How do I determine the ideal sample size for my project?

We’ve created free tools to help project developers calculate the ideal, compliant sample size according to leading methodological recommendations.

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Calculating Your Ideal Sample Size

Graph of the Economic Optimum Number of Samples
This chart compares project economics using sample sizes from the Economic Optimum Number of Samples (EONS) versus the Minimum Detectable Difference (MDD) approach. For the purpose of this graphic, profit is the value of carbon sequestration after sampling costs and uncertainty deductions.
The ideal sample size for  project depends on a range of variables, from quantification approach to project area specifics.

That’s why we’ve developed clear approaches to sample size calculation and the accompanying sample size calculators to provide recommendations on the ideal sample size based on your project's needs.

These calculators provide an insightful starting point for any project. Our experts would be happy to help you create a tailored sample size calculation to better understand the economics of sampling design for your specific project.

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Seqana can help you calculate the ideal sample size for your project.
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The Sample Size Calculators

Measure and Remeasure

EONS Calculator

For projects using Measure and Remeasure, the Economic Optimum Number of Samples (EONS) calculator recommends the number of samples where the return on investment for project is maximized. Typically, projects will use EONS along with cash flow considerations to determine the ideal sample size.

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EONS Calculator

MDD Calculator

The MDD calculator for Measure and Remeasure  makes hypothesis-testing methods for sample size calculation, often used in academia, accessible to project developers. Projects often use the MDD sample size, along with its impact on uncertainty to contextualize their ideal sample size.

Try out the
MDD Calculator

Measure and Model

BGCM True-up Calculator

For projects using Measure and Model, this calculator determines the minimum number of samples needed to conduct a statistically meaningful BGCM true-up. The goal of the true-up is a safeguard required by all major methodologies to avoid overestimation of SOC sequestration claims.

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True-up Calculator

Calculating EONS for BGCMs

The Economic Optimum Number of Samples (EONS) is the number of samples where project ROI is maximized.  For projects using Measure and Model, calculating EONS requires bespoke inputs for your chosen BGCM. Our team can provide you with EONS for your BGCM project.

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Digital Soil Mapping (DSMs)

Calculating EONS for DSM projects

For projects using a DSM, the Economic Optimum Number of Samples (EONS) is the sample size that optimizes project economics by balancing uncertainty deductions and sampling costs. Calculating EONS for DSMs requires customized consultancy, which Seqana provides.

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DSM Validation Sample Size Calculator

For projects using Digital Soil Maps (DSMs), the DSM Validation Calculator determines the sample size required for DSM validation tests. DSM validation is required by all major methodologies as an integrity safeguard to ensure SOC sequestration is not overestimated.

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