password length, character-space, account coverage and password-manager adoption calculators
Understand password planning without collecting passwords
Estimate character-space growth and account coverage from counts only. Never enter an actual password into these tools.
Tools
Tools
Character Search Space
Calculate theoretical combinations from alphabet size and password length.
Open →ToolsSearch-space Growth from One Extra Character
Show the multiplier from adding one character position.
Open →ToolsPassword Manager Coverage
Calculate managed accounts as a share of total accounts.
Open →ToolsUnique Password Coverage
Calculate accounts with unique passwords as a share of total.
Open →Guides
Guides
Never paste real passwords into calculators
Security tools should not need your secret value for planning math.
GuidesLength expands theoretical search space
Each added position multiplies combinations by the alphabet size.
GuidesUse unique passwords across accounts
Reuse can turn one credential exposure into many affected accounts.
GuidesUse a password manager to reduce reuse pressure
A manager can make unique credentials easier to maintain.