Footing Concrete Calculator
Reviewed by Engr. Talha Tariq | PEC License #: PEC-CIVIL-37815 | Last updated: 2025-10-24
Quickly estimate concrete volume for rectangular, square, or circular footings. Enter your dimensions, choose units, and add waste or dry-volume factors. Results show in m³ and yd³ (ft³ available).
Estimate concrete volume for rectangular/square or circular footings. Includes a waste allowance.
Keep all inputs in the same unit. Rectangular: L × W × D. Circular: π × r² × D.
Enter values above and press Calculate to reveal results.
How the Calculator Works
Rectangular / Square: Convert inputs to meters, compute L × W × D. Waste applied: V × (1 + waste%).
Circular: Convert diameter and depth to meters, compute π × r² × D with r = diameter / 2. Then add waste.
Toggle display units between m³, ft³, and yd³.
Key Features of Our Free Footing Concrete Calculator
Compute volume with L × W × D for isolated or strip footings—unit conversions handled internally.
Use diameter and depth to calculate π × r² × D for round pads and pier bases.
Enter dimensions in meters, centimeters, feet, or inches; we convert to a common base for accuracy.
Add any waste percentage (commonly 5–10%) to cover over-excavation and placement losses.
Show results in m³, yd³, or ft³ without re-entering values.
Results appear after you click Calculate—keeps the form focused and prevents accidental reads.
Export a tidy summary and view yd³ with +5% and +10% helpers for supplier rounding.
Why Choose Our Footing Concrete Calculator?
- Supports both rectangular/square and circular footings in one place.
- Accurate unit handling across m, cm, ft, and in—no manual conversions needed.
- Waste % included to reduce the risk of under-ordering due to over-excavation.
- Switch display units instantly for engineering checks or ready-mix ordering.
- Printable results streamline site approvals and purchase orders.
How to Use the Footing Concrete Calculator
- Select the Rectangular / Square or Circular tab.
- Choose your input unit (m, cm, ft, or in) and enter dimensions.
- Add a Waste Allowance (%)—5–10% is typical for footings.
- Click Calculate to reveal Net Volume, With Waste, and Waste Added.
- Set Show in to view m³, yd³, or ft³, and use the yd³ helper (+5% / +10%) for ordering.
- Use Print / Save Calculations to export a clean summary.
Formulas Used in the Calculator
- Volume = Length × Width × Depth (Thickness)
Inputs are converted to meters internally before multiplication to keep units consistent.
- Volume = π × r² × Depth, where r = Diameter ÷ 2
- Adjusted Volume = Raw Volume × (1 + Waste%)
Typical waste for footings is 5–10% depending on excavation, formwork, and placement method.
- 1 m³ = 35.3147 ft³
- 1 m³ = 1.30795 yd³
- yd³ = ft³ ÷ 27
Frequently Asked Questions
Can I calculate both rectangular and circular footings?
Yes. Use the tabs to switch between Rectangular/Square and Circular modes; each uses the appropriate geometric formula.
Which input units are supported?
Meters (m), centimeters (cm), feet (ft), and inches (in). You can display results in m³, yd³, or ft³.
How much waste should I add for footings?
5–10% is common to account for over-excavation, trench irregularities, and placement losses. Follow your project specifications.
Why is there a ‘Show in’ selector?
It lets you view the same computed volume in cubic meters, cubic yards, or cubic feet, which helps when coordinating with suppliers.
What does the yards helper do?
It provides yd³ with +5% and +10% additions to quickly round orders for ready-mix deliveries.
Does this include rebar, cover, or mix design?
No. The calculator focuses on volume. Reinforcement and mix grade must follow your structural drawings and local codes.
Can I print or save the calculation?
Yes. Use the Print / Save button to export a clean, A4-friendly summary of your inputs and results.
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