Cubic Meters to Kg Converter
Convert cubic meters (m³) to kilograms using the density of the material. This volume-to-mass converter is essential for construction, shipping, and material estimation. The formula is mass = volume × density.
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How to Convert m³ to Kg
For example, 2 cubic meters of concrete: 2 m³ × 2400 kg/m³ = 4,800 kg (4.8 metric tons). The density varies significantly between materials — sand is about 1,600 kg/m³ while steel is 7,850 kg/m³.
m³ to Kg Reference Table
| Material | Density (kg/m³) | 1 m³ = | 1 m³ (tons) |
|---|---|---|---|
| Water | 1000 | 1,000 kg | 1.000 t |
| Concrete | 2400 | 2,400 kg | 2.400 t |
| Sand (dry) | 1600 | 1,600 kg | 1.600 t |
| Sand (wet) | 1920 | 1,920 kg | 1.920 t |
| Gravel | 1800 | 1,800 kg | 1.800 t |
| Soil (dry) | 1300 | 1,300 kg | 1.300 t |
| Soil (wet) | 1700 | 1,700 kg | 1.700 t |
| Topsoil | 1100 | 1,100 kg | 1.100 t |
| Clay | 1750 | 1,750 kg | 1.750 t |
| Asphalt | 2350 | 2,350 kg | 2.350 t |
| Limestone | 2600 | 2,600 kg | 2.600 t |
| Granite | 2700 | 2,700 kg | 2.700 t |
| Steel | 7850 | 7,850 kg | 7.850 t |
| Aluminum | 2700 | 2,700 kg | 2.700 t |
| Wood (oak) | 750 | 750 kg | 0.750 t |
| Wood (pine) | 510 | 510 kg | 0.510 t |
| Brick | 1920 | 1,920 kg | 1.920 t |
| Air (sea level) | 1.225 | 1.225 kg | 0.001 t |
Frequently Asked Questions
How many kg is 1 cubic meter of water?
1 cubic meter of water weighs 1,000 kg (1 metric ton) at 4°C.
How many kg is 1 cubic meter of concrete?
1 cubic meter of concrete weighs approximately 2,400 kg (2.4 metric tons). This varies based on the mix — lightweight concrete can be 1,800 kg/m³ while heavy concrete reaches 2,500 kg/m³.
How many kg is 1 cubic meter of sand?
1 cubic meter of dry sand weighs about 1,600 kg. Wet sand is heavier at approximately 1,920 kg per cubic meter due to water filling the gaps between grains.
How do I convert m³ to tons?
First convert m³ to kg using density, then divide by 1000. Formula: tons = m³ × density (kg/m³) ÷ 1000.
How much does 1 cubic meter of gravel weigh?
1 cubic meter of gravel weighs approximately 1,800 kg (1.8 tonnes). The exact weight depends on the gravel size and whether it is dry or wet — wet gravel can weigh up to 2,000 kg/m³.
Why does the same volume of different materials weigh differently?
Because materials have different densities. Density measures how tightly packed the atoms or molecules are. Steel (7,850 kg/m³) has atoms packed much more tightly than pine wood (350–590 kg/m³), so the same volume of steel weighs over 15 times more than pine.
Cubic Meters to Kilograms: Construction and Industrial Materials
This reference table shows the weight of 1 cubic meter for common construction, landscaping, and industrial materials. Densities are industry-standard values used for estimation and load planning.
| Material | Density (kg/m³) | 1 m³ = | Common Use |
|---|---|---|---|
| Water | 1,000 | 1,000 kg | Baseline, plumbing |
| Concrete | 2,400 | 2,400 kg | Construction |
| Gravel | 1,800 | 1,800 kg | Landscaping, roads |
| Sand (dry) | 1,600 | 1,600 kg | Construction |
| Sand (wet) | 2,000 | 2,000 kg | Excavation |
| Soil (topsoil) | 1,200 | 1,200 kg | Landscaping |
| Clay | 1,900 | 1,900 kg | Earthworks |
| Steel | 7,850 | 7,850 kg | Structural |
| Aluminum | 2,700 | 2,700 kg | Aerospace, cans |
| Wood (oak) | 600–900 | ~750 kg | Furniture, flooring |
| Wood (pine) | 350–590 | ~470 kg | Framing, decking |
| Asphalt | 2,300 | 2,300 kg | Road surfacing |
| Crushed stone | 1,500 | 1,500 kg | Base courses |
| Brick | 1,800 | 1,800 kg | Masonry |
Worked Examples: m³ to Kg Calculations
Example 1: How much does a concrete slab weigh?
A concrete slab measures 5 m × 4 m × 0.15 m.
Volume = 5 × 4 × 0.15 = 3 m³
Mass = 3 m³ × 2,400 kg/m³ = 7,200 kg (7.2 tonnes)
Example 2: What does a dump truck load of gravel weigh?
A dump truck carries 6 m³ of gravel.
Mass = 6 m³ × 1,800 kg/m³ = 10,800 kg (10.8 tonnes)
Example 3: How heavy is a topsoil delivery?
You order 2.5 m³ of topsoil for a garden bed.
Mass = 2.5 m³ × 1,200 kg/m³ = 3,000 kg (3 tonnes)
Why m³ to Kg Matters in Construction
Converting between volume and weight is critical for safety, logistics, and cost estimation on construction sites:
- Truck load limits: A typical dump truck carries 15–20 tonnes. Knowing the density of your material tells you whether 10 m³ of soil (13,000 kg) fits within the limit — or if you need two trips.
- Crane capacity calculations: Cranes are rated by weight, not volume. A 2 m³ concrete pour bucket weighs 4,800 kg — the crane operator needs this number, not the volume.
- Foundation design: Soil bearing capacity is measured in kg/m². Engineers convert the total weight of the structure (derived from material volumes and densities) to ensure the foundation can support the load.
- Material ordering: Some suppliers price by volume (m³) and others by weight (per tonne). Converting between the two lets you compare quotes accurately and avoid overpaying.
Converting Between Volume and Weight for Deliveries
Most landscape suppliers sell by the cubic yard (US) or cubic meter (metric countries). But trucks have weight limits, not volume limits. This means the actual capacity depends on what you are hauling:
- 6 m³ of wet sand = 12,000 kg — exceeding most single-axle dump truck limits (typically 10–13 tonnes payload).
- 6 m³ of topsoil = 7,200 kg — well within the same truck's capacity.
- 6 m³ of gravel = 10,800 kg — borderline, may require a tandem-axle truck.
Always convert volume to weight before scheduling deliveries. Overloading trucks causes road damage, safety hazards, and fines. Ask your supplier for the material density if you are unsure — or use the calculator above to check.