Room calculators

The sums that come up when you are planning a room: how big it is, how much flooring and paint it needs, and what the measurements are in the other unit system. Each one works from a width and a length, and every result is an estimate to plan with rather than a quantity to order blind.

• Square footage calculator

  Room area in square feet and square metres, from width and length.

• Flooring calculator

  How many boxes of flooring to order, waste allowance included.

• Paint calculator

  Litres of paint for a room, with doors and windows deducted.

• Feet to metres converter

  Convert room dimensions between feet, metres and millimetres.

If you would rather work from a drawing than from two numbers, draw the room in the planner and it will work out the area and perimeter from the walls themselves — useful for rooms that are not a simple rectangle.