Loona Construction Calculators
Loona Construction Calculators is a free collection of 12 calculators for building, renovation and DIY: paint, tile, concrete, flooring, drywall (plasterboard), brick, gravel, roof pitch, stairs, board foot, wallpaper and mulch. Every calculator shows its formula and a worked example, so you can check the maths yourself.
Most construction calculators are imperial-only. Ours are built metric-first and imperial-complete: flip the unit switch and inputs, standard sizes (1200 × 2400 mm sheets or 4 × 8 ft, European or US wallpaper rolls, 25 kg or 80 lb bags) and results all change system. That is deliberate — Loona builds for Europe and the whole world, not one market.
This site is one of the free Loona tool sites built by Loona Automation, founded by Aurang Zeb Loona, a school teacher and AI teacher trainer from Jaranwala, Pakistan. Loona's mission — “Bolti Duniya” — is free, genuinely useful tools that solve real problems, with no sign-up and no data leaving your device.
Results are careful estimates using the standard formulas on each page, with a waste allowance for real-world conditions. They do not replace local building codes, structural engineering or professional advice.