Common units first
The tool focuses on units that often appear in engineering and documentation: m, km, cm, inch, ft, kg, g, lb, oz, C, F, and K.
Unit Converter
🔒 Browser-side processing
Convert common length, weight, and temperature units quickly.
Guide
Unit conversion checklist
Convert common length, weight, and temperature units to reduce unit mistakes in docs, code, and operations notes.
Two-way conversion
Switch From and To values or use the swap button to check the same quantity in the opposite direction.
Immediate calculation
Calculations run in the browser, so you can avoid jumping to a separate calculator or search result.
More: how to use it, examples, and common errors
Workflow
How to use it
- Select length, weight, or temperature.
- Enter the value and choose the source and target units.
- Review the result and use swap when you need the reverse conversion.
- When pasting into docs, decide the rounding and include the unit label.
Examples
Real input and output
Length
Input
100 kmOutput
62.1371 mile
328,084 ft
100,000 mTemperature
Input
25 °COutput
77 °F
298.15 KTroubleshooting
Errors you will hit
Why temperature behaves differently
Length and weight are pure scaling, but temperature scales have different zero points and need an offset. 0°C is 32°F, not 0°F. Converting a temperature difference is also not the same as converting a temperature.
Too many decimal places for a document
The result shows the raw computed value. Round to the precision you need and settle the unit notation before publishing.
Review
Things to check
Rounding policy
The tool shows the calculated value directly. For reports or UI text, round to the precision your audience expects.
Temperature has offsets
Temperature conversion is not a simple ratio. Always keep the unit label when mixing Celsius, Fahrenheit, and Kelvin.
Related
Tools that pair well
- IP / User-Agent — Review current browser IP, User-Agent, language, and timezone values to reproduce environment-specific issues.
- CIDR Calculator — Calculate network address, broadcast address, and usable IPv4 host ranges before changing firewall or subnet s
- Cron Parser — Check server jobs, worker schedules, and alert timing as readable text plus upcoming run times before deployin
- Timestamp Converter
- SHA Hash
- Password