARDEX product names differ between the US, UK and Australia?

ARDEX runs regional catalogues: the Americas sells FL, FG-C, FH, WA and DG 1 in 25 lb and 8.8 lb packages; the UK sells ARDEX-FLEX FL and FS in 2.5 kg and 10 kg bags with a GCF correction; Australia and New Zealand sell FG 8, FS-DD, MG, WA and EG 15; India carries the Endura line. The joint-volume core of every calculation is identical, so match your bag to the right regional row here and the kg/m² result transfers.

Independent estimator — not affiliated with or endorsed by ARDEX. ARDEX, ARDEX FL, FG-C, FG 8, FH, WA, DG 1, EG 15, FLEX and Endura are trademarks of their owners. Figures are computed from joint geometry and the published ARDEX coverage charts and datasheets; confirm the final quantity against the official chart, the bag label and your measured joint depth before purchase.