25 °C = 298.15 K
| Unit | Value |
|---|---|
| kelvin (K) | 298.15 |
| degrees Celsius (°C) | 25 |
| degrees Fahrenheit (°F) | 77 |
| degrees Rankine (°R) | 536.67 |
Temperature scales have different zero points, so they convert with an offset: K = °C + 273.15 and °F = °C × 9/5 + 32. For a temperature change, 1 °C = 1 K = 1.8 °F.
How it works
Every unit is defined by an exact factor to its SI base unit (kilogram, cubic metre, metre, kelvin, pascal, joule, mole, second), so any unit converts to any other through the base unit. Temperature scales also have an offset, because their zero points differ: K = °C + 273.15 and °F = °C × 9/5 + 32.
Exact definitions are used where they exist: the inch (2.54 cm), the pound (0.45359237 kg), the thermochemical calorie (4.184 J), the standard atmosphere (101,325 Pa), the torr (1/760 atm) and the electronvolt. Gallons and fluid ounces are US customary units.
Frequently asked questions
- How do I convert °C to K?
- Add 273.15. Room temperature, 25 °C, is 298.15 K. A change of 1 °C is the same as a change of 1 K.
- How many kPa are in 1 atm?
- Exactly 101.325 kPa. One atmosphere is also 760 torr, 1.01325 bar and about 14.696 psi.
- How do I convert eV to kJ/mol?
- Multiply by 96.485. One electronvolt per particle corresponds to 96.485 kJ per mole of particles.
- What is the difference between mmHg and torr?
- They are almost identical: 1 torr is exactly 1/760 atm, while the conventional millimetre of mercury is 133.322387 Pa — about 0.14 parts per million larger.
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