Kelvin Temperature Converter - Free Online Scientific Calculator
Kelvin Temperature Converter
Convert between Kelvin (K), Celsius (°C), and Fahrenheit (°F). Essential for physics and chemistry calculations involving absolute temperature.
Formula from Kelvin:
°C = K - 273.15
Formula from Kelvin:
°F = (K - 273.15) × 9/5 + 32
Absolute Temperature Scale
Kelvin
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Celsius
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Fahrenheit
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⚛️ Scientific Temperature Points
| Phenomenon | Kelvin | Celsius | Fahrenheit |
|---|---|---|---|
| Absolute Zero | 0 K | -273.15°C | -459.67°F |
| Nitrogen Boils | 77.36 K | -195.79°C | -320.42°F |
| Dry Ice Sublimes | 194.65 K | -78.5°C | -109.3°F |
| Triple Point of Water | 273.16 K | 0.01°C | 32.018°F |
| Room Temperature | 293.15 K | 20°C | 68°F |
| Body Temperature | 310.15 K | 37°C | 98.6°F |
| Iron Melts | 1811 K | 1538°C | 2800°F |
| Sun's Surface | 5778 K | 5505°C | 9941°F |
📐 Conversion Formulas
From Kelvin
°C = K - 273.15
°F = (K - 273.15) × 9/5 + 32
To Kelvin from °C
K = °C + 273.15
Simply add 273.15
To Kelvin from °F
K = (°F - 32) × 5/9 + 273.15
Convert to °C first, then add 273.15
How to use this calculator
🔬 How to Use This Calculator
- Enter a temperature in any of the three scales: Kelvin, Celsius, or Fahrenheit
- The other two scales will be calculated automatically
- Use the constant buttons for common scientific temperatures
- View the temperature on the absolute scale visualization
- Reference the table for important scientific temperature points
📐 Understanding Kelvin
What is Kelvin?
Kelvin is the base unit of temperature in the International System of Units (SI). It's an absolute temperature scale starting at absolute zero, where all molecular motion stops.
Why Use Kelvin?
- • No negative values (simplifies calculations)
- • Direct proportionality to thermal energy
- • Standard for scientific equations
- • Used in gas laws (PV = nRT)
🌟 Scientific Applications
Physics
- • Thermodynamics calculations
- • Blackbody radiation (Wien's law)
- • Gas law problems
- • Entropy calculations
Chemistry
- • Reaction kinetics
- • Equilibrium constants
- • Phase transitions
- • Ideal gas calculations
💡 Teaching Tips
- • Remember: K = °C + 273.15 (simple addition)
- • Kelvin has the same size degree as Celsius
- • 0 K = absolute zero (no molecular motion)
- • Room temperature ≈ 293 K (20°C)
- • Water freezes at 273.15 K and boils at 373.15 K
⚠️ Common Mistakes to Avoid
- • Never use degree symbol with Kelvin (it's K, not °K)
- • Kelvin can never be negative
- • Don't confuse with Fahrenheit conversion formulas
- • Remember to use Kelvin in gas law calculations
- • Be precise: use 273.15, not just 273
About this calculator
Convert between Kelvin, Celsius, and Fahrenheit. Essential for physics and chemistry calculations with absolute temperature.
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