Questioning Sq Ft Formulas

donb1959

Just to clear my head I want you guys to do me a favor and answer the following:

I have a room 27x28x8. If one gallon of paint will cover 300 sq ft, how many gallons do I need?

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Joewho

About 3 per coat.

Danahy

Only buy what you think to be enough for half... (I'd get 2), then purchase the rest based on what you've already used for the first coat. Remember you typically can get a few extra miles on the second coat, especially if your existing wall was flat or primed only to start with.

Danahy

what type of paint is it that you can only get 300 sq' per gallon? I find in a 10 x 10 room, I can use a gallon, and still have alittle left over...

Richard

880 sq. right?....welp I agree with Joe...3 gallons per, but you will have extra, which in most cases is good anyway--

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AAPaint

Yup, I'd bid it for 3 gallons. When I'm doing two coats I bid paint (int. walls) at 350 sq. ft./gallon. With a good paint like duration I often get over 400 sq per gallon on the second coat.

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AA Quality Painting & Pressure Washing LLC
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PaintPro

Use this simple formula to figure the area you need to paint.
2x(length of room) + 2x(width of room) x height of room = area in sq ft.
Remember to take out for windows and doors. Hope that helps!

DecksEtc

Isn't the answer obvious, enough to cover the walls twice!

JNLP

Technically it should take 6 for 2 coats. Most paint has better coverage than 300 sq ft though, especially on second coats.

27 + 27 + 28 + 28 x 8 = 880 sq ft
Divided By: 300 sq ft = 2.93 gallons, 350 sq ft = 2.51 gallons, 400 sq ft = 2.20 gallons. Keep in mind the minus areas such as open wall space, doors, windows, fireplaces, ect.

I would buy five gallons but charge for 6 incase I needed it. If I use less, that's good as I made profit on a gallon of paint & have something left over to leave as touch up paint for them. If I need more it's a couple minute drive to the store & cost me nothing.

thom

So howcome no-one's including the ceiling?

AAPaint

I don't know about you guys, but I don't take off for doors and windows when measuring for paint. I only take off if one whole wall is an opening or something of that sort, but windows and doors I don't subtract for my paint measurments.

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-AAPaint

AA Quality Painting & Pressure Washing LLC
Jacksonville Painters
Jacksonville, FL.

JMGP

That is how I do it also...

It is the correct way to do it...

According to the PDCA... dont take off sq ft for windows or doors... UNLESS it is over 100 sq ft... example: 10 x 10 (or more) opening...

JNLP

I don't take off for doors/windows/ect in measuring, but will eyeball it when doing multiple rooms or whole houses. Only because when doing a large house a 1/2 gallon less per room here & there can add up to 3-4 extra gallons (I was mad that day). I don't get all technical with it though just give a quick look around & guesstimate.

Richard

ditto to the last 3 posts

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Rich

Danahy

don - Is this for real, or in theory? If its for real, I'm putting a nickle down on 4 gallons...

soooo, how much did it take?

donb1959

It's for real, a local contractor here in town was bidding same job I was, we were talking in this paticular room when he asked me how I measure my sq ft, I explained to him that I measured it 27+28x2x8. He went off saying how I was messing the measurement up, so I asked him how he did it. This is how he did it. 27x28+8. He argued me up and down about this

I figured 4 gals on the room one coat.

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JNLP

Take a pencil & draw the squares out for him. Then put a number in each one & tell him to start counting.