The Calculators and Utilities provided below may help you in developing your study.
Sample Size -- Means
Comparing means (t-test)
Sample Size -- Proportions
Comparing proportions (chi-square test)
Sample Size -- Confidence Interval For the Mean of a Continuous Measurement
Estimating a mean with a confidence interval of a particular width
Sample Size -- Confidence Interval For a Proportion
Estimating a proportion with a confidence interval of a particular width
Sample Size -- Survival Analysis
Estimating Sample Sizes for Time-to-Event Analysis
Posterior Probability of Disease Calculator
Determine the Posterior Probably of Disease Given a Particular Test Result
BMI Percentile Calculator - Pediatric
Pediatric BMI Percentile Calculator based on weight and height. Provides BMI and Percentile based on age and gender
BMI Calculator - Adult
Simple BMI Calculator based on weight and height
Blood Pressure Calculator - Pediatric
Pediatric Blood Pressure Calculator based on age and height. Provides Percentiles for SBP and DBP
Note: The software for the Pediatric BMI and Blood Pressure are Beta and results should be reviewed carefully. They are newly developed and are being tested.