Concrete Beam Calculator
Calculate concrete volume and rebar for grade beams and structural beams. Get cubic yards, bags, and reinforcement.
๐๏ธ Concrete Beam Calculator
Results
Volume per Beam30.00 cu ft
Total Volume60.00 cu ft
Cubic Yards2.22 cu yd
80 lb Bags100 bags
Rebar (4 bars)160 lin ft
๐ก How to Calculate Concrete Beam Volume
Concrete beam volume = length ร width ร depth. Grade beams are horizontal beams that connect foundation piers and distribute loads. Typical residential grade beams are 12 inches wide ร 18โ24 inches deep. Structural beams above grade may be larger depending on span and load.
All concrete beams require reinforcement. Minimum: 4 longitudinal bars (typically #5 or #6) with #3 stirrups spaced every 12 inches (closer near supports). Grade beams spanning between piers need bottom bars for tension. Use 3,000โ4,000 PSI concrete for structural beams.
Two grade beams, 20 ft ร 12 in ร 18 in: volume each = 22.5 cu ft. Total = 45 cu ft = 1.67 cu yd. Rebar: 160 lin ft of longitudinal bars. About 75 bags of 80 lb mix.