Free Resources
Free tools and templates for researchers
Calculators, frameworks, and guides to support your research — free to use, no signup required.
Calculators & interactive tools
Sample Size Calculator
Calculate the minimum sample size needed for your study using Cochran's formula, with finite population correction.
Use the calculator →PICO Framework Builder
Turn a broad topic into a focused, answerable research question using the PICO framework.
Use the builder →PRISMA Flow Diagram Generator
Enter your record counts and get a PRISMA 2020-style flow diagram instantly.
Use the generator →Newcastle-Ottawa Scale Calculator
Score a cohort or case-control study's quality across Selection, Comparability, and Outcome/Exposure.
Use the calculator →Effect Size Calculator
Cohen's d and Hedges' g for continuous outcomes, or odds ratio and risk ratio with 95% CIs for binary outcomes.
Use the calculator →Median to Mean & SD Converter
Estimate a mean and SD from a reported median and range or interquartile range.
Use the converter →Reference Deduplication Tool
Paste your search results to flag exact and likely near-duplicate citations before screening.
Use the tool →Guides
PRISMA 2020 Checklist
A practical walkthrough of what each PRISMA 2020 item requires.
Read the guide →How to Conduct a Systematic Review
The full process from research question to PRISMA-compliant report.
Read the guide →Templates & checklists
Copy these directly, or use them as a starting point for your own review or study.
Systematic Review Protocol Template
Every section PROSPERO and journal reviewers expect.
Use the template →Risk of Bias Templates
Summary tables for RoB 2, ROBINS-I, and Newcastle-Ottawa Scale.
Use the templates →GRADE Certainty Checklist
Work through certainty-of-evidence ratings for each outcome.
Use the checklist →Sample Informed Consent Form
A structural starting point — requires IRB/ethics board approval before use.
Use the template →