Calculators

Quantities, sizes and weights for home projects and welding. Free, no sign-up, and every formula is tested.

Home & DIY

Paint calculator
Open
Litres or gallons for a room, and which can sizes to buy.
Concrete calculator
Open
Slabs, patios and post holes, with premix bag counts.
Flooring calculator
Coming soon
Laminate, vinyl and hardwood packs, with waste.
Fence calculator
Coming soon
Posts, rails, panels and concrete for a run of fence.
Tile calculator
Coming soon
Tiles and boxes including waste.

Metal weight calculator
Open
Weight of plate, bar, tube and angle in steel, stainless, aluminium and more.
Welder generator size
Coming soon
What size generator your welder needs.
Shielding gas usage
Coming soon
How long a cylinder lasts and what it costs per hour.
Heat input calculator
Coming soon
kJ/mm from volts, amps and travel speed.