Job Calculators
Fast, accurate, glove-friendly. Free for all tradespeople.
Concrete
GroundworkVolume + bag count for slabs, footings, posts
Brick & Block
BricklayingWall area → bricks/blocks + mortar
Stud Wall
CarpentryTimber + plasterboard + insulation
Decking / Roofing
Carpentry / RoofingBoards, joists & felt by area
Paint Coverage
DecoratingLitres needed for a room (multi-coat)
Tile Calculator
Tilingm² + tile count + adhesive + grout
Gravel / Topsoil
LandscapingVolume + tonnage (UK bulk-bag yield)
Stair Calculator
CarpentryRise, run, riser count + stringer length
Cable Voltage Drop
ElectricalBS 7671 voltage drop check + Vd %
Conduit Fill
ElectricalIET on-site guide factor method
MCB Sizing
ElectricalLoad → MCB rating + cable size
Pipe Size & Flow
PlumbingVelocity check (≤1.5 m/s domestic)
Radiator Sizing
PlumbingWatts/BTU heat output for a room
Drainage Fall
Plumbing / GroundworkGradient 1:N → fall over length
Steel & Metal Weight
Fabricationkg/m and total weight for plate, bar, box, tube, angle, beams
Welding Heat Input
FabricationkJ/mm from amps, volts and travel speed — MMA, MIG, TIG, SAW
Welding Symbol
FabricationBuild or read a BS EN ISO 2553 weld symbol in plain English