How to calculate your grout requirements

[tfs]

Hi guys,

I know many of you may know this already with your preffered grouts but I have seen many posts over the years on the forum when people are asking how to calculate how much grout they need.

For the guys that dont know, this is how we do it;

(Tile width 300MM + tile length 300MM) x grout width4MM x tile depth 10MM x grout density 1.6 (usualy between 1.4 to 1.6)

= 38,400 (A)

THEN CALCULATE

(Tile width300mm x tile length300mm)

= 90,000 (B)

Once you have these to figures you simply divide A by B

38,400 / 90,000 = 0.426 (MEANING YOU NEED 0.426KG og grout per sq metre of tiles)

width + length x grout width x tile depth x grout density = a

width x length = b

a/b = kg of grout per sqm of area

Here are some grout density factors for some products

MAPEI Products
ultracolour = 1.6
kerracolour ff = 1.5
kerracolour gg = 1.6

kerapoxy = 1.5

WEBER Products
weber.joint wall = 1.4
weber.joint wide = 1.6
weber.joint wideflex = 1.6
weber. joint epoxy = 1.6

AREDX products
ardex flex fs = 1.5
ardex flex fl = 1.75

This is how its done, and in my opinion it's fairly accurate and it is especialy handy when working with mosaics.

 

[peckers]

very useful post

 

[tfs]

cheers

 

[david campbell]

well explained mate

 

[aph257]

i use this excel spreadsheet. this is just a view of it as i can't attache spreadsheets. but as you can see all you do is enter the details and it gives you the answer. If anyone wants a copy pls PM me with email address.:8:

 

[PJ Tiling]

**Flashbacks to school*** :bigcry:

 

[DHTiling]

Top post..

 

[White Room]

Maths, never my best subject

 

[Daz]

Great post.

Though, I have to admit that I just go by gut feel and experience. Perhaps that explains why I've got a lockup full of 1 kg bags of grout :mad2:.

 

[Time's Ran Out]

Very informative
But I also buy more than I need for that 'just in case' moment.
'It'll come in handy for the next job' is the usual confirmation if required.

 

[Rob Z]

I use Laticrete products, and this is their spreadsheet calculator:

LATICRETE® International > Contractors > Coverage Calculations

Note there is a metric spreadsheet and an imperial spreadsheet.

FYI, if you're not familiar with Laticrete products...use the "1500 Grout" tab for sanded grout, and use the "1600 Grout" tab for unsanded grouts.

 

[tfs]

Very informative
But I also buy more than I need for that 'just in case' moment.
'It'll come in handy for the next job' is the usual confirmation if required.

nothing worse than having to go back to the shop to finnish off less than a sq metre of floor or something. I guess grout quantity most of the time too, unless its a large area or something a bit more tricky like mosaics.

9 times out of ten I just get a 5kg bag to do a kitchen floor or can even get bathroom walls done (tile size permitting ofcourse)

I guess if youve got a decent relationship with the tile shop they will let you take it back in exchange for something else.