Spirit level buying guide

Spirit level for indoor work

Go for a rectangular spirit level with at least two vials and a minimum length of 40 cm. This type of level is lightweight and easy to read which allows you to work quickly and with accuracy. Its body may be made of plastic or metal, such as aluminium.

Spirit levels for outdoor work

Choose a level with a trapezoidal shape, two or three vials and a minimum length of 40 cm, such as a torpedo level. The body of this type of level should be metal as this will prove more durable. Select the right length of level based on the work you are doing. For example, if you are laying a brick path or pouring concrete you will need a much longer level than if you are simply hanging a shelf.

The good news is that all types of spirit levels measure using the same basic principle. The flat-based body contains a vial filled with liquid. Within this liquid is a bubble of air which moves between two lines to indicate whether your surface is level (horizontal) or plumb (vertical). Most models include one vial for horizontal levelling and one for verticals; some even include a third vial for levelling 45° angles. Laser levels are used to level surfaces from a distance with accuracy.

If you are trying to decide between a few similar spirit levels, pick the most sensitive model; the best spirit levels are accurate to half a mm per metre. If you’re working in a confined or cramped space, consider a more compact model for measuring. Spirit levels measuring only a few centimetres in length can be just as accurate as larger models. Some levels are magnetic which are practical for both indoor and outdoor projects.

For more advice on picking your tools, check out the following guides:

• Laser level buying guide

• Drill buying guide

• Circular saw blade buying guide

• Circular saw buying guide

• Grinder buying guide