Meta-analysis tools and calculators
A set of free calculators for the quantitative side of a systematic review: pooling study estimates, measuring heterogeneity, converting between effect measures, checking screening agreement, and testing for publication bias. Each one shows the formula behind the number, so it is a working tool, not a black box.
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Meta-analysis calculatorPool study effect estimates with fixed-effect and random-effects models, with the heterogeneity statistics shown.Open tool Heterogeneity calculator (I-squared, Q, tau-squared)Quantify how much your studies disagree: Cochran's Q, I-squared, H, and the between-study variance tau-squared.Open tool Odds ratio and risk ratio calculatorTurn a 2x2 table of events into an odds ratio, risk ratio, and risk difference, each with a 95% confidence interval.Open tool Standardized mean difference calculatorCompute Cohen's d and Hedges' g from two groups' means, standard deviations, and sample sizes.Open tool Effect size converterConvert between odds ratios, standardized mean differences, and correlations to put every study on one scale.Open tool Confidence interval calculatorBuild a confidence interval for a ratio measure, a mean difference, or a single proportion, at any level.Open tool Cohen's kappa calculatorMeasure agreement between two screeners from their include and exclude counts, with the observed and expected agreement.Open tool Forest plot generatorPlot your studies with weight-scaled markers and a pooled diamond, and download the forest plot as an SVG.Open tool PRISMA 2020 checklist toolWork through all 27 PRISMA 2020 items with progress saved, then export the completed checklist for submission.Open tool
More calculators
Number needed to treat calculatorConvert event rates into absolute risk reduction and the number needed to treat, with a confidence interval.Open tool Single proportion confidence interval calculatorGet a confidence interval for one proportion or prevalence, using exact and Wilson score methods.Open tool Publication bias calculator (Egger's test)Run Egger's regression test for funnel-plot asymmetry from your studies' effect estimates and standard errors.Open tool PRISMA flow diagram generatorTurn your record counts into a clean, reconciled PRISMA 2020 flow diagram and download it as an SVG.Open tool Funnel plot generatorScatter your studies by effect and standard error with the pooled estimate and pseudo 95% limits, downloadable as an SVG.Open tool
Working through the synthesis itself? The systematic review guides explain the methods behind these tools, and our statistical analysis service runs the full pooled analysis when you would rather hand it over.