Weight of teak planks

[gentoo]

I've baought some teak planks from someone and need to know the weight of them as I'm using a courior to deliver them. The person I'm buying them off doesn't know the weight so figured someone here could give a good estimate.
They're (in inches) 100x7x0.5 in real teak.

 

[2scoops0406]

Somewhere between 3.61 kgs (7.94 lbs) and 4.13 kgs (9.01lbs) per plank of the dimensions given.

Assuming the density of teak is between 630kgs/m3 and 720kgs/m3

Google and calc, amazing 'aint it!

 

[gentoo]

Thanks.

 

[big-all]

add 50 % if stored uncoverd and are wet

 

[splinter]

add 50 % if stored uncoverd and are wet

And add 100% if really wet