Tool
Floor-height calculator
Compare the layers coming out with the layers going in, then check a measured door gap.
- Owners
- Renovators
Question 1 of 3
Your floor-height estimate
This is a measurement estimate. Have your installer check clearances, transitions and any door requirements on site.
How this tool works
Height change = the total new installed layers minus the total removed layers. Remaining door gap = your current gap minus that height change.
All measurements are in millimetres. The calculation assumes a common subfloor reference and uses the thicknesses you enter; it does not assess installation suitability.
Questions, answered
Do I include attached underlay?
Include it once. If the quoted board thickness already includes the attached pad, do not add that pad again as separate underlay.
Does a positive door gap mean it is suitable?
No. Door movement, seals, tolerances and any fire-door requirements still need to be checked. The result is arithmetic, not an installation approval.
What if the subfloor needs levelling?
Use the installed preparation thickness advised by your installer. Where thickness varies, calculate the relevant points separately and check the tightest clearance.