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Sample Size & Power Calculations
Calculate for a Variety of frequentist and Bayesian Design

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Design and Analyze a Wide Range of Adaptive Designs

Milestone Prediction
Predict Interim Analysis Timing or Study Length

Randomization Lists
Generate and Save Lists for your Trial Design
CAPABILITIES

Group Sequential and Promising Zone Designs
Calculate Boundaries & Find Sample Size. Evaluate Interim Data & Re-estimate Sample Size

Sample Size for Bayesian Statistics
Probability of Success (Assurance), Credible Intervals, Bayes Factors and more

Early Stage and Complex Designs
Sample size & operating characteristics for Phase I, II & Seamless Designs (MAMS)
Pricing
Free Trial
SOLUTIONS

Sample Size & Power Calculations
Calculate for a Variety of frequentist and Bayesian Design

Adaptive Design
Design and Analyze a Wide Range of Adaptive Designs

Milestone Prediction
Predict Interim Analysis Timing or Study Length

Randomization Lists
Generate and Save Lists for your Trial Design
CAPABILITIES

Group Sequential and Promising Zone Designs
Calculate Boundaries & Find Sample Size. Evaluate Interim Data & Re-estimate Sample Size

Sample Size for Bayesian Statistics
Probability of Success (Assurance), Credible Intervals, Bayes Factors and more

Early Stage and Complex Designs
Sample size & operating characteristics for Phase I, II & Seamless Designs (MAMS)
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Sample Size Resource Center

Improve your knowledge and calculation of sample size

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How to use nQuery
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Sample Size Calculation for Survival Analysis in nQuery
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Sample Size Calculation for a MAMS design in nQuery
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FDA Guidance on Adaptive Sample Size Re-estimation

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Innovative Sample Size Methods for Clinical Trials

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5 Essential Steps for Sample Size Determinations

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(Guide) 5 Essential Steps to Calculate Sample Size

Correctly calculate sample size by following these 5 steps

Go to Guide
tutorial How to Calculate Sample Size - Step 1 - Plan Your Study

Step 1) Plan Your Study
tutorial How to Calculate Sample Size - Step 2 - Specify Parameters

Step 2) Specify Parameters
tutorial How to Calculate Sample Size - Step 3 - Choosing Your Effect Size

Step 3) Choose Effect Size
tutorial How to Calculate Sample Size - Step 4 - Compute Sample Size

Step 4) Compute Sample Size or Power
tutorial How to Calculate Sample Size - Step 5 - Explore Uncertainty

Step 5) Explore Uncertainty

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