Calculate how many tiles you need, including a waste allowance.
Calculate an appliance running cost, or a whole bill including the standing charge.
Work out how many rolls of wallpaper a room needs, with doors and pattern repeat.
Volume, weight, bags and cost of gravel, mulch, soil or sand for an area and depth.
Estimate roof area, shingles, panels or tiles, underlayment and ridge length.
Estimate posts, panels, boards, joists and screws for a fence or deck.
Find the air-conditioner size a room needs in BTU/h, kW and tons.
Donaldson R F