Ultimate Unit Converter

Expression input, smart unit search, favorites, history, permalink & formula steps — all offline, ultra-fast.

Dark

Convert (type expression or number + unit)

Examples: (5+3)*2 km 100 mi

Auto-detects unit from expression. Use "to " to force target, or choose below.

Precision: Auto-scale:

—

Converted value

Unit Search

Details

Detected:

—

Target:

—

Precision:

History

Favorites

Shortcuts: Ctrl/Cmd+K focus, Esc clear