printfn/fend
Arbitrary-precision unit-aware calculator observed · 2026-08-28
Health v2 · maintenance only
77/100
- Activity 93
- Release rhythm 43
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 117
- age_days: 2224
- days_rel: 221
- days_push: 43
- n_releases_24m: 6
Adoption not part of the score
1027 stars · 72 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
fend is an arbitrary-precision, unit-aware calculator written in Rust, available as a CLI REPL, a Rust library (fend-core), and a web interface. It supports SI, US/UK customary and historical units, complex numbers, variables, multiple number bases, dice rolls, and lambda calculus.
Use cases
- convert 1 ft to cm from the terminal
- do arbitrary-precision math without floating point errors
- calculate with units of measure like SI and imperial units
- convert between hex, binary, octal and other bases
- roll D&D-style dice from the command line
- embed a unit-aware calculator into a Rust application
When to choose
- you need a fast terminal calculator with unit conversion
- you need exact rational arithmetic instead of floating point
- you want a calculator library to embed in Rust projects
When to avoid
- you need a full spreadsheet or symbolic algebra system (CAS)
- you need graphing or plotting capabilities
Facets
cli-tool · maturity active
math cli mathematics developer-tools cli cross-platform windows calculator units-of-measure arbitrary-precision unit-conversion repl rust command-line linux macos web-server
3 sources
- readme: https://github.com/printfn/fend · fetched 2026-08-28 · aa4b837a28b2
- homepage: https://printfn.github.io/fend · fetched 2026-08-29 · 221f5cd04146
- registry_crates: https://crates.io/api/v1/crates/fend · fetched 2026-08-29 · 30d1bade5454
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| printfn/fend | main | 77 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem