The coverage calculator is a tool for assessing the number of injections of illicit drugs in a community for which there is a clean needle and syringe available.

The coverage calculator was developed by Exchange Supplies a social enterprise with the world's largest range of tools for harm reduction including a comprehensive range of needles and syringes, all available to buy online.

To view the coverage calculator, click here to visit the Harm Reduction Works Campaign website which contains a large number of resources to reduce drug related harm and death.