Home & Furniture calculator
What Curtain Length Do I Need?
Calculate curtain length using pole/track height above floor, desired floor clearance, and heading/hook allowance.
Enter your measurements
Use this recommended-size calculation when you need to answer “what curtain length do i need?” Enter pole/track height above floor, desired floor clearance, and heading/hook allowance and the tool returns curtain length using the rule defined for this exact use case.
- Pole/track height above floor — Required
- Desired floor clearance — Required
- Heading/hook allowance — Optional
Curtain length
Enter the measurements above to calculate curtain length.
How the calculation works
Calculation used: finishedDrop=mountHeight-finishClearance+headingAllowance. The reported result is curtain length.
Worked example
Example: Pole/track height above floor = 100 cm; Desired floor clearance = 5 cm; Heading/hook allowance = 5 cm. Result: Finished Drop = 100 cm.
Before you decide
Enter the dimensions that will exist in real use, not an approximate catalogue category. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what curtain length do i need, the limiting result on this page is curtain length.
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 Curtain Length calculator tell me?
It returns curtain length from the measurements entered on this page. The calculation is specific to curtain length, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for curtain length?
Measure pole/track height above floor, desired floor clearance, heading/hook allowance. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the curtain length?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned curtain length while allowing for the clearances, tolerances or ratings shown by its manufacturer.