The amount of builders mix you need for 1 cubic meter (1m³) of concrete depends on the desired concrete mix ratio and the specific density of the builders mix you’re using. Generally, you’ll need to mix 1,600 to 1,700 kilograms (1m3) of builder mix as well as 8 x 40kg bags (or 16 x 20kg bags) of cement and 150 litres of water to produce 1m3 of concrete.

Builders mix is a blend of sands and aggregates, used to mix with cement and water to form a concrete. It is typically used for various applications including: block fills, fence posts, foundations & footings, patio, slab and paths.

Builders Mix is also commonly known as Pre-Mix. This grade is a 12mm size aggregate mix with sand. It is used extensively in the building and construction industry with the addition of cement and water to make concrete. This product it also used by commercial builders.

Typically, the weight of builder mix is about 1.6 tonnes per cubic meter or 1,600 kg/ m3. It is available in a small bag of 25kg and 20kg and large bag known as bulk bag, or jumbo bag which weighs about 800 kilograms and yields volume about 0.5m3. There are approximately 40 small bags of ballast in a bulk bag. This assumes that a small bag contains 20kg and a bulk bag includes 800kg.

As a general guideline, the typical mix ratio for concrete is 1 part cement to 5 parts builders mix by volume. So, to make 1m³ of concrete, you would need 8 x 40kg bags (or 16 x 20kg bags) of cement as well as 1m3 (1,600 to 1,700 kilograms, or 2 bulk bags) of builders mix and 150 liters of water.

As a rule of thumb 8 bags of 20kg cement are required per 800kg bulk bag of builders mix for a 5:1 ratio in your concrete. This equates to be approximately 500 litres or 1/2 m3 (cubic metre) of concrete. Therefore, to make a half or 1/2 m3 of concrete you will need 4 x 40kg bags (or 8 x 20kg bags) of cement as well as 0.5m3 (800 to 850 kilograms, or 1 bulk bag) of builders mix and 80 liters of water.

The ratio of builders mix to cement depends on the specific application and the strength required for the concrete mix. However, a common ratio for a basic concrete mix is 1 part cement to 5 parts builders mix (a mixture of sand and gravel).

**How many bags of cement per cubic metre of builders mix**

The typical mix ratio for concrete is 1 part cement to 5 parts builders mix by volume. So, you need to mix 8 x 40kg bags (or 16 x 20kg bags) of cement per cubic metre (1m3) of builders mix to produce 1m3 of concrete.

How much does a cubic meter of builders mix weigh? A typical cubic meter of builders mix weighs approximately 1.6 tonnes or 1,600kg. However, the weight of a cubic meter of builders mix can vary depending on its composition, the specific materials included in the mix, such as sand, gravel, and other aggregates.

**Conclusions:**

With standard practices, for 1m³ of concrete, you would need 1m3 (1.6 to 1.7 tonnes, or 2 bulk bags of 800kg each) of builders mix as well as 8 x 40kg bags (or 16 x 20kg bags) of cement and 150 liters of water.