Convert length, weight and temperature units online.
Unit conversion helps you express the same measurement using a different unit. This free converter supports length, mass and temperature calculations directly in your browser.
Choose a measurement category, enter a numeric value, select the original and destination units, then press Convert.
The calculator supports decimal values and negative numbers. After changing a value or unit, press Convert again to calculate a new result.
Convert between meters, kilometers, centimeters and international miles.
Convert between kilograms, grams and avoirdupois pounds. The interface calls this category Weight, but these units measure mass rather than force.
Convert between degrees Celsius and degrees Fahrenheit.
One international mile equals exactly 1609.344 meters.
Enter 1, select Length, choose Mile as the source unit and Meter as the destination unit.
The result is 1609.344 meters. This is useful when comparing distances recorded in different measurement systems.
One kilometer equals 1000 meters. For example, 1.5 kilometers equals 1500 meters.
This conversion is useful when comparing longer distances with measurements expressed in meters.
One hundred centimeters equal one meter. Therefore, 250 centimeters equal 2.5 meters.
This can help when reviewing furniture dimensions or other everyday measurements.
One avoirdupois pound equals exactly 0.45359237 kilograms.
For example, enter 1, select Weight, choose Pound and then Kilogram to see the converted mass.
One kilogram equals 1000 grams. Therefore, 500 grams equal 0.5 kilograms.
These conversions can be useful when comparing product masses, food ingredient quantities or shipping measurements.
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32.
For example, 0 degrees Celsius equals 32 degrees Fahrenheit.
Similarly, 100 degrees Celsius equals 212 degrees Fahrenheit.
To convert Fahrenheit to Celsius, subtract 32 and multiply the result by 5/9.
For example, 98.6 degrees Fahrenheit equals 37 degrees Celsius.
An interesting reference point is minus 40 degrees: -40 Celsius and -40 Fahrenheit represent the same temperature.
The converter uses defined conversion factors and JavaScript numeric calculations.
Results are displayed using up to 12 significant digits. Significant digits are not the same as a fixed number of decimal places.
Some decimal values cannot be represented exactly using ordinary floating-point arithmetic. Small rounding differences may therefore occur.
For specialized scientific, engineering or regulatory calculations, verify the required precision and measurement definitions.
Only the nine units listed in this tool are supported. It does not currently convert currency, volume, area, speed or other unit categories.
The tool accepts negative numeric values, but a mathematically valid result does not necessarily represent a physically meaningful measurement.
Very large numeric inputs may exceed the supported numeric range.
The calculator does not independently verify whether an entered measurement is appropriate for a particular real-world application.
Unit conversion calculations take place in your browser. The converter does not need to submit the entered value to an external conversion API.
When you select Copy, the displayed conversion result is placed on your device's clipboard if clipboard access is available.
Yes. You can convert the supported units without paying for the tool.
Yes. Decimal values are supported. For example, you can convert 1.5 kilometers into meters.
Yes. The calculator accepts negative numbers, including negative temperatures. Consider whether negative values make sense for the measurement being converted.
Changing the input or selected units clears the previous result to prevent confusion. Press Convert to calculate the updated value.
The tool displays up to 12 significant digits. Floating-point calculations may introduce small rounding differences.
Yes. Choose Weight, select Kilogram as the original unit and Pound as the destination unit.
No. Kelvin and ounces are not included in the current selection of units.
The conversion functions run locally in your browser without calling an external unit-conversion API.