Temperature Conversion Calculator
Convert between Fahrenheit, Celsius, Kelvin, and Rankine
Temperature Conversion Calculator
Convert between Fahrenheit, Celsius, Kelvin, and Rankine temperature scales instantly. Enter a value in any field and all other conversions will be calculated automatically.
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🌡️ Temperature Converter
Enter a value in any field to convert to all other temperature scales:
📊 Conversion Result
📐 Conversion Steps
212 °F → Celsius: (212 − 32) × 5/9 = 100 °C
100 °C → Kelvin: 100 + 273.15 = 373.15 K
212 °F → Rankine: 212 + 459.67 = 671.67 °R
📋 Common Temperature Reference Points
| Reference Point | °F | °C | K | °R |
|---|---|---|---|---|
| 🥶 Absolute Zero | −459.67 | −273.15 | 0 | 0 |
| ❄️ Freezing Point of Water | 32 | 0 | 273.15 | 491.67 |
| 🏠 Room Temperature | 68 | 20 | 293.15 | 527.67 |
| 🌡️ Normal Body Temperature | 98.6 | 37 | 310.15 | 558.27 |
| ♨️ Boiling Point of Water | 212 | 100 | 373.15 | 671.67 |
| 🍳 Baking Temperature | 350 | 176.67 | 449.82 | 809.67 |
| ☀️ Surface of the Sun | 9,941 | 5,505 | 5,778 | 10,400 |
📐 Temperature Conversion Formulas
From Fahrenheit (°F)
°C = (°F − 32) × 5/9
K = (°F − 32) × 5/9 + 273.15
°R = °F + 459.67
From Celsius (°C)
°F = °C × 9/5 + 32
K = °C + 273.15
°R = (°C + 273.15) × 9/5
From Kelvin (K)
°C = K − 273.15
°F = (K − 273.15) × 9/5 + 32
°R = K × 9/5
From Rankine (°R)
°F = °R − 459.67
°C = (°R − 491.67) × 5/9
K = °R × 5/9
📚 Understanding Temperature Scales
Fahrenheit (°F)
The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in 1724. It sets the freezing point of water at 32°F and the boiling point at 212°F, placing exactly 180 degrees between the two reference points. It is primarily used in the United States and a few other countries for everyday temperature measurements, weather forecasts, and cooking.
Celsius (°C)
The Celsius scale (formerly centigrade) was developed by Anders Celsius in 1742. It defines the freezing point of water at 0°C and the boiling point at 100°C at standard atmospheric pressure. Celsius is used by most countries worldwide and is the standard in scientific contexts alongside Kelvin.
Kelvin (K)
The Kelvin scale is the SI base unit of temperature and is an absolute thermodynamic scale. It starts at absolute zero (0 K = −273.15°C), the theoretical point where all molecular motion ceases. Each increment of Kelvin is the same size as one degree Celsius. Kelvin is widely used in scientific research, physics, and astronomy. Note that Kelvin does not use the degree symbol (°).
Rankine (°R)
The Rankine scale was proposed by William John Macquorn Rankine in 1859. Like Kelvin, it is an absolute scale starting at absolute zero, but it uses Fahrenheit-sized degrees instead of Celsius-sized degrees. It is primarily used in thermodynamic engineering calculations in the United States, particularly in heating, ventilation, and air conditioning (HVAC) applications.