University of Vermont Extension
Landowners and foresters may want to estimate how much carbon their forests store and sequester. The free tools below can help inform management decisions and evaluate forest carbon benefits.

Landowners and foresters may want to know how much carbon their forest is storing and sequestering – whether they plan to explore forest carbon markets or they simply want to know as part of their management decision making.  The following no-cost tools provide some options for determining forest carbon storage and sequestration.  Please read the disclaimer below before exploring the tools.

Disclaimer:

There are many credible and publicly available models, tools, and calculators for estimating forest carbon in trees or the other forest carbon pools. However, they vary considerably in their ease of use, necessary data inputs, assumptions, and accuracy. For example, some tools will provide an estimate of stored carbon in a parcel of forest that is simply the regional average, while others require detailed field inventory data that can be used to provide a parcel-specific estimate. For field inventory data, different tools require difference amounts of data: some use only tree species and diameter to estimate tree carbon, while others use additional fields like height, decay class, and defects. Those methods that require more detailed field measurements will typically provide more accurate carbon estimates, but the data can be expensive and time-consuming to collect. Before you collect data, it is important to first consider why you want to calculate forest carbon and how you will use the estimates. Then compare your needs to the list of carbon tools and models. When you generate a forest carbon estimate, no matter what tool or calculator you use, there is likely a different method available that will yield a different forest carbon estimate. It is therefore important to know how forest carbon estimates are produced in order to compare forest carbon estimates from one property to another.

person measuring a tree

Forest Carbon and Durable Wood Products

Calculate Carbon from basal area or wood products

Online Forest Carbon Calculation Tools

MyTree

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MyTree

Analysis of this tool:  Uses national averages to calculate tree carbon estimates. Focused on individual trees.

Difficulty of use:  Easy

Accuracy:  Low

Resilient Land Mapping Tool

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Resilient Land Mapping Tool

Analysis of this tool:  This tool created by The Nature Conservancy allows users to explore site-specific estimates of stored forest carbon and average annual rates of carbon sequestration in all forest carbon pools for the years 2010 and 2050.  Users can upload a shapefile of a property forest parcel or draw a polygon of the property on the map.

Difficulty of use:  Medium

Accuracy:  Medium

Conservation Carbon Map

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Conservation Carbon Map

Analysis of this tool:  This tool created by The Trust for Public Land allows users to explore site-specific estimates of stored forest carbon and average annual rates of carbon sequestration on wide geographies and individual properties 100 acres or larger. Data is from LANDSAT imagery and LIDAR with ground truthing.

Difficulty of use:  Medium

Accuracy:  Medium to High

Forest Vegetation Simulator

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Forest Vegetation Simulator

Analysis of this tool:  This tool, created by the USDA Forest Service, requires inputs of site-specific forest inventory data collected on-the-ground.  The suite of programs allows for estimation of tree volumes, carbon and the ability to “grow” the forest in the computer model to estimate future volume and carbon.  This is a powerful set of models from which to generate estimates of carbon.  Requires considerable background knowledge and skill to use.

Difficulty of use:  Difficult

Accuracy: High

DataMART

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DataMART

Analysis of this tool:  This tool is from the USDA Forest Service and provides Forest Inventory and Analysis inventory data tables in many formats for specific states and geographies. These are pre-generated data that includes forest carbon and other forest related inventory data and information.

Difficulty of use:  Difficult

Accuracy: High
 

Evalidator

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Evalidator

Analysis of this tool:  This tool is also from the USDA Forest Service FIA and allows for self-generation of forest inventory data output, including forest carbon, for a county or larger area.  Options within allow for querying FIA data in areas other than counties or states if coordinates of the polygon are provided.

Difficulty of use:  Difficult

Accuracy: High

Manual calculation forest carbon calculation methods

Forest Carbon Accounting and Modeling Framework Alternatives, 2022

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Forest Carbon Accounting and Modeling Framework Alternatives

This report summarizes information to help states build their ability to measure, track, and model forest carbon for planning climate‑focused forest management. It provides:

  1. An overview of forest carbon models—how they work, how different types compare, and their strengths and limitations across different scales and uses.
  2. A decision guide to help states choose the most appropriate model based on their needs and available resources, whether using in‑house staff or outside support.

Standard Estimates of Forest Ecosystem Carbon for Forest Types of the United States, 2021

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Standard Estimates of Forest Ecosystem Carbon for Forest Types of the United States

Difficulty of use: Easy

Accuracy: High accuracy for a regional scale; low accuracy for stand-level estimates

Methods and Equations for Estimating Aboveground Volume, Biomass, and Carbon for Trees in the U.S. Forest Inventory, 2010

Comprehensive Database of Diameter-based Biomass Regressions for North American Tree Species, 2004