How do I convert units online?

Select a category (length, weight, temperature, etc.), choose your source and target units from the dropdowns, and enter a value. The result appears instantly.

What unit categories are supported?

Seven categories: Length (mm, cm, m, km, inch, foot, yard, mile), Weight (mg, g, kg, tonne, ounce, pound, stone), Temperature (Celsius, Fahrenheit, Kelvin), Area, Volume, Speed, and Data Storage.

How does temperature conversion work?

Temperature uses special formulas rather than simple ratios. The converter handles Celsius, Fahrenheit, and Kelvin conversions automatically and shows the formula used.

Can I convert in both directions?

Yes. Type in either input field to convert in that direction. Use the swap button to quickly reverse the units.

Is this unit converter free to use?

Yes. The converter is completely free with no signup, no ads covering content, and works entirely in your browser.

Convert Units Online — Free Unit Calculator

Convert between length, weight, temperature, area, volume, speed & data storage units instantly.

1 Pick a category › 2 Enter value › 3 Get result

How to Convert Units Online

Creatorr's unit converter provides instant, real-time conversions across seven major categories. No formulas to remember, no apps to install:

Pick a category — Click a pill button to switch between Length, Weight, Temperature, Area, Volume, Speed, or Data Storage.
Select your units — Choose the source unit (e.g., kilometers) and target unit (e.g., miles) from the dropdown menus.
Enter a value — Type in either input field. The conversion happens instantly as you type with no button click needed.
Swap or change — Hit the swap button to reverse direction, or change units and categories freely.

Supported Unit Categories

Length — Millimeters, centimeters, meters, kilometers, inches, feet, yards, miles. Ideal for everyday measurements, construction, and travel distances.
Weight — Milligrams, grams, kilograms, tonnes, ounces, pounds, stones. Covers cooking recipes, fitness tracking, and shipping weights.
Temperature — Celsius, Fahrenheit, Kelvin. Uses proper formulas rather than simple ratios, with the formula displayed for reference.
Area — Square centimeters, square meters, square kilometers, square inches, square feet, square yards, acres, hectares. Perfect for real estate and land measurements.
Volume — Milliliters, litres, cubic meters, teaspoons, tablespoons, cups, pints, gallons. Essential for cooking and liquid measurements.
Speed — Meters per second, km/h, mph, knots. Useful for travel, sports, and weather comparisons.
Data Storage — Bits, bytes, KB, MB, GB, TB. Handy for understanding file sizes, internet speeds, and storage capacity.

Why Use Creatorr's Unit Converter?

Instant results — Conversions update in real time as you type. No need to click "Convert" or wait for a server response.
Bidirectional — Type in either the source or result field. The other updates automatically.
Formula display — See the conversion factor or formula used, which is great for learning and verifying results.
Swap button — One click to reverse your conversion direction, with an animated rotation for a smooth experience.
Works everywhere — Runs entirely in your browser. No app download, no signup, works on any device.

Common Conversion Examples

Here are some frequently needed conversions: 1 mile equals 1.609 kilometers. 1 pound equals 453.6 grams. 0°C equals 32°F equals 273.15K. 1 gallon equals 3.785 litres. 1 acre equals 4,047 square meters. 100 km/h equals about 62.1 mph. 1 GB equals 1,024 MB. These are all available instantly in the converter above. For time zone calculations, try our Time Zone Converter. Working with documents? Check our TXT to PDF or Image Resizer tools.

Tips for Best Results

Use the formula box — Check the displayed conversion factor to understand the relationship between units.
Temperature is special — Unlike other categories, temperature uses formulas (not ratios). The formula box shows exactly which equation is applied.
Decimal precision — Results display up to 10 significant digits. For very small or very large numbers, the converter maintains accuracy.
Quick reverse — Instead of manually swapping dropdowns, click the swap button to instantly reverse units and values.

Frequently Asked Questions

How accurate are the conversions?

Conversions use standard conversion factors with full floating-point precision. Results are displayed with up to 10 significant digits.

Can I convert currency?

Not currently. Currency rates change constantly and would require an API. This tool focuses on fixed-factor unit conversions that work offline.

Does this work offline?

Yes. After the page loads, all calculations happen locally in your browser with no internet connection needed.

Why does temperature conversion use formulas instead of ratios?

Temperature scales have different zero points. Celsius to Fahrenheit requires offset (−32) and scaling (×5/9), not a simple multiplication factor.

Is Data Storage using binary (1024) or decimal (1000)?

Binary. 1 KB = 1,024 bytes, 1 MB = 1,024 KB, matching how operating systems report file sizes.

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