Construction & engineering calculators
Material take-offs, structural quick-checks and site sizing — cement, bricks, steel, paint, beams, solar, water tanks and more. Built for civil engineers, contractors and home builders.
About these tools
These calculators run entirely in your browser. They use the same formulas a junior site engineer would apply with a notebook — nothing fancy, but enough to size up a quotation, double-check a contractor's claim, or plan a small build before you commit cement and steel.
What to use when
- Estimating a build? Start with cement, brick, steel and paint for the core material take-off.
- Designing a stair or beam? The staircase and beam load tools give you preliminary sizes — verify against IS 875 / IS 456 (or your local code) before construction.
- Planning utilities? Use solar panel for rooftop sizing, water tank for storage, and borewell for groundwater planning.
Common questions
Are these calculators code-compliant?
They use formulas that match Indian Standard codes (IS 456 for concrete, IS 800 for steel) and standard engineering references, but they don't cover load combinations, safety factors, or detailing. Treat the output as a preliminary check, not a final design.
Why does the cement calculator add a 1.54 factor?
Concrete shrinks when water is added — 1 cubic metre of dry mix produces only about 0.65 m³ of wet concrete. The 1.54 factor (≈ 1/0.65) lifts the dry quantities back up to give the right amount on site.
Do you save what I type?
No. All calculations happen in your browser and nothing is sent to our servers, logged, or shared.