Unit Converter
Convert length, weight, temperature, area, volume, speed, data & time instantly.
How it works
Three simple steps —everything happens in your browser.
Pick a category
Choose from 8 categories: length, weight, temperature, area, volume, speed, data, or time.
Enter a value
Type in either field — the other updates instantly. Swap units with one click.
See the formula
The conversion formula is shown beneath the result for reference.
Why choose Ercc Unit Converter?
8 categories
Length, weight, temperature, area, volume, speed, data, time — all in one tool.
Bidirectional
Type in either field. Both update instantly in real time.
100% private
All conversions run locally. No data is sent anywhere.
Pro Tips
- ● Click the swap button to reverse the conversion direction instantly.
- ● You can type in the result field too — the source value updates automatically.
- ● Data storage uses binary units (1 KB = 1024 bytes).
Frequently Asked Questions
Eight categories are supported: length, weight, temperature, area, volume, speed, digital data and time. Each category contains the most-used units, from millimeters to nautical miles, grams to tons, Celsius to Kelvin, and bits to gigabytes.
Yes. All conversions use standard SI factors at full double-precision floating point. Results round only for display, so calculations stay exact to roughly fifteen significant digits, which is well past anything you would notice in daily use.
Absolutely. The converter is fully bidirectional. Type a number in either field and the other updates instantly. There is no source or destination concept – any field can lead.
Once the page has loaded, all conversion math runs in your browser without further network requests. You can disconnect from the internet and keep using it, although the first load does require a connection.
No. Every conversion happens locally in JavaScript. Nothing you enter is uploaded, stored or transmitted to any server. The tool is fully private.