Convert Planck Temperature to Celsius
Convert planck temperatures to degrees celsius instantly. °C = (T_P × 1.416784e+32) − 273.15 — use the live calculator, the exact formula, a reference-temperature table and worked examples. Also check the Celsius to Planck Temperature converter for the reverse conversion.
Units explained
Planck Temperature
The Planck temperature (T_P) is the natural unit of temperature, about 1.416784×10³² kelvins, constructed purely from the fundamental constants ħ, c, G, and k. It is widely regarded as the highest temperature at which known physics remains meaningful.
Arises from Max Planck's 1899 system of natural units, which combines the speed of light, the gravitational constant, the reduced Planck constant, and the Boltzmann constant into universal base quantities independent of any human artifact.
Cosmology and quantum-gravity research, where it marks the temperature of the universe roughly one Planck time after the Big Bang. No laboratory process approaches even a trillionth of a trillionth of it.
Defined within Max Planck's natural-unit system proposed in Germany in 1899; the modern recommended value (1.416784×10³² K) is maintained by the CODATA fundamental-constants adjustment.
Celsius
The degree Celsius (°C) is the SI's everyday temperature unit. One degree Celsius is exactly the same size as one kelvin, with the zero point shifted so that 0 °C = 273.15 K. Water freezes near 0 °C and boils near 100 °C at standard atmospheric pressure.
Named for Swedish astronomer Anders Celsius, who in 1742 proposed a 100-degree scale between the boiling and freezing points of water. His original scale ran in reverse (0 at boiling, 100 at freezing); it was inverted to the modern direction shortly after his death.
The world's standard everyday temperature scale, used in nearly every country — including throughout India — for weather forecasts, cooking, medicine, science classrooms, and industry.
Devised by Anders Celsius at Uppsala University, Sweden, in 1742; the inverted modern form was in use by 1745, and the name 'degree Celsius' replaced 'degree centigrade' internationally at the 9th CGPM in 1948.
Planck Temperature to Celsius conversion formula
Note: this conversion uses the CODATA recommended value of the Planck temperature (1.416784×10³² K), which carries a small experimental uncertainty from the gravitational constant G.
The exact relationship between planck temperatures and degrees celsius:
To convert planck temperatures to degrees celsius, multiply the value by 1.416784e+32, then subtract 273.15. To reverse, add 273.15 to the value, then multiply by 7.058239e-33.
Reference anchors: water freezes at 1.927958e-30 T_P = 0 °C and boils at 2.633782e-30 T_P = 100 °C (at standard atmospheric pressure).
How to use this converter
Type a value into the calculator. The result in degrees celsius updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Celsius to Planck Temperature converter for the reverse direction.
Step-by-step: convert planck temperatures to degrees celsius
- Write down the temperature in planck temperatures (T_P).
- Multiply the value by 1.416784e+32, then subtract 273.15.
- The result is the same temperature expressed in degrees celsius (°C).
- To reverse, add 273.15 to the value, then multiply by 7.058239e-33 — or open the Celsius to Planck Temperature converter.
Worked examples
Example 1 — Convert 1 T_P to °C:
(1 × 1.416784e+32) − 273.15 = 1.416784e+32 °C
Example 2 — Convert 100 T_P to °C:
(100 × 1.416784e+32) − 273.15 = 1.416784e+34 °C
Planck Temperature to Celsius conversion table
Physically meaningful reference temperatures, from absolute zero to the surface of the Sun, converted from planck temperatures to degrees celsius:
| Planck Temperature [T_P] | Celsius [°C] | Reference point |
|---|---|---|
| 0 | -273.15 | Absolute zero |
| 1.645628e-30 | -40 | Where Celsius and Fahrenheit coincide (−40°) |
| 1.802478e-30 | -17.7777777778 | Zero Fahrenheit (0 °F) |
| 1.927958e-30 | 0 | Water freezes (0 °C / 32 °F) |
| 1.928029e-30 | 0.01 | Triple point of water |
| 1.99854e-30 | 10 | Cool day (10 °C / 50 °F) |
| 2.069123e-30 | 20 | Room temperature (20 °C / 68 °F) |
| 2.104414e-30 | 25 | Standard laboratory temperature (25 °C) |
| 2.139705e-30 | 30 | Hot day (30 °C / 86 °F) |
| 2.189113e-30 | 37 | Human body temperature (37 °C / 98.6 °F) |
| 2.210288e-30 | 40 | Heat-wave day (40 °C / 104 °F) |
| 2.28087e-30 | 50 | Hot tap water (50 °C / 122 °F) |
| 2.633782e-30 | 100 | Water boils (100 °C / 212 °F) |
| 3.198441e-30 | 180 | Moderate baking oven (180 °C / 356 °F) |
| 4.07825e-29 | 5504.85 | Surface of the Sun (≈5,505 °C) |
Frequently asked questions
What is 1 T_P in °C?
How do I convert planck temperatures to degrees celsius?
How do I convert degrees celsius back to planck temperatures?
At what temperature do the Planck Temperature and Celsius scales read the same number?
Can a temperature be below absolute zero?
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Sources & references
Conversion relationship (°C = (T_P × 1.416784e+32) − 273.15) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- BIPM — International Temperature Scale of 1990 (ITS-90)
The internationally agreed practical temperature scale, defining fixed points (including the triple point of water at 273.16 K) and interpolation instruments used by national metrology institutes for thermometer calibration worldwide.
- CODATA Internationally Recommended Values of the Fundamental Physical Constants
Committee on Data of the International Science Council; authoritative source for the masses of fundamental particles (electron, proton, neutron) and the atomic mass constant.