⭐ Starlight Tools / All-in-One Unit Converter

All-in-One Unit Converter

Convert between common units across multiple categories. Private, instant, client-side.

Tip: you can paste numbers with units like “10 km” or “5ft” — we’ll try to parse it.
Result:

About This Converter

This tool helps you convert measurements across the most common categories — length, mass, temperature, area, volume, speed, time, and digital storage — using precise conversion factors and clear formatting. Everything runs in your browser, so your inputs never leave your device.

How conversions work

  • Factor-based units (e.g., metres → feet, kilograms → pounds) use a base unit and scale factors for accuracy.
  • Temperature uses dedicated formulas (Celsius, Fahrenheit, Kelvin) rather than scale factors.
  • Time is normalised through seconds; Digital storage supports both SI (kB, MB) and binary (KiB, MiB) units.

Quick tips

  • Use the Swap button to quickly reverse your conversion.
  • Try pasting values like 10 km, 5ft, or 2 MiB — the parser will detect units.
  • Copy the result to share or document your calculation.