Unit Converter

Frequently Asked Questions

What unit categories does the converter support?

The converter supports Length (mm to nautical miles), Weight/Mass (mg to metric tons), Temperature (Celsius, Fahrenheit, Kelvin, Rankine), Area (mm² to square miles), Speed (m/s to knots), and Volume (milliliters to US gallons). Each category includes both metric and imperial units.

How do I convert Celsius to Fahrenheit?

Select the Temperature category, choose Celsius as the "From" unit and Fahrenheit as the "To" unit, then enter the temperature. The formula is °F = (°C × 9/5) + 32. For example: 100°C = 212°F (water boiling point), 0°C = 32°F (water freezing point), 37°C = 98.6°F (body temperature).

What is the difference between metric and imperial units?

The metric system (SI) is based on powers of 10 (km, m, cm, mm) and is used globally in science and by most countries. The imperial system (miles, feet, inches, pounds, gallons) is used primarily in the United States, the UK (for some units), and a few other countries.

How many feet are in a meter?

1 meter = 3.28084 feet (or exactly 1/0.3048 feet). Conversely, 1 foot = 0.3048 meters exactly (this is the defined conversion since 1959). Select Length, choose m → ft and enter 1 to confirm: you'll see 3.28084.

How many kilograms are in a pound?

1 pound (lb) = 0.45359237 kilograms (exact by definition since 1959). 1 kilogram = approximately 2.20462 pounds. Select Weight, choose kg → lb and enter 1: you'll see 2.20462. To convert your body weight, use the lb → kg direction.

How do I convert square feet to square meters?

Select the Area category, choose ft² as "From" and m² as "To". 1 square foot = 0.0929 m². For example, 1,000 sq ft ≈ 92.9 m². This conversion is common in real estate when comparing property sizes internationally.

Why does the converter use exact SI definitions?

The 2019 SI redefinition fixed exact values for base units using fundamental constants. Conversion factors between metric and imperial units are defined exactly (e.g. 1 inch = 25.4 mm exactly). This means the converter provides maximum possible precision, limited only by floating-point arithmetic.