Concrete Beam Calculator

Calculate concrete volume and rebar for grade beams and structural beams. Get cubic yards, bags, and reinforcement.

πŸ—οΈ 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

πŸ’‘ How to Calculate Concrete Beam Volume

Concrete beam volume = length Γ— width Γ— depth. Grade beams are horizontal beams that connect foundation piers and distribute loads. Typical residential grade beams are 12 inches wide Γ— 18–24 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 3,000–4,000 PSI concrete for structural beams.

Two grade beams, 20 ft Γ— 12 in Γ— 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.

Concrete Beam Calculator FAQ

πŸ”— Related Calculators

Concrete CalculatorCalculate how much concrete you need for slabs, footings, and columns. Get results in cubic feet, cubic yards, and ready-mix bags (60 lb & 80 lb).Concrete Block CalculatorCalculate how many concrete blocks (CMU) you need for a wall. Enter wall dimensions and block size to get total blocks with 5% waste, mortar bags, grout fill, and cost estimate. Supports standard and custom sizes.Concrete Slab CalculatorCalculate concrete volume for flat slabs β€” patios, garage floors, driveways. Enter dimensions and thickness for cubic yards, bags, and cost.Square Footage CalculatorCalculate the square footage of any space β€” rectangle, triangle, circle, trapezoid, or rectangular border. Convert to sq m, sq yd, and acres. Estimate project cost with price per sq ft.