Sampling Assistant

Magnet Jambil

Contains adsIn-app purchases

About this app

Sample size calculator for researchers, students, and M&E / MEAL practitioners—plus allocate samples and draw random, systematic, stratified, or cluster samples.

SAMPLE SIZE CALCULATOR
• Cochran formula for known or unknown population size
• Yamane and Krejcie & Morgan for known populations
• Compare formulas side by side
• Reverse calculator: find the margin of error from completed responses
• Optional design effect and non-response adjustments
• Clear “how this was calculated” steps with formulas and your numbers

ALLOCATE SAMPLES
• Split total n across districts, sex, or other groups
• Proportional allocation from group sizes
• Export or copy the allocation table for your protocol

SAMPLING METHODS
• Simple random sampling
• Systematic sampling (every kth)
• Stratified sampling (by group quotas)
• Cluster sampling
• Upload CSV/Excel, paste a list, or draw IDs 1…N without a spreadsheet
• Reproducible draws with a random seed
• Export selected rows for fieldwork

BUILT FOR REAL PROTOCOLS
• Methods notes you can copy into a thesis or survey plan
• Works offline for core calculators; exports stay on your device
• Free to use, with an optional Pro unlock for unlimited exports and an ad-free experience

Sampling Assistant keeps calculate → allocate → select → export in one place.

What’s new

First public release of Sampling Assistant.

• Sample size calculators with clear formulas (e.g. Cochran)
• Allocate a sample across groups
• Draw random, systematic, stratified, or cluster samples
• Export results for your report
• Free: 2 unique exports/copies per day
• Pro: History, unlimited exports, and no ads