Weight of steel sheet?

I'm factoring in the finished weight of robot, I'm hoping top and bottom can be 600mmx900mm 2mm or 3mm steel plate. Does anyone know off hand what sort of weight that would come out at? Not after anything scientific, just a rough idea.

this website is grate for calculating sheet material weights

http://www.matweb.com/tools/weightcalculator.aspx

and for 3mm that size its 12.717kg

That's wicked thank you!

Will have a faff with it.

I have a small exe file that can do most of the simple calculations concerning weight, made by one the Swedish roboteers.

2 plates 600*900*2 are 17 kg, in 3mm those are 25.5kg.

Thanks Mario!