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Room Dimensions Calculator
Turn an area into real room dimensions.
From area and ratio, length = sqrt(area × ratio) and width = area / length. A 20 m² room with ratio 1.25 gives 5 m × 4 m.
How it works
From area and ratio, length = sqrt(area × ratio) and width = area / length. A 20 m² room with ratio 1.25 gives 5 m × 4 m.
Worked example
20 m² with a 1.25 ratio → length 5 m, width 4 m.
Recommendations
- Typical living rooms sit between 1.2 and 1.5 ratio
- Bedrooms favor ratios close to 1.2
- Consider the placement of doors and windows
Tips & advice
- Use a ratio that matches standard furniture sizes
- Leave circulation paths of at least 0.9 m
- Sketch the room with the real window positions
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Use the calculatorInvoice Generator FAQs
Yes, all 20 home calculators are 100% free, private and run entirely in your browser. No account needed.
They use standard industry formulas. Always round up for materials and confirm with a professional for structural work.
The calculators use metric units (meters, liters, m³). Convert imperial measurements beforehand if needed.
No. Calculations happen instantly in your browser and nothing is sent to any server.
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