Concrete Unit Conversion Guide
Reference tables and examples for converting concrete-related units.
Why Conversions Matter
Accurate conversions prevent ordering errors and ensure consistent calculations across unit systems.
Volume Conversions
| From | To | Factor |
|---|---|---|
| ft³ | yd³ | ÷ 27 |
| yd³ | ft³ | × 27 |
| m³ | yd³ | × 1.308 |
| yd³ | m³ | × 0.765 |
Weight Conversions
| From | To | Factor |
|---|---|---|
| lb | kg | × 0.4536 |
| kg | lb | × 2.2046 |
| ton (US) | kg | × 907.185 |
| kg | ton (US) | ÷ 907.185 |
Linear Conversions
| From | To | Factor |
|---|---|---|
| in | ft | ÷ 12 |
| ft | in | × 12 |
| ft | m | × 0.3048 |
| m | ft | × 3.2808 |
Area Conversions
| From | To | Factor |
|---|---|---|
| ft² | yd² | ÷ 9 |
| yd² | ft² | × 9 |
| m² | ft² | × 10.7639 |
| ft² | m² | × 0.0929 |
Concrete-Specific Conversions
Bag yield (80 lb)
≈ 0.022 yd³
Bag yield (60 lb)
≈ 0.017 yd³
Density (normal)
≈ 145 lb/ft³ (2320 kg/m³)
Practical Examples
Cubic feet to yards
54 ft³ ÷ 27 = 2 yd³
Meters to feet
10 m × 3.2808 = 32.808 ft
Quick Reference
Volumes
- ft³ ↔ yd³: 27
- m³ ↔ yd³: 1.308/0.765
Linear
- ft ↔ m: 0.3048/3.2808
Common Conversion Mistakes
- Confusing cubic and square units (ft³ vs ft²) — remember 3 dimensions
- Using wrong factors (US vs Imperial gallons; short vs long tons)
- Ignoring temperature effects — expansion/contraction
- Rounding too early — keep precision until the final answer
- Mixing unit systems — convert all measurements before calculating
- Ignoring local standards — conventions vary by region
Use Our Calculators
Our calculators handle these conversions automatically:
- Volume by shape
- Unit conversions
- Number of bags
- Cost estimator
Enter your measurements and let the tools compute accurately.