Calculator Converter

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Temperature Converter

Celsius (°C) Fahrenheit (°F) Kelvin (K)
Fahrenheit (°F) Celsius (°C) Kelvin (K)
Enter values and click "Convert Temperature" to see the result.
function calculateTemperatureConversion() { var inputValue = parseFloat(document.getElementById("inputValue").value); var inputUnit = document.getElementById("inputUnit").value; var outputUnit = document.getElementById("outputUnit").value; var resultDiv = document.getElementById("result"); var convertedValue; var outputUnitSymbol; if (isNaN(inputValue)) { resultDiv.innerHTML = "Please enter a valid number for the value to convert."; return; } // Convert input to a common base (e.g., Celsius) first var valueInCelsius; if (inputUnit === "celsius") { valueInCelsius = inputValue; } else if (inputUnit === "fahrenheit") { valueInCelsius = (inputValue – 32) * 5 / 9; } else if (inputUnit === "kelvin") { valueInCelsius = inputValue – 273.15; } // Convert from common base (Celsius) to desired output unit if (outputUnit === "celsius") { convertedValue = valueInCelsius; outputUnitSymbol = "°C"; } else if (outputUnit === "fahrenheit") { convertedValue = (valueInCelsius * 9 / 5) + 32; outputUnitSymbol = "°F"; } else if (outputUnit === "kelvin") { convertedValue = valueInCelsius + 273.15; outputUnitSymbol = "K"; } resultDiv.innerHTML = "Converted Value: " + convertedValue.toFixed(2) + " " + outputUnitSymbol; }

Understanding Temperature Conversion

Temperature is a fundamental physical quantity that expresses hot and cold. It is measured using a thermometer and is crucial in various fields, from daily weather forecasts to scientific research and industrial processes. However, different scales are used around the world, necessitating conversion between them.

The Major Temperature Scales:

  • Celsius (°C): Also known as centigrade, this scale is widely used globally. It defines the freezing point of water as 0°C and the boiling point as 100°C at standard atmospheric pressure.
  • Fahrenheit (°F): Primarily used in the United States and a few other countries, the Fahrenheit scale sets the freezing point of water at 32°F and the boiling point at 212°F.
  • Kelvin (K): This is the base unit of temperature in the International System of Units (SI) and is an absolute thermodynamic temperature scale. 0 Kelvin (absolute zero) is the theoretical point at which all molecular motion ceases. There are no degrees in Kelvin; it's simply "Kelvin."

Why Convert Temperatures?

Temperature conversion is essential for several reasons:

  • International Communication: When discussing weather, scientific data, or product specifications across different countries, converting temperatures ensures everyone understands the values correctly.
  • Scientific Accuracy: Many scientific formulas and calculations require temperatures in Kelvin, especially in thermodynamics and chemistry.
  • Recipe and Manufacturing: Cooking recipes or industrial processes might specify temperatures in a scale unfamiliar to the user, requiring quick conversion.
  • Travel and Daily Life: Understanding local weather reports while traveling abroad often requires converting between Celsius and Fahrenheit.

How Our Temperature Converter Works

Our calculator simplifies the process of converting temperatures between Celsius, Fahrenheit, and Kelvin. You simply input the temperature value, select its current unit, and then choose the unit you wish to convert it to. The calculator then applies the appropriate mathematical formulas:

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

Examples of Temperature Conversion:

Let's look at some common conversions:

  • Example 1: Room Temperature
    If your room is 22°C, converting to Fahrenheit: (22 × 9/5) + 32 = 71.6°F.
  • Example 2: Freezing Point
    Water freezes at 32°F. Converting to Celsius: (32 - 32) × 5/9 = 0°C. Converting to Kelvin: 0 + 273.15 = 273.15 K.
  • Example 3: Absolute Zero
    Absolute zero is 0 K. Converting to Celsius: 0 - 273.15 = -273.15°C. Converting to Fahrenheit: (-273.15 × 9/5) + 32 = -459.67°F.

Use the calculator above to quickly and accurately perform your temperature conversions!

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