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Calculator Tools
Door & Window Calculators

Blind Size Calculator

Blind width and drop for inside or outside recess fitting, with the overlap allowances.

Enter values

Results update as you type.

Result

Order size

1,190 × 1,395 mm

Blind width
1,190 mm
Blind drop
1,395 mm
Fabric area
1.66 m²
Bracket positions
60 mm in from each end
Fitting note
Measure the recess in three places and use the smallest

About the Blind Size Calculator

Blind width and drop for inside or outside recess fitting, with the overlap allowances.

Also known as: roller blind size, blind measurement calculator, recess blind size, window blind dimensions.

How to use this calculator

  1. Enter recess width, recess height, fitting, blind type and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

inside fit = recess − clearance · outside fit = recess + overlap

Worked example

Using the values pre-filled in the calculator above:

  • Recess width = 1,200 mm
  • Recess height = 1,400 mm
  • Fitting: Inside the recess
  • Clearance each side = 5 mm
  • Blind type: Roller

the calculator returns:

  • Order size: 1,190 × 1,395 mm
  • Blind width: 1,190 mm
  • Blind drop: 1,395 mm
  • Fabric area: 1.66 m²