liminfoTemperature Converter
Free web tool: Temperature Converter
Conversion Result
32 Fahrenheit
Celsius (°C)
0
Fahrenheit (°F)
32
Kelvin (K)
273.15
Rankine (°R)
491.67
Reference Temperatures
About Temperature Converter
The Temperature Converter converts any temperature value between the four major temperature scales: Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R). Enter a value, select your source unit, and see the equivalent in all other units displayed simultaneously in real time. A swap button lets you instantly reverse the from/to direction without retyping.
This tool is widely used in science, engineering, cooking, and everyday life. Scientists and engineers use Kelvin for thermodynamics and absolute temperature references. Fahrenheit is standard in the United States for weather and cooking. Celsius is used in most of the world for daily temperatures. Rankine is used in some US engineering contexts, particularly in thermodynamic calculations involving the English unit system.
All conversions route through Celsius as the intermediate unit: the input is first converted to Celsius, then the Celsius value is converted to all target units. The Celsius-to-Fahrenheit formula is °F = °C × 9/5 + 32; Celsius-to-Kelvin is K = °C + 273.15; Celsius-to-Rankine is °R = (°C + 273.15) × 9/5. Reference temperatures displayed include water freezing point (0°C), boiling point (100°C), human body temperature (36.5°C), and absolute zero (−273.15°C).
Key Features
- Converts between Celsius, Fahrenheit, Kelvin, and Rankine simultaneously
- Real-time conversion — all four results update instantly as you type
- Swap button to instantly reverse the from/to unit pair
- Dedicated main result display showing the primary conversion result prominently
- All-units grid showing conversions to every scale at once
- Reference temperature panel for water freeze/boil, body temperature, and absolute zero
- Precise results rounded to four decimal places
- 100% client-side processing with no data sent to any server
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 (or 1.8) then add 32. For example, 100°C × 1.8 + 32 = 212°F. In this converter, select Celsius as the "From" unit, enter 100, and select Fahrenheit as the "To" unit to get 212°F instantly.
What is absolute zero in Celsius, Fahrenheit, and Kelvin?
Absolute zero is the lowest theoretically possible temperature, at which all molecular motion stops. It is −273.15°C, −459.67°F, 0 K (by definition), and 0 °R (Rankine also starts at absolute zero). This temperature cannot be reached in practice but is used as the zero reference for Kelvin and Rankine scales.
What is the difference between Kelvin and Celsius?
Kelvin and Celsius use the same degree size — a 1 K change equals a 1°C change. The only difference is where the zero point is. Celsius sets zero at the freezing point of water. Kelvin sets zero at absolute zero (−273.15°C). So K = °C + 273.15.
What is Rankine and when is it used?
Rankine is an absolute temperature scale (starting at absolute zero) that uses Fahrenheit-sized degrees. It is used in some US engineering calculations, particularly in thermodynamics involving the English unit system (BTU, pound-force, etc.). The conversion is °R = (°C + 273.15) × 9/5, or equivalently °R = °F + 459.67.
What is normal human body temperature?
Normal oral body temperature is approximately 37°C (98.6°F, 310.15 K). However, normal temperature varies by individual, measurement site, and time of day. The reference value of 36.5°C shown in this tool represents a typical healthy resting temperature.
What is the boiling point of water in Fahrenheit and Kelvin?
Water boils at 100°C at standard atmospheric pressure (1 atm = 101.325 kPa). This equals 212°F, 373.15 K, and 671.67 °R. At higher altitudes where atmospheric pressure is lower, water boils at a lower temperature.
How do I convert negative Celsius to Fahrenheit?
The formula works the same way for negative values: °F = °C × 9/5 + 32. For example, −40°C = (−40 × 1.8) + 32 = −72 + 32 = −40°F. Interestingly, −40°C and −40°F are the same temperature — the only point where the two scales intersect.
Why does the converter show results to four decimal places?
Four decimal places provides enough precision for most scientific and engineering purposes while keeping the display readable. For very high-precision work (such as metrology or cryogenics), you may need more decimal places than a general-purpose converter provides.