🧱
Concrete & Masonry
Concrete and masonry calculators for volume, rebar spacing, CMU blocks, footings, and mix ratios
Instant Answers
Pre-calculated results for common scenarios
concrete volume
20×20 Garage Slab (4 inches)12×12 Patio Slab (4 inches)20×24 Driveway Slab (5 inches)4×20 Sidewalk (4 inches)10×12 Shed Slab (4 inches)24×24 Garage Slab (4 inches)50×30 Basketball Court Slab (4 inches)16×20 Patio Slab (4 inches)10×10 Small Patio Slab (4 inches)30×40 Workshop Slab (6 inches)2×2 Deck Footing (12 inches deep)18×18 Fence Post Footing (24 inches deep)50-Foot Foundation Wall Footing (2×8 inches)3×3 Column Footing (12 inches deep)8-Inch Sonotube (4 feet tall)10-Inch Sonotube (4 feet tall)12-Inch Sonotube (4 feet tall)12-Inch Sonotube (3 feet tall)20-Foot Retaining Wall (4 feet tall, 8 inches thick)100-Foot Basement Wall (8 feet tall, 8 inches thick)10-Foot Garden Wall (3 feet tall, 6 inches thick)Front Porch Steps (3 feet wide, 4 steps)Garage Entry Steps (3 feet wide, 2 steps)Deck Steps (4 feet wide, 3 steps)Patio Steps (5 feet wide, 2 steps)
📦
Concrete Volume Calculator
Calculate concrete volume in cubic yards for slabs, footings, columns, and other shapes
ACI 318 Building CodeConcrete Volume Calculation Standards
📏
Rebar Spacing Calculator
Calculate rebar placement and spacing requirements per ACI 318 structural standards
ACI 318-19 Section 25.2CRSI Manual of Standard Practice
🧱
CMU Block Calculator
Calculate number of concrete masonry units needed and estimate mortar requirements
NCMA TEK ManualTMS 402/602 Building Code Requirements
⚖️
Footing Sizing Calculator
Determine footing dimensions based on soil bearing capacity and structural loads
ACI 318-19 Chapter 13IBC 2021 Section 1809
🥤
Concrete Mix Ratio Calculator
Calculate concrete mix proportions for desired strength and workability per ACI standards
ACI 211.1 Standard PracticeASTM C94 Ready-Mixed Concrete