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#1
06-30-2007, 08:31 PM
Kn/m2 to Kpa

Hi guys,

Just like to know the proper procedure in converting the following:
1. kg/m3 to kg/m2
(unit weight of concrete devide by nominal thickness of concrete
i.e. 2,400 kg/m3 / 0.09318m = 25,756.6 kg/m2, is this correct?)

2. kn/m2 to lbs/in2

3. lbs/in2 to Kpa

Thanks in advance to those that will be helpin' me out on this.
#2
07-01-2007, 12:09 AM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,416 Rep Power: 12
Re: Kn/m2 to Kpa

Quote:
 Originally Posted by Tantarado 1. kg/m3 to kg/m2
You multiply by meters, not divide.
kg/m³ * m = kg/m²

Quote:
 Originally Posted by Tantarado 2. kn/m2 to lbs/in2
kn/m² * 0.14503774 = lbf/in²

Quote:
 Originally Posted by Tantarado 3. lbs/in2 to Kpa
lbf/in² * 6.8947573 = kPa

A kilopascal (kPa) is the same as a kilonewton/square meter (kn/m²). so number 2 and 3 are very much related.
#3
07-01-2007, 02:17 AM
Re: Kn/m2 to Kpa

Quote:
 Originally Posted by Robert Fogt You multiply by meters, not divide. kg/m³ * m = kg/m² kn/m² * 0.14503774 = lbf/in² lbf/in² * 6.8947573 = kPa A kilopascal (kPa) is the same as a kilonewton/square meter (kn/m²). so number 2 and 3 are very much related.

Thank you for the prompt reply this has been a very big help!
#4
07-01-2007, 02:38 AM
Re: Kn/m2 to Kpa

Is kg/m3 * m3 = kg/m3? i forgot to list it in my previous querry.

i.e. unit weight of concrete multiplied by the calculated volume - will the product be still kg/m3?

Again, Thanks in advance for the replies.
#5
07-01-2007, 12:00 PM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,416 Rep Power: 12
Re: Kn/m2 to Kpa

No, it would be:

kg/m³ * m³ = kg

Its just regular algebra, the m³ cancels each other out.

What you have is the volume, multiplied by the density, gives you the weight.
#6
09-24-2007, 06:22 PM
 Unregistered Guest Posts: n/a
Re: Kn/m2 to Kpa

how many lbs would 250kpa be

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