Unit Converter
What Is Unit Conversion?
Unit conversion is the process of expressing a quantity in a different unit of measurement while preserving the same underlying value. The world uses two major measurement systems — the metric system (meters, kilograms, liters) used by most countries, and the imperial system (feet, pounds, gallons) used primarily in the United States. Converting between these systems is a frequent need in cooking, travel, science, engineering, and international trade. This tool handles conversions across four categories instantly and accurately.
How to Use
Select a category (length, weight, volume, or speed), enter a value, and choose the source unit. All conversions within that category are displayed instantly.
Supported Units
Length: mm, cm, m, km, in, ft, yd, mi. Weight: mg, g, kg, oz, lb, metric ton. Volume: ml, L, US gal, qt, pt, cup, fl oz. Speed: m/s, km/h, mph, knots, ft/s.
Common Use Cases
- Cooking — convert recipe measurements between metric and imperial cups, ounces, and grams
- Engineering — translate specifications between metric and imperial systems
- International trade — convert product dimensions and weights for shipping
- Travel — understand speed limits, distances, and weights in different countries
- Fitness — convert between kilograms and pounds for workout tracking
Supported Categories
- Length — from millimeters to miles, covering both metric and imperial units
- Weight — from milligrams to metric tons, including ounces and pounds
- Volume — from milliliters to gallons, including cooking measurements
- Speed — from meters per second to knots, covering land, sea, and air
Privacy
All processing happens in your browser. No data is sent to any server.
FAQ
What is the difference between the metric and imperial systems?
The metric system is based on meters, kilograms, and liters and is used by most countries. The imperial system uses feet, pounds, and gallons and is used mainly in the United States. This tool converts between units in both systems.
Are the values I enter sent to a server?
No. All conversion calculations run in your browser, and the values you enter are never sent to or stored on any server.
Which categories and units are supported?
It supports four categories: length (mm to miles), weight (mg to metric tons), volume (ml to gallons, including cooking measures), and speed (m/s to knots). Pick a category and the tool shows conversions to every unit within it.
Can it convert cooking measures like cups and ounces correctly?
Yes. The volume category includes cooking measures such as cups and fluid ounces. Note that ounces differ between weight (oz) and volume (fl oz), so choose the category that matches the quantity you want to convert.
Can it convert temperatures?
No. This tool covers four categories — length, weight, volume, and speed — and does not include temperature. Use a dedicated temperature converter for Celsius, Fahrenheit, and the like.