The calculators our own engineers reach for on real jobs — now free for everyone. Size an AC, budget a build, convert land units or get a drawing converted. No sign-up, works on mobile.
Enter your room size and get the exact air-conditioning capacity you need, in tons and BTU. Adjusts for sun, occupancy and heat sources.
Open tool 02Estimate the cost to build per square foot, with a material and labour breakdown. Pick a finish level or type your own local rate.
Open tool 03Convert length, area and Bangladeshi land units — sq ft, sq m, mm, inch, katha, bigha and decimal — all updating at once.
Open tool 04Convert AutoCAD drawings to clean PDFs, or a PDF back to editable DWG. Handled by real CAD engineers, files kept confidential.
Open toolClickBit Digital works on both sides of a project — the engineering design and the software behind it. These calculators are the same ones our team reaches for during real jobs: sizing air-conditioning, budgeting a build, converting units on the fly. We cleaned them up and put them online because a good tool helps everyone, and it is a fair way to introduce what we do.
Use them freely. And when a job needs more than an estimate — a real HVAC design, a quantity-accurate BOQ from a BIM model, or a drawing redrawn properly — that is the work we do. Call +880 1886-684876 or see all our services.
Load calculations, BIM-driven BOQs and construction-ready drawings — produced by engineers, not rules of thumb.