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.

[Robert Fogt]

Originally Posted by Tantarado

1. kg/m3 to kg/m2

You multiply by meters, not divide.
kg/m³ * m = kg/m²

Originally Posted by Tantarado

2. kn/m2 to lbs/in2

kn/m² * 0.14503774 = lbf/in²

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.

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!

just like to add-up

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.

[Robert Fogt]

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.

how many lbs would 250kpa be