Universal Unit Converter

The metric system (SI) uses units like meters, kilograms, and liters, and is based on powers of 10, making it easy to convert between units. It's used by most countries worldwide. The imperial system (used primarily in the USA) uses feet, pounds, and gallons, with less intuitive conversion ratios. For example: 1 meter = 100 centimeters (metric), while 1 yard = 3 feet = 36 inches (imperial). Our converter handles both systems seamlessly.

Our converter uses internationally recognized conversion factors with high precision. For most practical purposes, the results are accurate to many decimal places. However, some conversions (especially temperature) use formulas rather than simple multiplication. All calculations are performed using JavaScript's native number precision. For critical applications requiring extreme precision, always verify with official standards.

Temperature conversions use formulas instead of simple ratios:

• Celsius to Fahrenheit: (°C × 9/5) + 32 = °F
• Fahrenheit to Celsius: (°F - 32) × 5/9 = °C
• Celsius to Kelvin: °C + 273.15 = K
• Kelvin to Celsius: K - 273.15 = °C

Just select the temperature converter tab, enter your value, choose your units, and we'll calculate it automatically with the correct formula.

Our length converter supports: Meter (m), Kilometer (km), Centimeter (cm), Millimeter (mm), Mile (mi), Yard (yd), Foot (ft), Inch (in), and Nautical Mile (nmi). This covers both metric and imperial systems, plus nautical measurements. Common conversions include: 1 km = 0.621 miles, 1 meter = 3.281 feet, 1 inch = 2.54 cm.

Technically, mass is the amount of matter (measured in kilograms) and doesn't change, while weight is the force of gravity on that mass (measured in newtons). However, in everyday usage, people often say "weight" when they mean mass. Our "Weight" converter actually converts mass units: kilogram, gram, milligram, pound, ounce, ton, and stone. For most practical purposes on Earth, these conversions work perfectly for what people call "weight."

The swap button (with arrows icon) instantly switches your "from" and "to" units. For example, if you're converting meters to feet, clicking swap will flip it to convert feet to meters. This saves time when you need to reverse a conversion. The value automatically updates based on the swapped units, making it easy to see conversions in both directions.

GB (Gigabyte) uses decimal (base 10): 1 GB = 1,000 MB = 1,000,000,000 bytes. This is the standard used by storage manufacturers and is the SI standard.

GiB (Gibibyte) uses binary (base 2): 1 GiB = 1,024 MiB = 1,073,741,824 bytes. This is what operating systems often display.

That's why a "500 GB" hard drive shows as about 465 GiB in your OS. Our converter supports both systems so you can understand the real capacity of your storage devices.

You can't directly convert between different types of measurements because they measure different physical properties. Length measures distance, weight measures mass, volume measures 3D space, etc. They're fundamentally different. However, you might be able to use multiple conversions for complex calculations. For example, if you know the density of a material, you could convert volume to weight (density × volume = mass), but you'd need additional information beyond simple unit conversion.

Our volume converter is perfect for cooking! We support: Liter (L), Milliliter (ml), Cubic Meter (m³), Gallon (gal), Quart (qt), Pint (pt), Cup, Fluid Ounce (fl oz), and Tablespoon (tbsp). Common conversions: 1 cup = 240 ml, 1 gallon = 3.785 liters, 1 tablespoon ≈ 15 ml. This makes it easy to follow international recipes or scale measurements up and down.

Use our Area converter which supports: Square Meter (m²), Square Kilometer (km²), Square Centimeter (cm²), Square Mile (mi²), Square Yard (yd²), Square Foot (ft²), Square Inch (in²), Hectare (ha), and Acre. Key real estate conversions: 1 acre = 43,560 sq ft = 0.405 hectares, 1 hectare = 10,000 m² = 2.471 acres. Perfect for comparing property sizes across different regions and measurement systems.

Yes, this universal unit converter is 100% free to use! No registration, no login, no hidden fees. Just select your category, enter a value, choose your units, and convert. You can use it as many times as you want, whenever you need it. We believe essential tools like this should be accessible to everyone without barriers.