Living Space Calculator

Living Space Calculator (WoFlV)

Fast, stylish & practical: Add rooms, split sloping ceilings, choose balcony factor – instant result with breakdown.

1) Add Area

Tip: Measure wall-to-wall. The calculator rounds internally to 2 decimal places – but you also get the raw base area.
WoFlV Logic Active (adjust via Factor)
Note: This calculator supports common principles (height zones, balcony share). For special cases (stair openings, chimneys, winter gardens, special features), always check the specific contract/plan.

2) Result & Breakdown

Living Space acc. to WoFlV (Sum)
0.00 m²
Calculable living space incl. slope factors & balcony share.
Progress shows: Living space vs. Total floor area (incl. non-calculable parts).
Total Floor Area
0.00 m²
All entered areas (incl. non-calculable zones) – helpful for understanding.
Utility Area (separate)
0.00 m²
Cellar/Garage/Storage rooms outside the apartment are collected here (not WoFlV living space).

3) Positions

Type Description Floor Area Factor Living Share Action
No entries yet. Start on the left with "+ Add".
Pro Tip: You can calculate balconies separately at 25% (typical) or choose 50% if explicitly stated in the contract/valuation.

Explanation & FAQ

This Living Space Calculator helps you quickly determine a comprehensible WoFlV living space – i.e., the living space commonly used in Germany for rental contracts, exposés, and valuations. You enter length and width for each room, provide an area directly, or use the extra mode for sloping ceilings. The highlight: For attic rooms, you can divide the area into zones based on room height (≥2.00 m, 1.00–1.99 m, <1.00 m). This replicates typical WoFlV logic, where low areas are counted only partially or not at all towards the living space. At the same time, the calculator shows you the Total Floor Area, so you can immediately see how factors and height zones affect the result.

How to use the tool best: First, choose the Category. "Living Room" counts towards WoFlV living space, "Balcony/Terrace" is calculated with a share (standard 25%), and "Utility Area" is collected separately (e.g., Cellar or Garage). Then decide on the Input Mode. "Length × Width" is perfect for rectangular rooms, "Direct m²" is suitable for values from plans, and "Split Sloping Ceiling" offers the highest accuracy if the room height varies. Each entry lands in the table, can be deleted, and the sums update immediately.

Important: This calculator is a practical support tool – not legal advice. In reality, special cases can play a role: niches, pillars, stair openings, chimneys, winter gardens, or contractual specifics. Use the result as a clean orientation and check it against floor plans, measurements, or the contract if necessary. Privacy Bonus: Everything runs locally in your browser. When clicking "Save", only a dataset is stored in your browser (LocalStorage) – nothing is transmitted to a server.

FAQ: WoFlV or DIN 277 – what is the difference?

WoFlV is often used for residential space in rental/sales contexts. DIN 277 describes areas in building valuation/planning differently (including utility, traffic, technical areas). This calculator is optimized for WoFlV logic.

FAQ: How are sloping ceilings handled correctly?

Separate the area by room height: ≥2.00 m counts fully, 1.00–1.99 m counts half, under 1.00 m does not count towards living space. That is exactly what the split mode is for.

FAQ: Balcony/Terrace – why 25% and sometimes 50%?

Often balconies/loggias are calculated at 25%. In special cases (e.g., very high quality, highly usable, contractually regulated), 50% can also occur. You can adjust the factor in the calculator.

FAQ: Do cellars, garages, or storage rooms count?

Usually not towards WoFlV living space, which is why there is "Utility Area separate". This gives you transparency: Living space remains clean, additional areas do not disappear.

FAQ: Why does my result differ from the exposé/contract?

Common reasons are rounding, different measuring points (inner/outer dimensions), unconsidered niches, stair openings, or different rules (DIN instead of WoFlV). Use the table to find deviations.

FAQ: Can I save the result as PDF?

Yes: "Print / PDF" opens the print view. There you can choose "Save as PDF" in the browser. Alternatively, copy the summary into a document.

FAQ: Save/Load – what happens exactly?

The calculator stores your inputs locally in the browser (LocalStorage). This is practical for intermediate steps – and privacy-friendly because nothing is uploaded.

Embed this Calculator on Your Website

You can integrate this calculator for free into your own website. Get the embed code on our overview page.

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