Unit Converter: Length, Weight, Temperature & More (Free Online)

Whether you're following a recipe in metric, shipping something measured in inches, reading a temperature in the wrong scale, or sizing a file in gigabytes, you need a quick, reliable conversion — without an ad-cluttered page that tracks you. A good unit converter handles all the common categories in one place and gives you the answer instantly. Here's how to use one and the conversions people reach for most.

What it converts

The free Unit Converter covers the categories you actually use:

• Length — meters, feet, miles, kilometers, inches, centimeters.
• Weight — kilograms, pounds, ounces, grams.
• Temperature — Celsius, Fahrenheit, Kelvin.
• Area — square meters, square feet, acres, hectares.
• Volume — liters, gallons, cups, milliliters.
• Data — bytes, KB, MB, GB, TB.
• Speed — km/h, mph, m/s, knots.
• Time — seconds, minutes, hours, days.

How to use it

1. Open it — no signup, no ads.
2. Pick the category (length, weight, temperature, etc.).
3. Enter a value and choose the units to convert from and to.
4. Get the result instantly.

It runs entirely in your browser, so it's fast and works offline once loaded — handy when you're converting on the go with a weak signal.

The conversions people look up most

• Celsius ↔ Fahrenheit — the perennial one. (C × 9/5 + 32 = F.)
• Kilometers ↔ miles — travel and running distances.
• Kilograms ↔ pounds — shipping, fitness, recipes.
• Centimeters/meters ↔ feet/inches — height and dimensions.
• Liters ↔ gallons, milliliters ↔ cups — cooking and fuel.
• MB ↔ GB — file and storage sizes.

A converter that keeps all of these one click apart beats searching each one individually.

Why a no-ads, no-tracking converter matters

Unit converters are one of the most ad-saturated corners of the web — pages so cluttered with banners and pop-ups that the actual conversion is hard to find, all while loading trackers. A converter that's free, fast, client-side, and free of ads and tracking just does the job and gets out of your way. That's the whole idea.

Common questions

What can it convert? Length, weight, temperature, area, volume, data, speed, and time — the common everyday categories.

Does it work offline? Once the page has loaded, yes — it runs in your browser with no server calls.

Is it free with no ads? Yes — no signup, no ads, no tracking.

Related reading: explore the other free tools, including the Color Picker and Number to Words.

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