Concrete
Concrete Column Calculator
Calculate concrete volume for rectangular or circular columns. Get cubic yards, cubic feet, cubic meters, weight, and suggested order.
Inputs
Leave 0 to skip cost estimate.
Live estimate
Concrete required
1.28 cu yd
- Geometric volume
- 1.19 cu yd
- Cubic feet (total)
- 32 cu ft
- Cubic meters
- 0.906 m³
- Volume per column
- 8 cu ft
- Suggested order
- 1.5 cu yd
- Approx. weight
- 5,184 lb
- Approx. weight (tons)
- 2.59 tons
- Estimated total
- $248
Column dimensions from plans typically refer to finished concrete — confirm before ordering if form dimensions differ.
You will likely need
- •1.28 cu yd — concrete required
- •Approximate delivered weight: 5,184 lb
- •Estimated total: $248
Estimator guidance
Calculated quantity
1.19 cu yd
Suggested order
1.5 cu yd
Material behavior adjustment
+27%
Reason: Column pours are unforgiving — running short mid-pour is costly. A modest buffer plus rounding to the next supplier increment keeps every column full. Ordered up to the nearest 0.5 CY to match a practical ready-mix increment.
Estimator guidance based on how this material behaves in the field. The calculated quantity above remains mathematically correct — this is what an experienced estimator would order.
- Tall columns require internal vibration to prevent honeycomb voids — plan for the extra crew time, not extra volume.
- Forms bulge slightly under fluid concrete pressure; expect a fraction of a percent over-pour vs pure geometry.
- Ready-mix suppliers deliver in fixed increments (typically 0.25 or 0.5 CY) — always order to the next practical increment.
These are estimator recommendations, not a change to the underlying formula. The calculated quantity above remains mathematically correct.
- Verify structural dimensions from stamped plans — never scale from a drawing.
- Brace forms against wind and pour pressure before placement.
- For multiple columns, add a small buffer for the last pour — accumulating over-pour on early columns leaves you short at the end.
- Small placements (a single column, a couple of piers) are often more economical as bags or site-mixed concrete than a short-load truck.
- Ordering the geometric volume and coming up short on the last column.
- Using form dimensions instead of finished concrete dimensions.
- Skipping tube/form bracing on tall pours.
- Ignoring short-load fees on very small ready-mix orders.
How the concrete column formula works
Rectangular columns: V = width × depth × height per column, then multiplied by the number of columns. Convert inches to feet for the cross-section, and read cubic feet directly.
Round columns: V = π × r² × height, where r = diameter ÷ 24 (converts inches to feet and halves it).
Divide cubic feet by 27 to convert to cubic yards, apply waste, and round up to a practical supplier increment.
Need this material?
Compare local supplier quotes.
Coming soon — Yardexa will connect your estimate with vetted local suppliers.
Yardexa AI Estimator
Turn this estimate into a full project bid.
Labor, materials, waste, and margin — generated in seconds. Join the early access list.
Material assumptions
- Rectangular column volume = width × depth × height × count.
- Round column volume = π × r² × height × count.
- Concrete density ≈ 2.0 short tons per cubic yard (~4,050 lb/cy).
- Ready-mix is usually the right call above ~1 cubic yard; smaller pours can go bags or site-mix.
Frequently asked questions
Related calculators
Column dimensions and reinforcement are structural — verify with your engineer or plans. Confirm ready-mix supplier minimums and ordering increments before pouring.