Validated absolute-temperature conversion
Hőmérséklet-átalakító
Convert an absolute temperature between degrees Celsius, degrees Fahrenheit, kelvins and degrees Rankine. Inputs below absolute zero are rejected instead of being reported as physical temperatures.
Strict absolute-zero limitDecimal point or commaNo hidden state
Absolute temperature only. Do not use this offset conversion for a temperature difference or interval. For intervals, 1 °C has the same magnitude as 1 K, while 1 °F and 1 °R each have the magnitude 5/9 K.
Equivalent absolute temperatures
Celsius temperature
Fahrenheit temperature
Thermodynamic temperature
Rankine temperature
Method, formulas and boundaries
Canonical thermodynamic temperature T in K:
from °C: T/K = t/°C + 273.15
from °F: T/K = (t/°F + 459.67) × 5/9
from °R: T/K = (T/°R) × 5/9
from °C: T/K = t/°C + 273.15
from °F: T/K = (t/°F + 459.67) × 5/9
from °R: T/K = (T/°R) × 5/9
Outputs:
t/°C = T/K − 273.15
t/°F = (T/K) × 9/5 − 459.67
T/°R = (T/K) × 9/5
Accepted
- Absolute temperatures at or above 0 K.
- Point or comma decimal marker.
- Normalized T no greater than 1012 K.
Rejected
- Any value below absolute zero.
- Exponent,grouping or unit suffix.
- Temperature intervals/differences.
Precíziós
- Up to 12 significant digits displayed.
- No claim beyond source measurement uncertainty.
- Conversion does not calibrate a sensor.
Reference checks. Absolute zero is 0 K = −273.15 °C = −459.67 °F = 0 °R. The Celsius and Fahrenheit numerical values are equal at −40. Water phase-transition temperatures are intentionally not used as unconditional reference points because they depend on stated conditions and realization.
Források
- BIPM, The International System of Units (SI Brochure), 9th edition,version 4.01,June 2026, page 129: defines the kelvin and the relation t/°C = T/K − 273.15; it also distinguishes absolute temperatures from temperature differences.
- NIST Special Publication 811, Appendix B.8: gives the Celsius/Kelvin,Fahrenheit/Celsius,Fahrenheit/Kelvin and Rankine/Kelvin conversion equations and interval factors.
- NIST, Kelvin: Thermodynamic Temperature: describes thermodynamic temperature as a number of kelvins above absolute zero,the theoretical lower bound.
Osztályozás: these are published unit-conversion relations,not empirical recommendations or an ISO calculator. Results remain limited by the original measurement,scale realization and uncertainty.
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