Concrete Cylinder Calculator
Calculate concrete volume for cylindrical forms, columns, posts, and testing specimens
1Cylinder Dimensions
Recommended: 5-10% for spillage and variations
2Concrete Volume Results
Enter cylinder dimensions to see volume calculations
How to Use the Concrete Cylinder Calculator
Step-by-Step Instructions
- 1Select your measurement units (feet, inches, meters, or centimeters)
- 2Enter the cylinder diameter and height dimensions
- 3Specify the number of cylinders you need to pour
- 4Set waste percentage (5-10% recommended for spillage)
- 5Optionally include rebar volume deduction for accurate calculations
- 6Review volume results and material requirements
Calculator Formula
Volume = π × d² × h ÷ 4
Where:
- • π = 3.14159
- • d = diameter
- • h = height
Accuracy Tips
- Measure cylinder dimensions at multiple points for accuracy
- Include 5-10% waste factor for spillage and variations
- Account for rebar volume in reinforced cylinders
- Consider form thickness for accurate internal dimensions
Concrete Mix Information
High Strength Mix
1:1.5:3 (Cement:Sand:Gravel)
- • Compressive Strength: ~2900 PSI
- • Ideal for: Structural columns, load-bearing posts
- • Testing: Suitable for strength specimens
Standard Mix
1:2:4 (Cement:Sand:Gravel)
- • Compressive Strength: ~2000 PSI
- • Ideal for: General construction, fence posts
- • Cost: More economical option
Ready-Mix
80 lb or 60 lb bags
- • Convenience: Just add water
- • Quality: Consistent mix proportions
- • Coverage: 0.6 ft³ (80 lb) / 0.45 ft³ (60 lb)
Common Applications and Examples
Structural Applications
Building Columns
Typical sizes: 12"-24" diameter, 8'-12' height
Reinforcement: #4-#8 rebar, 4-8 bars
Fence Posts
Typical sizes: 4"-8" diameter, 6'-8' height
Installation: 2'-3' below ground level
Pier Foundations
Typical sizes: 8"-16" diameter, varies by load
Depth: Below frost line, per local codes
Testing Applications
Compressive Strength Testing
Standard: 4" diameter × 8" height
Alternative: 6" diameter × 12" height
Quality Control Specimens
Testing at: 7, 14, 28 days
Minimum: 3 specimens per test age
Research Testing
Various sizes for specific studies
Custom: As per research requirements
⚠️ Safety and Best Practices
Safety Considerations
- Always wear appropriate PPE when working with concrete
- Ensure proper form support for tall cylinders
- Follow local building codes for structural applications
- Have structural calculations reviewed by a professional engineer
Quality Best Practices
- Properly cure concrete for minimum 28 days for full strength
- Use proper vibration to eliminate air voids
- Maintain consistent water-cement ratio for strength
- Document mix designs and test results for verification
Professional Consultation Required: For structural applications, load-bearing columns, and critical construction projects, always consult with a licensed structural engineer. This calculator provides estimates for planning purposes and should not replace professional engineering analysis.