It depends on which wood dye you are using. The coverage for each wood dye is: Traditional Wood Colours - 10-12m² per litre (interior & exterior versions)Pastel Colours - 10-12m² per litre (interior & exterior versions)Shades of Grey - 8-10m² per litreDriftwood Collection - 8-10m² per litreWoodland Colours - 8-10m² per litreThis coverage is based on one liberal coat. We recommend applying the dye quite liberally with a good quality brush along the grain. However, certain colours will require a light second coat to deepen the shade.We always recommend producing a test piece first so you can ensure that you get the result that you'd like to achieve.