Construction projects routinely cross the metric-imperial divide. Material suppliers, international drawings, and project specifications can mix units freely. This guide gives you every conversion you need in one place — bookmark it for your next project.
1. Length Conversions
Length is the most common conversion in construction — heights, spans, elevations, and dimensions.
| From | To | Multiply by |
|---|---|---|
| Meters (m) | Feet (ft) | × 3.28084 |
| Feet (ft) | Meters (m) | × 0.3048 |
| Meters (m) | Inches (in) | × 39.3701 |
| Inches (in) | Millimeters (mm) | × 25.4 |
| Centimeters (cm) | Inches (in) | × 0.3937 |
| Yards (yd) | Meters (m) | × 0.9144 |
Use our Meters to Feet converter and Feet to Meters converter for instant results.
2. Area Conversions
Area conversions are critical for flooring, roofing, land measurement, and material estimation.
| From | To | Multiply by |
|---|---|---|
| m² | ft² | × 10.7639 |
| ft² | m² | × 0.092903 |
| m² | yd² | × 1.19599 |
| Acres | m² | × 4046.86 |
| Hectares (ha) | Acres | × 2.47105 |
Use our m² to ft² converter for instant area conversion.
3. Volume Conversions
Volume conversions are needed for concrete orders, excavation, water storage, and aggregate procurement.
| From | To | Multiply by |
|---|---|---|
| m³ | ft³ | × 35.3147 |
| ft³ | m³ | × 0.028317 |
| m³ | Litres (L) | × 1000 |
| m³ | US Gallons | × 264.172 |
| m³ | yd³ | × 1.30795 |
4. Weight Conversions
Weight conversions matter for steel orders, material delivery, and structural load calculations.
| From | To | Multiply by |
|---|---|---|
| Kilograms (kg) | Pounds (lbs) | × 2.20462 |
| Pounds (lbs) | Kilograms (kg) | × 0.453592 |
| Metric Ton (t) | kg | × 1000 |
| Metric Ton (t) | lbs | × 2204.62 |
| Short Ton (US) | kg | × 907.185 |
5. Pressure & Stress Conversions
Used in soil bearing capacity, concrete strength, and structural design.
- 1 MPa = 1 N/mm² = 145.038 psi
- 1 kPa = 0.145038 psi
- 1 psi = 6.89476 kPa
- 1 kN/m² = 1 kPa = 20.885 lbf/ft²
6. Temperature Conversions
Important for concrete curing, asphalt laying, and cold-weather construction planning.
°F to °C: (°F − 32) × 5/9
°C to °F: (°C × 9/5) + 32
- 0°C = 32°F (freezing — do not pour concrete)
- 5°C = 41°F (minimum for concrete work)
- 20°C = 68°F (ideal curing temperature)
- 35°C = 95°F (max for concrete — use chilled water)
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Browse All Tools →Quick Mental Conversion Tips
- Meters → feet: multiply by 3, then add 10% (rough: 3.3× for precision)
- m² → ft²: multiply by 10 then add 8% (precise: ×10.764)
- kg → lbs: double it, then add 10% (precise: ×2.205)
- km → miles: multiply by 0.6 (precise: ×0.621)
- Litres → gallons (UK): divide by 4.546
Frequently Asked Questions
The most common conversions are meters to feet and m² to ft², used daily in international construction projects and real estate comparisons.
No. The UK has largely switched to metric (SI) units but still uses imperial informally. The US primarily uses imperial units (feet, inches, pounds, gallons). Both systems appear in international projects.
Most Middle Eastern countries officially use metric (SI) units. However, US-based projects, products, and specifications may reference imperial units, requiring regular conversion.
Related tools: m² to ft² · Meters to Feet · kg to lbs · m³ to ft³