Unit Converter: Length, Mass, Temperature, Area & Speed
Convert six physical unit categories and compare every unit in the selected group, entirely in your browser.
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1. Input and options
Runs in page memory, without uploading or saving input. Text input and generated output: 1 MiB UTF-8 each. Copy is explicit; results clear whenever inputs change.
Uses floating-point estimates, not measurement uncertainty or financial arithmetic. US liquid and Imperial gallons are explicitly distinct.
NIST SI conversion factors · Reference data: 2026-10-17
2. Result
Enter input or load a sample, then run.
If clipboard access is denied, select the output and copy manually.
How to use this tool
Select a category, source value, source unit and target unit. Convert to see the target and complete conversion table.
When not to use it
Uses floating-point estimates, not measurement uncertainty or financial arithmetic. US liquid and Imperial gallons are explicitly distinct.