🧪 Concrete Estimator - Tube
Estimate concrete volume and cost for tube/column installations
Inside diameter of Sonotube
How to Use This Calculator
Enter Tube Dimensions
Input the inside diameter of the Sonotube in inches and the height of the tube in inches. Measure the inside diameter for accurate volume calculations.
Specify Number of Tubes
Enter the number of tubes you need to pour. For multiple identical tubes, enter the number to get total concrete volume and cost for all tubes.
Calculate and Review
Click "Estimate Concrete" to see total concrete volume in cubic yards, number of bags needed, estimated cost, and concrete weight. Add 5-10% extra for waste.
Order Materials
Order ready-mix concrete by cubic yards or bagged concrete by bag count. Remember to order Sonotubes (forms) and rebar separately for tube/column installation.
Formula
Tube Volume = π × (Diameter/2)² × Height
Radius (ft) = Diameter (inches) ÷ 2 ÷ 12
Volume (cu yd) = Volume (cu ft) ÷ 27
Bags (80 lb) = Volume (cu yd) ÷ 0.015
Estimated Cost = Volume (cu yd) × $150 (average price per cubic yard)
Example 1: Standard Tube (12" diameter, 96" height, 1 tube)
Step 1: Convert to feet: Diameter = 12" = 1 ft, Radius = 0.5 ft, Height = 96" = 8 ft
Step 2: Calculate volume: π × 0.5² × 8 = 6.28 cu ft
Step 3: Convert to cubic yards: 6.28 ÷ 27 = 0.233 cu yd
Step 4: Calculate bags (80 lb): 0.233 ÷ 0.015 = 16 bags
Step 5: Estimated cost: 0.233 × $150 = $35
Example 2: Multiple Tubes (18" diameter, 120" height, 4 tubes)
Step 1: Convert to feet: Radius = 0.75 ft, Height = 10 ft
Step 2: Calculate single volume: π × 0.75² × 10 = 17.67 cu ft
Step 3: Total volume: 17.67 × 4 = 70.68 cu ft
Step 4: Convert to cubic yards: 70.68 ÷ 27 = 2.62 cu yd
Step 5: Estimated cost: 2.62 × $150 = $393
About Concrete Estimator - Tube
The Concrete Estimator - Tube is an essential tool for contractors, builders, and DIY enthusiasts who need to accurately estimate the volume and cost of concrete needed for Sonotube or column installations. This calculator eliminates guesswork by providing precise volume calculations and cost estimates based on tube diameter, height, and number of tubes, helping you budget accurately and order the right amount of concrete.
When to Use This Calculator
- Post Foundation: Estimate concrete volume and cost for post foundation columns
- Column Installation: Calculate concrete needed for structural column installations
- Sonotube Projects: Estimate concrete for Sonotube/column form installations
- Budget Planning: Calculate material costs and estimate total project costs
- Contractor Estimates: Quick reference for contractors bidding tube/column projects
Why Use Our Calculator?
- ✅ Accurate Volume Calculation: Precise calculations prevent over-ordering or running short
- ✅ Cost Estimation: Provides estimated costs based on average concrete prices
- ✅ Multiple Tubes: Calculates total volume and cost for multiple identical tubes
- ✅ Bag Calculations: Shows number of bags needed for both 60 lb and 80 lb bags
- ✅ Weight Calculation: Calculates concrete weight for transportation planning
- ✅ Time Savings: Instant calculations eliminate manual math and measurements
Common Applications
Post Foundation: Contractors and homeowners installing post foundations use this calculator to estimate concrete volume and cost. Standard post columns use 12 to 18 inch Sonotubes, which this calculator helps estimate accurately.
Column Installation: Builders installing structural columns use this tool to estimate concrete quantities and costs. Accurate estimates help budget projects and order materials.
Budget Planning: Homeowners and contractors use this calculator to estimate costs for tube/column projects, helping plan budgets and compare options.
Tips for Best Results
- Measure Accurately: Measure inside diameter of Sonotube for accurate calculations
- Add Waste: Always add 5-10% extra for waste, spills, and mistakes
- Cost Variations: Concrete costs vary by location ($120-180/cu yd) - use estimates as a guide
- Order Materials: Order Sonotubes, rebar, and other materials separately
- Ready-Mix vs. Bags: For large volumes, ready-mix is more economical; for small volumes, bags may be more convenient
- Check Prices: Get quotes from local suppliers for accurate pricing
Frequently Asked Questions
How much concrete do I need for a Sonotube?
Concrete needed depends on tube diameter and height. For example, a 12-inch diameter, 8-foot tall Sonotube needs approximately 0.233 cubic yards of concrete (about 16 bags of 80 lb concrete). Use the calculator with your specific dimensions for accurate estimates.
What is a Sonotube?
A Sonotube is a cardboard form used to create round concrete columns or posts. It's a cylindrical tube that holds concrete while it cures, then can be removed or left in place. Standard sizes are 8, 10, 12, 14, 16, 18, 20, and 24 inches in diameter.
How much does concrete cost per cubic yard?
Concrete costs vary by location and type, typically $120-180 per cubic yard for ready-mix concrete. The calculator uses $150 per cubic yard as an average estimate. Get quotes from local suppliers for accurate pricing in your area.
Should I use ready-mix or bagged concrete?
For large volumes (over 1 cubic yard), ready-mix concrete is typically more economical and convenient. For small volumes (under 1 cubic yard), bagged concrete may be more convenient. Consider delivery, mixing, and handling requirements when deciding.
Do I need rebar in Sonotubes?
Yes! Most Sonotube installations require vertical rebar reinforcement for strength. Standard is 4 pieces of #4 or #5 rebar placed vertically in the column. Consult building codes or an engineer for specific requirements based on load.
How accurate is the cost estimate?
The cost estimate uses $150 per cubic yard as an average. Actual costs vary significantly by location ($120-180/cu yd), concrete type, delivery fees, and current market prices. Use the estimate as a guide and get quotes from local suppliers for accurate pricing.