Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, and Rankine

Convert between different temperature scales with precision

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Temperature conversion is essential for science, cooking, weather, and international communication across different temperature scales.

✓ Instant conversion between 4 temperature scales including scientific units (Kelvin, Rankine)
✓ Bidirectional input - enter temperature in either field for instant conversion
✓ Precision to 2 decimal places ensuring accuracy for scientific calculations and cooking
✓ 100% client-side processing - your data never leaves your browser, ensuring complete privacy
✓ Mobile-friendly interface works perfectly on any device, anywhere

Q: When should I use Kelvin versus Celsius? Use Kelvin for scientific calculations, especially in chemistry and physics where absolute temperature matters. Kelvin starts at absolute zero (0K = -273.15°C), making it ideal for thermodynamics. Use Celsius for everyday measurements like weather, cooking, and body temperature.
Q: Why does Fahrenheit use 32° as the freezing point? Daniel Fahrenheit's original scale used three reference points: 0° for a brine solution freezing point, 32° for water freezing, and 96° for average human body temperature. This makes the scale more granular than Celsius for everyday temperatures.
Q: What is absolute zero and why is it important? Absolute zero (-273.15°C, -459.67°F, or 0K) is the theoretical lowest temperature where all molecular motion stops. It's impossible to reach but crucial for understanding thermodynamics and quantum physics.
Q: Are these conversions accurate enough for scientific work? Yes, our converter uses industry-standard formulas with precision to 2 decimal places, which is sufficient for most scientific and engineering applications. For ultra-precise work requiring more decimal places, consider specialized scientific software.
Q: Can I convert negative temperatures? Absolutely! Our converter handles the full range of temperatures, from absolute zero to extreme heat. This is especially useful for scientific applications and extreme weather conditions.

💡 Quick mental math: To estimate °F to °C, subtract 30 and divide by 2. It's not exact but close enough for quick checks (e.g., 68°F ≈ (68-30)/2 = 19°C, actual is 20°C).
💡 Cooking temperatures: Always double-check your recipe's temperature scale before baking. A cake at 180°C is perfect; at 180°F it won't even cook! US recipes use °F, European recipes typically use °C.
💡 Weather reference points: 0°C = 32°F (freezing), 25°C = 77°F (pleasant), 37°C = 98.6°F (body temp). Memorize these for quick international weather comparisons.
💡 Kelvin has no degree symbol: It's '273 K' not '273°K'. This is because Kelvin is an absolute scale, not a relative one like Celsius or Fahrenheit.
💡 For scientific accuracy: When working with gas laws or thermodynamic equations, always convert to Kelvin first. Most scientific formulas assume absolute temperature.

International Travel: Converting weather forecasts when traveling between countries using different temperature scales
Cooking & Baking: Converting recipe temperatures from US cookbooks (°F) to European ovens (°C) or vice versa
Scientific Research: Converting between Celsius and Kelvin for chemistry, physics, or engineering calculations
HVAC & Climate Control: Setting thermostats when specifications are in different units
Medical Applications: Converting body temperature readings between scales for international health records
Weather Reporting: Understanding temperature forecasts when consuming international news or traveling abroad

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