Door Bar Calculator
Count door bars for each doorway and floor transition.
Quick answer
Count doorways and transitions — each needs one door bar or threshold strip.
Try the calculator
Add each doorway or floor change with opening width and floor types — we recommend the bar profile, not just a count.
Results
- Door bar pieces to order
- 3
- Openings
- 3
- Total opening width
- 4 m
- Spare bar suggested
- 1
- Dual-height / Z-bar
- 1 bar(s) · 1 opening(s)
- Hard floor threshold
- 1 bar(s) · 1 opening(s)
- Flat cover strip
- 1 bar(s) · 1 opening(s)
Per opening
Opening 1 (carpet → lvt)
0.838m — Dual-height / Z-bar
1 bar — cut to 0.84m (max stock 8ft (2.44m))
Carpet to LVT, laminate, vinyl, or tile
Opening 2 (lvt → external)
2.4m — Hard floor threshold
1 bar — cut to 2.40m (max stock 8ft (2.44m))
External door with hard flooring
Opening 3 (lvt → laminate)
0.762m — Flat cover strip
1 bar — cut to 0.76m (max stock 8ft (2.44m))
Same-height hard floors — trim only
- • Standard door bar stock is sold up to 8ft (2.44m) (8ft). Wider openings need multiple bars and a joining plate.
- • Order bar length to match opening width — standard internal doors are 0.762–0.838m; patio openings often 1.6–2.0m.
- • Add one spare bar of your most common profile on whole-house jobs.
- • 1 wide opening(s) — confirm profile spans full width or use joining plates.
Definition
A door bar calculator totals transition strips between rooms or at external doors.
Explanation
Door bars cover expansion gaps and protect edges. Match profile to floor heights (carpet to LVT, etc.).
Worked example
A ground-floor flat with 6 internal doors and a front door needs 7 door bars if every room is re-floored.
Summary
Count every doorway on the plan and add one spare for mistakes.
In depth
Choosing the right transition profile
Height differences between rooms
Carpet to LVT transitions need a profile that covers both pile height and hard floor thickness. Measure finished floor heights on each side before ordering bars.
External doors may need a threshold bar with weather seal — separate from internal trims.
Count every opening
Walk the job with the customer plan and tick every doorway, patio door, and floor-type change. One missing bar on handover day looks unprofessional.
- 1List all doorways
- 2Note floor types each side
- 3Match profile to height delta
- 4Add one spare bar to order
Frequently asked questions
- Which door bar for carpet to LVT?
- Use a dual-height transition or flat cover strip rated for both surfaces.
Related resources
Automatic internal links for calculators, guides, glossary, and directory pages.
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