Concrete & Construction Calc

The Swiss Army knife of the jobsite: the app tradespeople and serious DIYers have been waiting for. 76 trade calculations across 10 modules, client Quote mode with PDF, Project mode for your jobsites. All in one app, 100% offline, in 6 languages.

Designed in France for masons, roofers, tilers, electricians, plumbers, plasterers and skilled DIYers who are tired of loose paper sheets and calculations scribbled on the back of a cement bag.

GET IT RIGHT, FIRST TIME

Enter your dimensions, get the exact result in seconds. All formulas are based on French professional standards (DTU, NF, NF C 15-100). No more headaches with roof trigonometry, soil bulking factors or cable voltage drop. Blok does it for you.

YOUR JOBSITES, FINALLY ORGANIZED

Project mode gathers every calculation of a jobsite in one place: roof takeoff, concrete mix, paint surface, cable length. Find any figure in two taps, compare two options in three.

SEND YOUR QUOTE WITHOUT LEAVING THE JOBSITE

Turn your calculations into a real professional client quote:

• Header with your logo, company name, registration number and VAT ID.

• Sequential numbering compliant with legal requirements (FR/DE/ES/IT/PT/UK).

• Lines with unit price excl. VAT, total excl. VAT, VAT, total incl. VAT, notes and terms.

• PDF export to send by email, WhatsApp...

THE 10 TRADE MODULES

MASONRY: Concrete mix, cement bags, slab, blocks, mortar, screed, strip footing, formed wall, stairs.

PLASTERING: Plasterboard, screws, joint tape, rails and studs, thermal resistance R, multilayer wall U-value.

TILING: Tiles per m², adhesive, grout, skirting, floating parquet, PVC flooring, diagonal layout.

PAINT: Wall surface (with openings), ceiling, quantity, primer, wood varnish.

ROOFING: Pitch, rafter length, 2 or 4-slope surface, tiles, battens, framing, gutters and downpipes.

ELECTRICAL: Ohm's law, single and three-phase power, cable section, voltage drop, number of sockets per NF C 15-100.

PLUMBING: Water heater volume, pipe diameter, PVC drain slope, radiator power, boiler, pressure losses.

EARTHWORKS: Excavation volume, bulking factor, material tonnage, number of skips, drainage slope.

GEOMETRY: Areas, volumes, Pythagoras and 3-4-5 squaring, trigonometry, rule of three.

CONVERSIONS: Length, area, volume, mass, temperature, pressure, energy.

OFFLINE AND PRIVATE BY DESIGN

Everything works without a connection: Blok runs in the basement just as well as in the open countryside. Your calculations, projects and quotes never leave your device. No account to create, no cloud, no third-party trackers. Available in French, English, Spanish, German, Italian and Portuguese.