The number of bags of concrete you need for 1m3 depends on the mix ratio, the specific brand of concrete mix, and the size of the bags. Typically, a bag of concrete mix contains 20, 25, 30, 40, 50 kilograms of concrete. Typically, a 20 kg bag of concrete mix is used for a 0.009 cubic meter batch. Therefore, for 1 cubic meter, you would need approximately 110 x 20 kg bags.
To determine the number of bags you need, you’ll need to calculate the volume of concrete you want to pour and then divide that by the volume of one bag. Here’s the formula: Number of bags = (Volume of concrete in cubic meters) / (Volume per bag in cubic meters).
Concrete is a blended mix of Portland cement, sand, aggregate, water with approve ingredient. The ready mix concrete can be used for building or repairing foundation walls, fence post, sidewalks, curbs, steps and ramps and for setting posts and others concrete structure like, footing, slab, beam and columns.
The weight of 1 cubic meter (1m³) of premix bag of concrete can vary depending on the specific mix design, which includes the amount of aggregate, water, and air in the mix. On average, it could be 2,200 kilograms.
Australian Builder’s a premix bag of concrete weighs 20kg, so, you need 110 x 20 kg bags of concrete for 1m3, while a Quikrete bag of concrete weighs about 25kg, so, you’d need 88 x 25 kg bags for 1m3.
One 20kg bag of concrete yields volume about 0.009m3 which will cover an area of 0.9 m2 to a depth of approximately 10mm. Or 110 x 20kg bags equates to one cubic meter of mixed concrete.
One 25kg bag of concrete yields volume about 0.0114m3 which will cover an area of 1.14 m2 to a depth of approximately 10mm. Or 88 x 25kg bags equates to one cubic meter of mixed concrete.
One 30kg bag of concrete yields volume about 0.0136m3 which will cover an area of 1.36 m2 to a depth of approximately 10mm. Or 74 x 30kg bags equates to one cubic meter of mixed concrete,
One 40kg bag of concrete yields volume about 0.018m3 which will cover an area of 1.8 m2 to a depth of approximately 10mm. Or 55 x 40kg bags equates to one cubic meter of mixed concrete.
One 50kg bag of concrete yields volume about 0.023m3 which will cover an area of 2.3 m2 to a depth of approximately 10mm. Or 44 x 40kg bags equates to one cubic meter of mixed concrete.
How many bags of concrete for 1m3
A typical 20kg bag of concrete mix is around 0.009 cubic meters. For 1 cubic meter (1m³) of concrete, you would need approximately 110 x 20 kg bags of concrete mix. This guidance slightly depending on brands and their coverage. You should use 2.3 to 2.4 liters of water per 20kg bag.
For example, if you have a slab dimensions 2 meters long, 2 meters wide and 50mm deep. Calculate volume of slab 2m × 2m × 0.05m = 0.2m3. So, you’d need approximately 110× 0.2 = 22 x 20 kg bags concrete.
In general, you’ll need approximately 11 x 20 kg bags of concrete for 0.1m3, 22 x 20 kg bags of concrete for 0.2m3, 33 x 20 kg bags of concrete for 0.3m3, 44 x 20 kg bags of concrete for 0.4m3, 55 x 20 kg bags of concrete for 0.5m3, 66 x 20 kg bags of concrete for 0.6m3, 88 x 20 kg bags of concrete for 0.8m3, and 220 x 20 kg bags of concrete for 2m3.
Here’s are the Table for How many bags of concrete do i need:
| SL.no. | Volume of concrete | No. of 20kg bags |
| 1 | 0.1m3 | 11 bags |
| 2 | 0.2m3 | 22 bags |
| 3 | 0.3m3 | 33 bags |
| 4 | 0.4m3 | 44 bags |
| 5 | 0.5m3 | 55 bags |
| 6 | 0.6m3 | 66 bags |
| 7 | 0.8m3 | 88 bags |
| 8 | 2m3 | 220 bags |
Conclusions:
For 1 cubic meter (1m³) of concrete, you would need approximately 110 x 20 kg bags of concrete mix. This guidance slightly depending on brands and their coverage. You should use 2.3 to 2.4 liters of water per 20kg bag.