Temperature Unit Conversion

FAQ

• What is the difference between Celsius, Fahrenheit, and Kelvin?
  Celsius (°C) uses water's freezing (0°C) and boiling (100°C) points. Fahrenheit (°F) uses a different scale with water freezing at 32°F and boiling at 212°F. Kelvin (K) is the absolute temperature scale starting from absolute zero (-273.15°C), used in scientific applications.
• Why is Kelvin used in scientific calculations?
  Kelvin is an absolute temperature scale with no negative values, making it ideal for scientific calculations involving gas laws, thermodynamics, and physics. It uses the same degree size as Celsius but starts from absolute zero, the theoretical point where all molecular motion ceases.
• How do I convert between Celsius and Fahrenheit?
  To convert °C to °F: multiply by 9/5, then add 32. To convert °F to °C: subtract 32, then multiply by 5/9. For example: 25°C = (25 × 9/5) + 32 = 77°F. Or 68°F = (68 - 32) × 5/9 = 20°C.
• What are some important temperature reference points?
  Absolute zero: -273.15°C (-459.67°F), water freezing: 0°C (32°F), room temperature: ~20°C (68°F), human body: 37°C (98.6°F), water boiling: 100°C (212°F) at standard pressure. These help put temperature measurements in context.
• Why does the US use Fahrenheit instead of Celsius?
  The US adopted Fahrenheit before the metric system became widespread. Fahrenheit was designed for practical daily use, with 0°F representing very cold winter weather and 100°F representing very hot summer weather. Most other countries adopted Celsius as part of the metric system.
• How accurate are temperature conversions?
  Temperature conversions are mathematically exact using the defined relationships. The calculator maintains high precision suitable for scientific, engineering, and everyday applications. The conversion formulas are based on internationally agreed-upon definitions of the temperature scales.