Furniture centred-turn clearance calculator

Calculate fits prescribed centred 90° planar turn and minimum turning square side with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use fits prescribed centred 90° planar turn and minimum turning square side to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Rigid furniture plan length (m)
1.8
Rigid furniture plan width (m)
0.6
Door clear width (m)
0.9
Corridor clear width (m)
2.2
Clear turning-zone depth (m)
2.2
Fits prescribed centred 90° planar turn (1=yes,0=no)
1
Minimum turning square side (m)
1.897367
Straight doorway width margin (m)
0.3

Try another scenario

Rigid furniture plan length (m)
1.9800000000000002
Rigid furniture plan width (m)
0.6
Door clear width (m)
0.9
Corridor clear width (m)
2.2
Clear turning-zone depth (m)
2.2
Fits prescribed centred 90° planar turn (1=yes,0=no)
1
Minimum turning square side (m)
2.068913
Straight doorway width margin (m)
0.3
Calculation method

Calculation method

Fits prescribed centred 90° planar turn (1=yes,0=no)

Prescribed centred horizontal 90° rotation needs a square at least rectangle diagonal; aligned passage needs furniture width≤door width.

Minimum turning square side (m)

Prescribed centred horizontal 90° rotation needs a square at least rectangle diagonal; aligned passage needs furniture width≤door width.

Straight doorway width margin (m)

Prescribed centred horizontal 90° rotation needs a square at least rectangle diagonal; aligned passage needs furniture width≤door width.

Symbols and units
a
Rigid furniture plan length (m)
b
Rigid furniture plan width (m)
c
Door clear width (m)
d
Corridor clear width (m)
e
Clear turning-zone depth (m)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Checks only a straight entry followed by rotation about the furniture centre in a rectangular clear zone. Does not solve all possible moving paths or tilting. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Checks only a straight entry followed by rotation about the furniture centre in a rectangular clear zone. Does not solve all possible moving paths or tilting.
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