- Home
- Calculators
- CI for proportion
- CI for mean
- Means - effect size
- Means - sample size
- Proportions - effect size
- Proportions - sample size
- CI for proportion - sample size
- Survival analysis - sample size
- Prevalence
- CI for risk ratio
- More calculators...
- Calculator finder
- About calculating sample size
- About us
Sample Size Calculators
for designing clinical research
Need help? Request a consultation from sample-size.net developer Michael Kohn about sample size calculation, study design, data management, or statistical analysis.
All calculators on this site
Descriptive statistic
Compare two groups (hypothesis test)
Measurement is binary
Estimate precision given sample size
Proportion - Confidence interval given N
Seroprevalence - CI given N
Likelihood ratio - CI given N
Predictive value - CI given N
AUROC - CI given N
Risk ratio - CI given N
Estimate sample size given precision
Proportion - N given CI
AUROC - N given CI
Estimate detectable effect size
Proportions - Effect size
Estimate sample size
Proportions - Sample size (Standard)
Proportions - Sample size (Alternative)
Measurement is continuous
Estimate precision given sample size
Mean - Confidence interval given N
Estimate sample size given precision
Mean - N given confidence interval
Correlation coefficient - N
Estimate detectable effect size
Means - Effect size
Means - Effect size (Clustered)
Paired t-test - Effect size
Logistic regression - Effect size
Estimate sample size
Means - Sample size
Means - Sample size (Clustered)
Paired t-test - Sample size
Logistic regression - Sample size
Measurement is time-to-event (survival)
Estimate precision
Exponential failure rate - CI given N
Estimate sample size
Exponential failure rate - N given CI
Estimate sample size
Survival Analysis - Sample Size
Other calculators
Prevalence estimation
Posterior Probability of Disease
Pediatric Growth
Compare tests using McNemar's