Deck Calculator

Our deck calculator helps you estimate the materials needed to build a deck, including decking boards, joists, and posts. Whether you're building a simple rectangular deck or planning a larger outdoor living space, this tool provides material quantities to help you plan and budget your project.

Accurate material estimation is essential for deck building because lumber is expensive and running short mid-project causes delays. The calculator accounts for standard joist spacing and includes estimates for support posts based on typical deck construction practices.

This tool is perfect for DIY homeowners planning their first deck project, contractors preparing estimates, and anyone asking "how much decking do I need?" or "how many joists for a 12x20 deck?" Remember to always check local building codes for specific requirements in your area.