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Concrete Calculator

Calculate volume and weight of concrete plus amounts of cement, sand and gravel

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cm
🇩🇰 All calculations are based on Danish rules, rates, and currency (DKK). This calculator is translated for convenience but applies exclusively to Denmark.

Calculate concrete for your project

Our concrete calculator helps you determine the precise amount of concrete you need. The calculator shows volume, total weight and individual materials: cement, sand and gravel.

Concrete composition

Standard concrete consists of cement, sand, gravel and water. A typical mix is about 350 kg cement, 700 kg sand and 1,200 kg gravel per m³. This gives a density of about 2,400 kg/m³.

Thickness and application

For a terrace or driveway, at least 10 cm thickness is recommended. For foundations, 30-80 cm is typical depending on load. Always reinforce concrete with rebar or mesh for larger projects.

Frequently Asked Questions

How much does 1 m³ of concrete weigh?

1 m³ of standard concrete weighs about 2,400 kg (2.4 tonnes). Lightweight concrete weighs 600-1,800 kg/m³ depending on type. Heavy concrete with special aggregates can weigh up to 4,000 kg/m³.

What is the correct concrete mix?

A standard concrete mix is 1 part cement, 2 parts sand and 3 parts gravel (1:2:3). For foundations, 1:2:4 is often used to save cement. For floor casting, 1:2:3 with finer aggregates is used. Keep the water content as low as possible for strength.

Should I order ready-mixed concrete?

For over 1 m³, ready-mixed concrete from a concrete plant is often the best choice – it's cheaper, faster and gives consistent quality. Under 1 m³, you can mix yourself with casting mix. A concrete truck typically delivers 6-8 m³ at a time.

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