Steel Weight Calculator
Calculate steel weight for A36, 1018, 4140, and stainless steels.
Weight Results
MaterialSteel A36
Volume72.00 cu in
Weight (lbs)20.42
Weight (kg)9.26
Weight (tons)0.0102
Add to Project
💡 Did you know? Saving this calculation connects it to our Project Planner, allowing you to bundle multiple estimates (concrete, paint, tile, etc.) into a unified shopping list with shared measurements.
Frequently Asked Questions
How much does a cubic inch of steel weigh?
Carbon steel (A36, 1018, 4140) weighs 0.2836 lb per cubic inch. Stainless steel is slightly heavier at 0.289-0.290 lb/cu in.
What is the weight of a 1 inch steel plate per sq ft?
A 1" thick A36 steel plate weighs 40.8 lbs per square foot. That's 0.2836 lb/cu in x 144 cu in = 40.8 lbs.
Is stainless steel heavier than carbon steel?
Stainless steel is about 2% heavier — 0.289 vs 0.284 lb/cu in. The difference is due to chromium and nickel content.