Calculation of built-up space

Hello,

Can someone help me how to calculate the converted space?
I have a quote and now want to know how many m3 my floor plan has.

Key data house.
9.875 * 10.75 m floor area.
2 full floors
No basement
Concrete slab 0.25 m
Ground floor height 2.60 m
Ceiling upper floor 0.20 m
Upper floor height 2.72 m
Ceiling attic 0.18 m
Gable roof 30 degrees

Key data adjacent garage:
6.23 * 8.33 m floor area
Garage height 2.74 m

Does the attic have to be included? I've heard something about a factor of 0.5.

It would be great if someone knew how it works

You calculate the volume, nothing is halved.

But with the information given, no one can calculate the volume, as the floor slab and ceiling including the floor structure hardly have these measurements. Or are the room dimensions rough?

Can someone help me understand how to calculate the built-up volume? Does the attic have to be counted? I've heard something about a factor of 0.5.

You're in the wrong place: the half-calculation concerns the area specifications in the floor plan, between 2 and 1 m height.

Instead of "built-up volume," people now talk about "gross volume." This GVI exists in classes a = enclosed / b = covered / c = open.

The calculation methods and weighting factors vary depending on the standard. For building permits, the actual floor height applies (room height plus ceiling thickness / roof thickness), but real estate financiers also use fixed factors (e.g., fictitious floor height 2.80 m for full floors, and different factors for attics depending on whether they are developed or not).

How "one" calculates it therefore also depends on who wants to hear the result. Without specifying the standard / calculation method used, the result figures cannot be interpreted.

Different calculation and weighting methods apply for the related question of the building mass number.

Unfortunately, linking is not allowed here, but you can find explanations under GVI and on elkage.de, and calculation sheets from several real estate agents / financiers.

All raw measurements

then those are already correct; if from finished plastered measurements, 2% should be deducted.

So the ground floor is supposed to have a finished room height of about 2.45m?

Under the condition that the short side is the gable, the following calculation should fit:

BRI (total) = (9.875 * 10.75) * (0.25 + 2.60 + 0.20 + 2.72 + 0.18) + (9.875 * 10.75) * 2.85 / 2 + 6.23 * 8.33 * 2.74

Whether and to what extent this helps you... your choice.