Kelvin [K] to Fahrenheit [°F] Converter
Advanced Scientific Temperature Converter with Quad-Scale Display, Material Database & Absolute Zero Visualization
Real-Time Quad-Scale Converter
Conversion Formulas:
❄️ Absolute Zero
0 K = -273.15°C = -459.67°F
The lowest possible temperature where all molecular motion ceases
Bulk Conversion Mode
Enter multiple Kelvin values (one per line) and convert them all at once:
Material Property Database
Quick reference for melting points, boiling points, and critical temperatures:
Scientific Temperature Presets
❄️ Cryogenic (0-100 K)
🌡️ Lab Standard (250-350 K)
🔥 Industrial (500-2000 K)
⚡ Astronomical (2000+ K)
📚 Understanding the Kelvin Scale
🔬 What is Kelvin?
The Kelvin scale is an absolute temperature scale named after Lord Kelvin (William Thomson, 1824-1907). It starts at absolute zero (0 K), the lowest possible temperature where all molecular motion ceases. Unlike Celsius or Fahrenheit, Kelvin has no negative values and uses no degree symbol (K, not °K).
📖 Historical Background
Developed by William Thomson (Lord Kelvin) in 1848, the Kelvin scale was initially based on the Celsius scale with absolute zero as its null point. The 2019 redefinition tied the Kelvin to the Boltzmann constant (k = 1.380649 × 10⁻²³ J/K), making it a fundamental SI unit independent of material properties.
🌡️ Key Reference Points
Absolute Zero: 0 K = -273.15°C = -459.67°F
Triple Point of Water: 273.16 K (exact, pre-2019 definition)
Water Freezing: 273.15 K = 0°C = 32°F
Water Boiling: 373.15 K = 100°C = 212°F (at 1 atm)
⚙️ 2019 Redefinition
On May 20, 2019, the Kelvin was redefined based on the fixed value of the Boltzmann constant. This change shifted the definition from material-based (triple point of water) to a fundamental constant, improving measurement accuracy and stability for scientific research.
🔬 Current Scientific Usage
Kelvin is the SI base unit for thermodynamic temperature. It's used extensively in:
• Physics and chemistry calculations
• Cryogenics and low-temperature research
• Astronomy and astrophysics
• Engineering and material science
• Climate science and meteorology (though Celsius is more common for weather)
🧠 Test Your Knowledge
🕐 Conversion History
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📊 Quick Reference Table
| Kelvin [K] | Fahrenheit [°F] | Celsius [°C] | Rankine [°R] |
|---|