you need
• - Calculator;
• - ruler or tape measure.
Guide
1
Select brand solution that is suitable for the kind of work that you are going to perform.Depending on the nature of the work may be required solution (sand and cement, concrete, shlakotsementny etc.) Of varying strength (grade).In particular:

- for floor screeds used solution marks M200 - M300;
- masonry walls made of bricks or blocks - M50 - M100;
- for the manufacture of breeze blocks - M35 - M50;
- to manufacture concrete block - M50 - M100;
- for plastering the walls of the house - M50 - M1
00;
- for foundations - concrete solution M 200 - M 300.
2
Identify the brand of cement, which is required to provide the required grade solution.For sand-cement mortars mark should be approximately two to three times higher than the brand design solution.If you need a solution brand M200, you have to buy the cement brand M400 or M500.For the casting of cellular concrete blocks (cinder, expanded clay and so forth.) Brand cement brand solution must exceed 6-8 times.So for cellular concrete grade M50 you need cement M300 or M400.
3
Calculate the required volume of the solution.For floor screed, plaster wall, foundation or other similar Monolithic concrete required volume is calculated by multiplying the corresponding parameters (thickness, length, width) of each other.The required amount of solution to the brickwork is taken equal to 0.2 - 0.25 m³ 1 m³ of masonry, for walling blocks of standard size - 0.05 m³ solution of 1 m³ of masonry.
4
Look for recipes on the Internet for solution the desired mark by using a certain brand of cement (step 2).The most widely used is a cement M400.With its solutions can be prepared using the wide application.In particular, for the preparation of 1 m³:

- keramsit M75 will need 250 kg of cement M400;
- cinder M50 - 200 kg;
- M300 concrete for the foundation - 380 kg;
- sand-cement plaster or masonry mortar M100 - 340 kg.
5
Based on the required volume of the solution (step 3) and the amount of cement needed for the preparation of 1 m³ solution (step 4), calculate the amount of cement that you will need.For example, if you need to add a garage of brick, the walls of which the volume is 10 cubic meters, the amount of cement required is calculated as follows:

10 * 0.25 * 340 = 850 kg,

where:
- 10 - the volume of masonry in m³;
- 0,25 - solution consumption per 1 m³ of masonry in m³;
- 340 - the amount of cement required for preparation of the 1 st m³ solution in kg.