Start with a measured plan
Choose one unit and scale, draw actual openings and full frames, and calibrate printable pieces.
Measured room layouts
Find the fit problem your room plan needs to answer
Start with the real room and full furniture. Then choose a calculation for an uncertain gap, an angled frame, two chairs or a bed that changes shape.
A scale drawing is a starting point. These guides answer different geometry and use questions; none is a surveyed home, product installation approval or universal clearance standard.
Check a folding bed and desk in three states
Compare stored, open and changeover footprints before relying on a parked-state picture.
Will Furniture Fit a Tight Gap? Calculate With Measurement Ranges
Calculate the smallest and largest possible gap from the actual measurement bounds. A small nominal gap can still hide an overlap; a positive range answers only the specific geometric check you have defined.
Does Angling Furniture Save Space? Calculate the Rotated Footprint
Calculate both room-axis dimensions before angling a rectangular desk or bed. A small turn can increase both extents; the worked example shows which angles fit one empty test region and which checks remain.
Two Desks in One Room: Check Both Chairs and the Shared Passage
Check both desks and both chair-use zones in the same active state. The worked examples distinguish parked-space appearances, a remaining passage span and actual rectangle overlaps in a staggered layout.
Choose the question that changes your decision
- Dimensions are incomplete: obtain the actual frame and reference edges before deciding a fit.
- A small gap looks possible: compare bounds and your real criterion, not only nominal values.
- A diagonal looks spacious: calculate both projected dimensions and then place the full outline.
- Two people need the same middle space: draw both active zones at once, then trace the actual route.
- Furniture opens or converts: keep stored, in-use and changeover states separate.
Keep the remaining checks attached to the plan
The arithmetic can reject a stated conflict. Passing one check leaves actual openings, users, height-dependent parts, product instructions and building arrangements to verify. Use the relevant room guide for the practical task; name a feng shui convention as a cultural preference rather than a measurement.