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ToolNest

Unit Converter

Convert between units of length, weight, and temperature. Metric and imperial. Free, instant, and private.

Inputs never leave your browser Instant results Free, no signup

Category

Convert length

m
km
cm
mm
mi
yd
ft
in

Enter a value in any field and all others update instantly. Results are rounded to 6 decimal places.

Why use our Unit Converter?

Three categories

Length, weight, and temperature — all in one tool.

Real-time conversion

Enter a value in any field and all others update instantly.

Metric and imperial

Switch between unit systems without losing your input.

How to use Unit Converter

  1. 1

    Select the category you want to convert: Length, Weight, or Temperature.

  2. 2

    Enter a value in any one unit field.

  3. 3

    All other units in that category update instantly with the equivalent values.

  4. 4

    Switch categories at any time using the tabs.

About Unit Converter

The Unit Converter converts between common units in three categories: length (meters, kilometers, miles, feet, inches, centimeters, yards), weight (kilograms, grams, pounds, ounces, stones, tonnes), and temperature (Celsius, Fahrenheit, Kelvin). This is useful for cooking, construction, science homework, travel, and any situation where you need to translate between metric and imperial units. The converter runs entirely in your browser and updates results in real time as you type. All conversion factors are based on internationally recognized standards.

Privacy

All conversion happens entirely in your browser. Your inputs are never sent to any server.

Limitations

Results are rounded to 6 decimal places. For scientific or engineering applications requiring higher precision, use a dedicated conversion tool with adjustable precision.

Frequently Asked Questions