Threshold & Transition Calculator — Strips & Profiles
Determine strip type by height difference, length per doorway, and choose reducer, T-bar or ramp profile.
Each doorway needs a transition strip
Between the two floor surfaces
Or let calculator recommend
Match your door width
How We Calculate This
This calculator recommends the correct threshold profile based on the height difference between floors and calculates quantities for all doorways.
Profile selection guide
- 0mm difference: T-bar (flat join)
- 1–12mm difference: Reducer strip
- 12mm+ difference: Ramp / end profile
- Step edges: Stair nosing
Frequently Asked Questions
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Last updated: March 2026
All calculations are estimates. Verify with your supplier.