Unit Converter
About Unit Converter
Convert between common units for length, mass, temperature, area and volume. Switch units, enter a value and get precise results with sensible rounding.
If values come from URLs or Base64 logs, decode using the URL Encoder/Decoder or Base64 Encoder/Decoder, and inspect structured payloads with the JSON Formatter.
Supports mass/length/area/volume/time/pressure/power/force/speed/angle/energy. Pick a category, the tool auto-selects sensible default units; results update live. Use the right panel to read the main equation clearly.
Common Use Cases
- Quickly convert measurements for everyday tasks
- Verify units in specifications and QA scripts
- Explain unit relationships in lessons and docs
- Engineering specs and calibration conversions
- Cooking and recipe scaling (ml↔L, °C↔°F)
- Travel planning: speed/distance normalization (km/h↔m/s↔mph)
- Compare energy usage (Wh/kWh ↔ J/kJ)
- Pressure checks (bar/psi/kPa) for devices and tires
- Normalize units in ETL pipelines and data imports
How It Works
- Length/Mass/Area/Volume use scale factors to a base unit (SI where possible)
- Temperature conversions use standard formulas between C, F and K
- Results are rounded to 6 decimal places for readability
- All calculations run locally in your browser
- Unit symbols are mapped and standardized for clear display
- Last selection and input are persisted locally
- Constant-time lookups; no network requests
- Units are easy to extend via i18n and conversion maps
FAQ
Is the precision configurable?
Current display rounds to 6 decimals. This can be adjusted if you need higher precision.
Which units are supported?
See the dropdowns for each category; common SI and imperial units are included.
How are temperatures handled?
We convert via Kelvin internally and then map back to the selected unit (C/F/K).
Does it work offline?
Yes, calculations are client‑side with no network calls.