Text File Size Estimator
Estimate the approximate size of a plain text file either from the actual text or from a word count. Uses a realistic average of characters per word and bytes per character.
Result: No estimation yet.
Assumptions: average 5 characters per word, plus spaces and line breaks,
encoded as UTF‑8 (1 byte per ASCII character). This gives a realistic
approximation for plain text files.
Simple Sample Size Estimator
Calculate a basic sample size for a proportion‑based survey using standard statistics: confidence level, margin of error, and an estimated proportion. Includes optional finite population correction.
Result: No calculation yet.
Formula (infinite population):
Finite population correction (if N is given):
n₀ = (Z² · p · (1 − p)) / e², where Z is the z‑score for the chosen confidence level,
p is the estimated proportion, and e is the margin of error (in decimal form).
Finite population correction (if N is given):
n = n₀ / (1 + (n₀ − 1) / N).