Live Demo — Concrete Volume & Cost Calculator
Enter your foundation shape, depth and concrete unit price to get the volume, purchase quantity and cost estimate instantly.
Concrete Volume & Cost Calculator
Free professional concrete volume and cost calculator for solar street light foundations. Input the square or circular foundation dimensions, buried depth, above-ground height, loss factor and C30 concrete unit price to compute the concrete volume in ft³ and yd³, the purchase quantity including pouring loss, and the estimated cost.
Key Features
Foundation Type
Choose a square (length × width) or circular (diameter) foundation cross-section with dimensions from 0.3 ft upward.
Depth Parameters
Set the buried depth h, the above-ground pedestal height h_top and the pouring loss factor to model the full concrete block.
Cost Parameters
Enter the C30 concrete unit price in $/yd³ (including delivery and pumping fees) to drive the cost estimate.
Volume Calculation
Computes V = L × W × (h + h_top) for square blocks and V = π/4 × D² × (h + h_top) for circular blocks.
Purchase Quantity
Applies the loss factor (V_purchase = V × 1.05) and converts the result to cubic yards for ordering ready-mix concrete.
Cost & Reference
Estimates cost as yd³ × unit price and shows a reference table of common foundation sizes for 19.7-39.4 ft poles.
Technical Specifications
| Platform | HTML5 Web App | Android (via WebView) |
| Core Calculation | V = L × W × (h + h_top); V_purchase = V × 1.05; Cost = V(yd³) × price |
| Foundation Shape | Square (L × W) / Circular (D), ≥ 0.3 ft |
| Buried Depth | ≥ 0.3 ft (default 3.3 ft) |
| Above-Ground Height | 0 - 20 ft (typical 0.7 ft) |
| Loss Factor | 0 - 20% (default 5%) |
| Concrete Grade | C25 / C30 (2400 kg/m³ ≈ 150 lb/ft³) |
| Unit Price | $ / yd³ (1 yd³ = 27 ft³) |
| Industry Standards | EN 206, ACI 211.1 |
| Output | Concrete volume (ft³ & yd³), purchase quantity, cost estimate |
Frequently Asked Questions
What does the loss factor cover?
The loss factor (typically 5%, applied as V × 1.05) covers pouring losses, formwork leakage and leftover mix when ordering ready-mix concrete. It converts the theoretical geometry volume into the quantity you actually need to purchase.
Why include the above-ground height h_top?
The anchor-bolt pedestal rises slightly above grade (typically 0.3-0.7 ft), and concrete is needed for that part too. The volume is calculated over the full height (h + h_top) times the plan area, so leaving out h_top would under-order concrete.
How is the cost estimated?
The purchase volume in cubic yards (V × 1.05 converted by 1 yd³ = 27 ft³) is multiplied by the unit price. For example, a 3.61 × 3.61 × 3.94 ft block needs about 2.16 yd³; at $47.8/yd³ that is roughly $103.
What does the cement content figure mean?
The cement content estimate uses about 23.7 lb of C30 cement per cubic foot of concrete, roughly matching a 1 : 1.42 : 3.23 : 0.47 mix ratio with 42.5 ordinary Portland cement. It helps when ordering bagged cement or confirming ready-mix proportions.
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