Unit Converter

Choose a category, pick the source and target unit, and convert your value instantly.

Runs 100% in your browser — your information is never sent to a server.
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How Does the Unit Converter Work?

This tool converts between the seven unit categories you'll run into most often in everyday life and at work: length, weight, temperature, area, volume, speed and data. For most categories the conversion follows simple logic: every unit has a factor relative to a shared "base unit" (for example meters for length, grams for weight); the value you enter is first converted to the base unit using that factor, then divided by the target unit's factor to produce the result in the unit you want. Temperature is the exception: Celsius, Fahrenheit and Kelvin don't share a common zero point, so a simple multiplier won't work — instead, the value is first converted to Celsius, then from Celsius to the target unit.

When to use it: converting American units like ounces or gallons in a recipe to grams or liters, reading a weather forecast in Fahrenheit as Celsius while traveling abroad, doing an inch-to-centimeter or mile-to-kilometer conversion for a school or engineering assignment, converting a file size from megabytes to gigabytes, or converting a vehicle's speed from km/h to mph to compare it against a foreign speed limit. Converting a "dönüm" value from a land listing into square meters, or converting a measurement shown abroad (acre, foot, pound) into a local unit, is another common use case.

Tips: use the ↔ button to swap the source and target units with a single click; two buttons below the result let you copy it to your clipboard or share it on WhatsApp. For the data (byte/KB/MB) category, this tool follows the common "binary base" convention (1 KB = 1024 bytes) — the traditional method operating systems use when showing file sizes. Very small or very large results (e.g. light-year calculations) automatically switch to exponential notation to stay readable. Changing the category automatically refreshes the source and target unit lists, so you don't have to start your selection over each time.

The value you enter and the units you select are processed entirely in your browser; no data is ever sent to or stored on a server. That means you can safely use this tool even for a sensitive calculation, such as double-checking a unit of measurement in a job offer.

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Frequently Asked Questions

Length (mm, cm, m, km, inch, foot, yard, mile), weight (mg, g, kg, tonne, pound, ounce), temperature (Celsius, Fahrenheit, Kelvin), area (cm², m², km², hectare, dönüm, square foot, acre), volume (mL, L, m³, US gallon, US pint), speed (m/s, km/h, mph, knot) and data (byte, KB, MB, GB, TB) categories are all supported.

For units like length or weight, zero is a shared reference point (0 meters = 0 kilometers), so a simple multiplier works. For temperature, 0°C is not the same point as 0°F — so the value is first converted to Celsius with °C = (°F − 32) × 5/9, then from Celsius to the target unit.

Because computers work in binary, operating systems (file sizes, RAM, etc.) traditionally display KB/MB/GB as multiples of 1024 — this tool follows that common "binary base" convention. (Some standards define separate units like KiB/MiB for the decimal base, but in everyday use KB/MB is usually base-1024.)

Results are calculated to 10 significant digits; when a result is extremely close to a whole number (e.g. 1 inch = 2.54 cm) it's shown as a whole number, and for very small or very large values it switches to exponential notation (e.g. 1.23e+15). The value you enter can also be a decimal (e.g. 3.5).

Click the ↔ button between the two fields to swap the source and target units in one move; you can see the result in the opposite direction without retyping the value.

The "Copy Result" button below the result copies the text to your clipboard, and the "Share Result" button opens your device's share menu (or WhatsApp).

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