EMC Chart of North America

Image from NWFA. Reproduced with permission.

This EMC chart of North America shows the average moisture content (MC) ranges for wood used indoors in each region. Use it as a starting point for the MC you can expect for interior wood in your area.

As the note on the map explains, these numbers are examples of how average moisture content for interior wood products varies from one region to another and from one season to another within a region. Actual moisture content conditions in any location may differ significantly from these numbers.

To estimate the equilibrium moisture content (EMC) for a specific temperature and relative humidity, use our EMC calculator. Then check the wood itself with an accurate moisture meter.

Learn all about what EMC is and the formula in our guide.

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Wagner Meters

Wagner Meters is a family-owned American business that aims to provide solutions in moisture measurement technology that will enhance the quality and value of each customer’s project. With an almost 60-year legacy of innovation, Wagner continues to be a resource for both individual craftsmen and high-performance commercial endeavors.

Last updated on October 30th, 2026