Passphrase Entropy Calculator (Diceware)

Calculate entropy of diceware passphrases. Formula: Entropy = words × log₂(wordlist size). A 6-word passphrase from 7,776-word EFF list has 77.5 bits of entropy.

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IP Subnet Calculator

IP Address
CIDR Prefix
/
Network
192.168.1.0
Broadcast
192.168.1.255
Subnet Mask
255.255.255.0
First Host
192.168.1.1
Last Host
192.168.1.254
Usable Hosts
254
Binary breakdown:
IP: 11000000.10101000.00000001.00000000
Mask: 11111111.11111111.11111111.00000000
Net: 11000000.10101000.00000001.00000000
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Formula Definitions

The Passphrase Entropy Calculator (Diceware) works by applying a well-defined formula to the values you enter. Understanding the formula behind the calculation helps you interpret the result and check that your inputs are correct. Below we break down the key components that drive the Passphrase Entropy.

The core formula used by this calculator is:

Result = f(inputs, settings)

Each variable in the formula has a specific meaning:

  • inputs — Values entered into the Passphrase Entropy.
  • settings — Options, units, or parameters that adjust how the calculation is performed.
  • Result — Computed output for the chosen inputs and settings.

How to Use This Calculator

  1. Enter the required values. Enter the required values into the Passphrase Entropy Calculator (Diceware) input fields.
  2. Adjust settings. Adjust any settings, select applicable options, or choose units as needed.
  3. Calculate the result. Press Calculate to compute the result using the underlying formula.
  4. Interpret the output. Review and interpret your result using the provided context, reference ranges, or explanatory notes.

Glossary and Definitions

Input
A value entered into the calculator to be processed.
Output
The computed result returned by the calculator for the given inputs.
Setting
An option that adjusts how the calculation is performed, such as unit selection or mode.
Passphrase entropy
A key concept referenced by the Passphrase Entropy: Calculate entropy of diceware passphrases. Formula: Entropy = words × log₂(wordlist size). A 6-word passphrase from 7,776-word EFF list has 77.5 bits of entropy.
Diceware entropy calculator
A key concept referenced by the Passphrase Entropy: Calculate entropy of diceware passphrases. Formula: Entropy = words × log₂(wordlist size). A 6-word passphrase from 7,776-word EFF list has 77.5 bits of entropy.
Eff passphrase calculator
A key concept referenced by the Passphrase Entropy: Calculate entropy of diceware passphrases. Formula: Entropy = words × log₂(wordlist size). A 6-word passphrase from 7,776-word EFF list has 77.5 bits of entropy.
Random passphrase strength
A key concept referenced by the Passphrase Entropy: Calculate entropy of diceware passphrases. Formula: Entropy = words × log₂(wordlist size). A 6-word passphrase from 7,776-word EFF list has 77.5 bits of entropy.

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Frequently Asked Questions