With this concrete calculator, you can calculate concrete how much concrete you need for a foundation, column, concrete floor or concrete slab

**How much concrete do I need?**

With the help of this concrete calculator you can calculate how much concrete you need for pouring a foundation, column, concrete floor, or concrete slab.

The concrete calculator displays the result in liters and cubic meters of concrete.

You can also calculate with the concrete calculator how many bags of ready-mixed concrete mortar **you need for 1m³ of fresh concrete**.

**Calculate how many bags of ready-mixed concrete mortar you need**

Per poured cubic meter **(1x1x1 meter = 1m³)** you need about 80 bags of concrete mortar.

This concrete calculator displays the result in liters and cubic meters of concrete.

You can also calculate with the concrete calculator how many bags of ready-to-use concrete you need per m3.

This **concrete calculation** tool helps you to easily calculate how much concrete you need and also to determine whether you choose fresh concrete mortar or bags of ready-made concrete mortar from a quality brand, such as Weber Bamix.

**Concrete calculating concrete floor**

The formula for calculating the amount of concrete for a concrete floor or concrete slab is length x width x height **(thickness of the concrete floor to be poured)** in centimeters or meters = the amount of concrete required in cubic meters **(m3 or cubic meter)**.

**l shape living room**

Do you have an L-shaped living room? Divide the floor into adjacent rectangles.

Add the areas of the rectangles together.

The height is again the thickness of the concrete floor to be poured.

**What is a sandwich floor?**

A sandwich floor consists of beams with filling elements in between.

When placing a sandwich floor, the space between the prefab prestressed concrete beams is usually filled with polystyrene blocks or ‘**rolls**‘. Sometimes steel beams are also used.

A pressure layer of 4 cm and a screed with a thickness of approximately 5 cm are poured over it with fresh concrete.

**Calculate concrete sandwich floor**

How much concrete do you need for a sandwich floor with narrow rolls (515 mm)?

Pour 55 liters of fresh concrete mortar per m2 for a pressure layer of approx. 4 cm concrete above the polystyrene rolls **(and approx. 3 cm above the beams, the beam is 1 cm higher)**.

How much concrete do you need for a sandwich floor with wide rolls (635 mm)?

Pour 65 liters of fresh concrete mortar per m2 for a pressure layer of approx. 4 cm concrete above the polystyrene rolls (and approx. 3 cm above the beams, the beam is 1 cm higher).

On top of this, a screed of sand cement or concrete is applied with a thickness of about 5 cm, depending on underfloor heating or other piping.

Use the concrete calculator to calculate the amount of concrete for the screed of your sandwich floor.

**Deposit both layers at once?**

How much concrete do you need to pour a sandwich floor with narrow rolls at once (**pressure layer and screed)**?

Pour 85 liters of fresh concrete mortar per m2 **(for a total layer thickness of approx. 7 cm)**

How much concrete do you need to pour a sandwich floor with wide rolls at once **(pressure layer and screed)**?

Pour 95 liters of fresh concrete mortar per m2 **(for a total layer thickness of approx. 7 cm)**

**How much concrete do I need for a foundation?**

To calculate the amount of concrete for a foundation, first determine the volume of the foundation trenches.

**Calculate volume foundation**

Multiply the following measures: length of the outer foundation wall x depth of the outer foundation wall x-height of the foundation **(sum 1)**.

Then multiply the length, depth and height of the inner foundation wall **(sum 2)**.

The difference between the two outcomes **(sum 1 and sum 2)** is the volume of the foundation trenches.

**Example:**

outer foundation wall length = l (a) = 1.69 m

inner foundation wall length = l (b) = 1.09 m

outer foundation wall depth = d (a) = 1.69 m

inner foundation wall depth = d (b) = 1.09 m

height of the foundation = h = 0.60 m

(l (a) xd (a) xh) – (l (b) xd (b) xh) = volume of foundation trenches = amount of concrete

(1.69 x 1.69 x 0.60) – (1.09 x 1, 09 x 0.60) = 2.86 m³ – 1.19 m³ = 1.67 m³

**Related Article: How To Learn About CONCRETE MORTAR**