Linear unit families
Most categories convert through a base unit. Unitly stores a conversion factor to the base unit and derives the target result from that shared reference path.
Methodology
How Unitly calculates, checks, and explains conversions.
Unitly is built to be fast, but not opaque. We use category-aware conversion logic, direct route pages, and public references so users can move quickly without losing confidence in the number they see.
232+Units modeled
7Reference links
100%Formula visible on route pages
Formula-driven categories
Temperature and other non-linear cases use explicit formulas instead of a single multiplication factor, which keeps the page logic aligned with the real math.
Reference tables and route pages
Direct converter pages show common values, formulas, related routes, and FAQs so users can cross-check results without leaving the page.
Review standard
What we optimize for on conversion pages
Use a category-aware conversion engine so special cases do not get forced into incorrect linear math.
Show formula descriptions and quick value tables on dedicated routes so the output is easier to verify.
Link to public standards and measurement guidance where those sources materially help users audit the result.
Reference library
Public standards and guidance we surface
BIPM SI Brochure
Authoritative SI reference published by the Bureau International des Poids et Mesures.
NIST SP 811
NIST guide to SI use, style, and conversion factors.
NIST on degree Celsius
Explains Celsius temperature relative to kelvin and temperature intervals.
NIST binary prefixes
Summarizes IEC binary prefixes such as kibi, mebi, and gibi.
NIST metric prefixes
Reference for decimal SI prefixes used across technical measurements.
NIST survey foot update
Confirms the international foot of exactly 0.3048 metre for modern use.
W3C CSS Values and Units
Defines CSS absolute length relationships such as 1 inch = 96 px and 1 point = 1/72 inch.
See the methodology in action on live converter pages.
Category hubs, direct route pages, formulas, and FAQs all connect back to this methodology so users can go from a broad search to an exact conversion route without losing context.