Home & Furniture calculator
What Blind Size Do I Need?
Enter recess width at top, recess width at middle, and recess width at bottom to work out blind recess order size.
Enter your measurements
What Blind Size Do I Need? The answer depends on recess width at top, recess width at middle, and recess width at bottom. This calculator keeps those inputs separate and reports blind recess order size rather than relying on a generic size label.
- Recess width at top — Required
- Recess width at middle — Required
- Recess width at bottom — Required
- Recess height left — Required
- Recess height centre — Required
- Recess height right — Required
- Manufacturer fitting deduction — Optional
Blind recess order size
Enter the measurements above to calculate blind recess order size.
How the calculation works
V14 calculation: blindWidth=max(0,min(recessWidthTop,recessWidthMiddle,recessWidthBottom)-deduction); blindHeight=max(recessHeightLeft,recessHeightCentre,recessHeightRight). This is the implementation specification for this calculator.
Worked example
Example: Recess width at top = 120 cm; Recess width at middle = 119.5 cm; Recess width at bottom = 119 cm; Recess height left = 150 cm; Recess height centre = 150.5 cm; Recess height right = 150 cm; Manufacturer fitting deduction = 0.5 cm. Result: Blind Height = 150.5 cm; Blind Width = 118.5 cm.
Before you decide
Use the finished, usable dimensions after trim, handles, skirting, packaging or other projections where relevant. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what blind size do i need, the limiting result on this page is blind recess order size.
Direct measurement/geometry calculation. No external reference is required for the arithmetic itself; the result is derived only from the user-entered measurements and the formula stored in calculationLogicJson.
Frequently asked questions
What does the Blind Size calculator tell me?
It returns blind recess order size from the measurements entered on this page. The calculation is specific to blind size, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for blind size?
Measure recess width at top, recess width at middle, recess width at bottom, recess height left, recess height centre, recess height right, manufacturer fitting deduction. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the blind recess order size?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned blind recess order size while allowing for the clearances, tolerances or ratings shown by its manufacturer.