Job Calculators

Fast, accurate, glove-friendly. Free for all tradespeople.

Concrete

Groundwork

Volume + bag count for slabs, footings, posts

Brick & Block

Bricklaying

Wall area → bricks/blocks + mortar

Stud Wall

Carpentry

Timber + plasterboard + insulation

Decking / Roofing

Carpentry / Roofing

Boards, joists & felt by area

Paint Coverage

Decorating

Litres needed for a room (multi-coat)

Tile Calculator

Tiling

m² + tile count + adhesive + grout

Gravel / Topsoil

Landscaping

Volume + tonnage (UK bulk-bag yield)

Stair Calculator

Carpentry

Rise, run, riser count + stringer length

Cable Voltage Drop

Electrical

BS 7671 voltage drop check + Vd %

Conduit Fill

Electrical

IET on-site guide factor method

MCB Sizing

Electrical

Load → MCB rating + cable size

Pipe Size & Flow

Plumbing

Velocity check (≤1.5 m/s domestic)

Radiator Sizing

Plumbing

Watts/BTU heat output for a room

Drainage Fall

Plumbing / Groundwork

Gradient 1:N → fall over length

Steel & Metal Weight

Fabrication

kg/m and total weight for plate, bar, box, tube, angle, beams

Welding Heat Input

Fabrication

kJ/mm from amps, volts and travel speed — MMA, MIG, TIG, SAW

Weld Consumables & Gas

Fabrication

Estimate wire, rods, gas, arc time and cost from the joint size and length

Welding Symbol

Fabrication

Build or read a BS EN ISO 2553 weld symbol in plain English

Tap the star on any calculator to pin it to the top of this page.

Essential cookies keep you signed in. Analytics and marketing cookies run only if you say yes. Privacy policy