Search Ctrl K
Home / Tools
THE FEUTEX TOOLKIT

Bloom Filter Size and Hash Count

Estimate bit storage and near-optimal hash count for a false-positive target.

Computer Systems workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
Formulam=−nln(p)/(ln2)²; k≈−ln(p)/ln2
Sources and model references

How to use this tool

  1. Enter the labeled inputs in the indicated units.
  2. Calculate and compare every output against the stated model assumptions.

Try this example

{
  "n": 1000000,
  "p": 0.01
}

Accuracy and scope

Classic Bloom filter with ideal independent hashes, no deletions and expected insertion count. Simplified analytical model; not a design recommendation or safety certification.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.