How to use Unit Converter
Convert length, mass, and temperature.
- Choose the operation and enter every labeled input, keeping units and the time period consistent.
- Calculate, compare the worked example below and inspect any warnings.
- Change one assumption to compare another scenario; keep the model’s limits in view.
Formula & calculation method
Linear conversions use published fixed relationships between units. Temperature uses an offset as well as a scale: °F = °C × 9/5 + 32 and K = °C + 273.15.
Input reference · 4 fields
These labels describe the calculation’s base units. Supported measurements can switch through the header’s region settings; follow the current workspace labels. Prefilled values are examples.
- Measurement
- Choose: Length, Weight, Temperature.
- Value
- Enter a plain number with a decimal point if needed. The workspace shows an illustrative value, not a recommendation.
- From
- Choose: Meters.
- To
- Choose: Feet.
A quick example
One inch equals 2.54 centimeters. 32°F equals 0°C.
Assumptions, edge cases & limits
- Absolute temperatures below zero Kelvin are rejected.
- Length and mass cannot be converted to one another; choose the correct measurement family.
- Uses international standard units; results are rounded for display.
Questions about Unit Converter
Can I convert feet to metres and pounds to kilograms?
Yes. Select Length or Weight, enter your value and choose the source and destination units. One foot is exactly 0.3048 metres and one pound is exactly 0.45359237 kilograms.
Why is converting Celsius to Fahrenheit not just multiplication?
The scales have different zero points. Multiply Celsius by 9/5 and then add 32; for example, 0 °C is 32 °F, not 0 °F.
Are my files or inputs uploaded?
Calculation and file processing run in your browser without a processing upload. Downloads go to your device. Choosing a next-step transfer creates a temporary local copy for that workflow. Region preferences are stored separately from tool inputs. See our privacy details.
Can I use this tool for free?
Yes. No signup, subscription or payment is required to use the tool or download its output. File tools have device and size limits; a smaller batch may work better on a phone.
A result or explanation needs correcting? Tell us the tool name and an example.