Oh I like this calculator!!
http://www.convert-me.com/en/ (http://www.convert-me.com/en/)
There are calculators or converters, for mass and weight, length & distance, capacity & volume, area, temperature, weight to volume, etc.....
Did you know 550 gallons of castor oil weighs 4389 lbs (@ 77 degrees F)... from the weight -volume calculator ::)
http://www.concrete.com/calculatorsmaterials.htm
Calculate concrete volume
Volume to fill block wall
Volume of a column
Concrete Block Estimator
http://www.titanamerica.com/tarmac/products/concrete/block/estimating.html
Parabola calculator for solar projects etc.
http://mscir.tripod.com/parabola/
Calculators for all of this:
Foundation
Wall Framing
Crown Molding
Roof Area
Board Footage
Roof Framing Angles
Paint Coverage
Circular Slab
Square Construction
http://www.construction-resource.com/calculators/
I just had the normal calculator on my computer.I think this one is a little more different and more high tech.Includes the conversion and other useful calculator features.
Although not a calculator, maybe someone should move this to the correct thread if any.
I find this lumber weight info useful at:
http://www.engineersedge.com/commercial_lumber_sizes.htm
Placed that in a new topic under Referral Links (http://countryplans.com/smf/index.php?board=3.0)