Calculator
Real expressions
Built-in converter
Paper-tape history
Scientific
Unit Converter
Values update as you type.
Features
A Real Engine
Type full expressions with brackets and precedence — no more chained two-number math.
Unit Converter
Length, weight, temperature, data and time, without leaving the ledger.
The Tape
A paper-tape history you can undo, export and reuse, entry by entry.
Built for Keys
Every function reachable without a mouse, with a shortcut sheet on hand.
Keyboard Shortcuts
About Ledger Calculator
Ledger Calculator began as a basic calculator during the Oasis Infobyte Web Development Internship, was rebuilt into a professional interface in v2.0.0, and now runs on a genuine expression engine of its own — tokenizer, parser and evaluator, no shortcuts.
v3.0.0 trades the borrowed glassmorphism look for a distinct paper-and-brass identity, and adds a unit converter, undo, and an installable offline app.
Current Version
v3.0.0The Ledger Edition