Hole Volume Calculator
Calculate the volume of circular and rectangular holes for excavation and concrete projects
1Hole Shape
2Circular Dimensions
3Hole Volume Results
Enter hole dimensions to calculate volume
Volume = π × radius² × depth
How to Use the Hole Volume Calculator
Step-by-Step Instructions
- 1Select the hole shape (circular or rectangular)
- 2Enter the hole depth with appropriate units
- 3Input dimensions: radius/diameter for circular, length/width for rectangular
- 4Enable concrete calculator for post hole applications
- 5Review volume results and material requirements
Calculation Formulas
Circular Hole:
Volume = π × radius² × depth
Rectangular Hole:
Volume = length × width × depth
Concrete with Waste:
Concrete = Volume × (1 + waste%) × holes
Common Applications
- Fence post holes (typically 6-8 inches diameter)
- Foundation footings and pier holes
- Utility pole installations
- Sign post and mailbox installations
Hole Types and Applications
Circular Holes
Post Holes
Fence posts, sign posts, mailboxes
Typical: 6-12 inches diameter, 2-3 feet deep
Utility Poles
Power lines, telephone poles, lighting
Typical: 18-36 inches diameter, 6-10 feet deep
Foundation Piers
Building foundations, deck supports
Typical: 8-24 inches diameter, varies by load
Rectangular Holes
Foundation Footings
Building foundations, retaining walls
Width varies by load requirements
Utility Trenches
Electrical, plumbing, cable installations
Typically 12-24 inches wide
Garden Features
Planters, water features, landscape elements
Custom dimensions for design requirements
⚠️ Safety and Best Practices
Excavation Safety
- Call 811 (Dig Safe) before excavating to locate utilities
- Use proper shoring for holes deeper than 4 feet
- Check soil stability and water table levels
- Wear appropriate PPE and use safe entry procedures
Construction Guidelines
- Follow local building codes for depth requirements
- Consider frost line depth in cold climates
- Allow proper drainage to prevent water accumulation
- Order 10-15% extra concrete for waste and spillage
Professional Consultation: Hole volume calculations are critical for structural integrity and safety. For load-bearing applications, foundation work, or deep excavations, always consult with licensed engineers and follow local building codes. This calculator provides estimates for planning purposes and should not replace professional engineering analysis.