Door Frame Timber Calculator
Enter the door size, the rebate and section, and your ₹/rft rate — and get the running feet of chowkhat section, timber volume in CFT, holdfast count and the all-in cost with 18% GST. A standard 900 × 2100 frame works out to about 17-18 rft. Indicative India 2026 — confirm on site.
Your frame
One rebate; common internal door. Door 900 × 2100 mm, section 3.00 × 4.00 in. Running feet = 2 jambs + head (no sill). Timber rate quoted per running foot of section; holdfasts 3 per jamb. Indicative India 2026 — varies by timber grade, city and carpenter.
Running feet of section (per frame)
0.0 rft
1.49 CFT timber · 6 holdfasts · ₹8,914/frame incl GST
Section
17.90 rft
Timber
1.49 CFT
volume
Holdfasts
6
3 / jamb
Per frame
₹8,914
incl GST
Frames
1
quantity
Total
₹8,914
incl GST
- Material₹6,265
- Fixing₹390
- Labour₹900
- GST₹1,360
Per-frame split: material vs fixing vs labour, plus 18% GST. Indicative — confirm with your carpenter.
Spec the right chowkhat for every opening
DesignAI matches timber species, section size and rebate to each door's use, your climate and termite risk — and sense-checks the quantity and rate.
How this is worked out
Running feet of section = 2 jambs (door height + a section-depth allowance for the head joint) + the head (door width + both jamb sections). A standard 900 × 2100 single-rebate frame comes to roughly 17-18 rft with no sill. Timber volume in CFT = running feet × the section cross-section area, scaled up for a double rebate or deeper section.
Holdfasts are taken at 3 per jamb (6 per frame), embedded in cement concrete — timber frames are fixed with holdfasts or screws-and-plugs; steel frames are grouted with 1:3 mortar instead. Always set the frame plumb, level and square — that is non-negotiable — and provide DPC / anti-termite treatment at the frame base, which matters in India. Costs include material (section × rate), fixing (holdfasts), labour and 18% GST.
Figures are indicative for India 2026 — confirm with your carpenter or fitter on site and measure twice. This is a guidance tool, not a substitute for a skilled carpenter or site engineer.
Related Guides — Deep-dive reading
Wooden Door Frames in India: Species, Cost & Care (India 2026)
How to choose, season and treat a timber chowkhat that survives India's termites, monsoon and heat — and what it costs per running foot.
Home Doors & EntrancesDoor Fitting Guide: Step-by-Step Installation (India 2026)
The complete step-by-step door fitting guide for India — set the frame plumb, fix it with holdfasts, grout, hang the leaf on three hinges, fit the lock, trim and seal — with the tools and checks a homeowner needs.
Home Doors & EntrancesDoor Frame Cost in India 2026: Chowkat ₹/Running Foot by Material, Quantity Calc & Installed Total
A focused 2026 cost guide for the door frame (chowkat / chaukhat) — ₹ per running foot for sal, teak, hardwood, rubberwood, WPC, steel (IS 4351), RCC and granite frames, how to calculate frame quantity from the opening perimeter, readymade vs site-made, fitting labour and a worked 3'×7' example.
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