DeckCalc helps you estimate deck boards, joists, fasteners, waste, and known material costs for a project. Advanced options can also support additional planning details, project estimates, and exportable summaries. 

The calculator is designed for homeowners, contractors, estimators, and anyone who needs a clear starting point before requesting quotes or finalizing a material order. Prices are editable so you can use your own local supplier information instead of relying on one national price.  

DeckCalc provides estimates, not structural design or building-code approval. Confirm quantities, spans, footings, connections, and local requirements with qualified professionals before purchasing materials or building. 

The software works directly in the browser and does not require installation or registration. 

What gets calculated 

• Surface area and board rows
• Board quantity plus waste
• Interior and rim joist totals
• Fasteners and box quantities
• Known costs from your prices

* DeckCalc download link provides freeware version of the software.

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