How much concrete do you use for a post?

The amount of concrete needed for a post depends on the size of the post and the depth of the hole. For a standard 4x4 inch wooden post set in a hole about 2 feet deep, typically 1 to 2 bags of concrete (each bag being 40-80 pounds) may be sufficient. Always ensure to check local building codes for specific requirements and adjust the quantity based on soil conditions and post height.