Practical guide
Cubic Metres to Tonnes and Wheelbarrows
Use material density and usable load capacity to turn measured volume into a practical quantity estimate.
Updated 16 October 2026
Reviewed by the 99Tools team. Editorial and corrections policy.
Density links volume and mass
Density is mass per unit volume. Multiply m³ by kg/m³ for kilograms, then divide by 1,000 for metric tonnes. A hypothetical material density of 1,600 kg/m³ gives 1.6 tonnes for one m³. This is an arithmetic example, not a universal value for soil or sand. The calculator deliberately has no material density default.
Material condition matters
Dry and wet materials, loose and compacted fill, and solid or stacked timber can have different bulk densities. Match the density to the same condition as the volume being measured or ordered. Water is often approximated at 1,000 kg/m³ for rough calculations, but temperature and other conditions affect its actual density. Exact work needs appropriate measured data.
Count wheelbarrow loads using real fill
Use litres actually carried per load rather than assuming every wheelbarrow has the same usable capacity. At a hypothetical 65 litres, one m³ needs about 15.385 fills, so 16 trips include a partly filled final trip. Material, fill level, spillage and practical handling can change the result. No handling or vehicle capacity is approved by that division.
Bins and trucks have more than a volume limit
A nominal 2 m³ or 6 m³ skip and a truck described as 22 m³ also have payload, filling and material restrictions. A calculated volume cannot prove a load is acceptable. Confirm the provider’s allowed waste, fill level and weight terms before hiring or ordering. The calculator does not locate rental equipment or determine a legal payload.
Use a matching price basis
Optional cost uses measured volume times an entered rate, plus entered charges. Confirm whether the quote describes loose delivered material, compacted work, solid timber or another basis. A water bill can include tariff bands and fixed charges, while concrete supply can include minimum loads and pumping. One flat rate is not automatically the full project or municipal bill.
Keep the assumptions with the result
Record dimensions, density condition, usable load capacity and quote details so another person can follow the estimate. If those values are not confirmed, omit the optional conversion rather than treating a guessed factor as a fact. Use concrete-specific tools for recipe or bag calculations; the cubic metre tool measures volume without designing a mix.
Use the related calculators
Apply the explanation above with your own figures. Open a calculator below, check every input and review the result assumptions before making a decision.
Frequently asked questions
How many litres are in a cubic metre?
Exactly 1,000 litres equal 1 m³. A litre is a volume unit; “cubic litre” is not the unit needed here.
How big is one cubic metre?
It is the volume of a 1 m × 1 m × 1 m cube. A different shape can have the same volume.
Can I convert square metres to cubic metres directly?
Depth is required. Multiply area in m² by depth in metres to obtain m³.
How many square feet does one cubic metre cover?
It depends on depth. At an illustrative 100 mm, one m³ covers 10 m², about 107.639 ft²; this is not a recommended layer depth.
How many wheelbarrows are in a cubic metre?
Divide 1,000 litres by the actual usable litres per load. Round up if counting trips with a partly filled final load.
How many tonnes is one cubic metre?
It depends on density and material condition. Tonnes = m³ × density in kg/m³ ÷ 1,000; the calculator does not assume a density.
How many concrete bags or cement bags make one m³?
Complete concrete premix needs its declared finished yield. Cement-only bags need a confirmed concrete recipe. Use the related tools rather than treating bag mass as volume.