Temperature Converter
Quick answer: Choose a starting unit and a target unit, then enter a value. Common conversions: 1 °C = 33.8 °F; 1 °C = 274.15 K; 1 °C = 493.47 °R. This converter covers 5 temperature units.
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- Step by step
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- Method
Use the Temperature Converter
Temperature formula and what each symbol means
Convert the value to K with the unit rule in the table, then convert from K to the target unit.
| Symbol | Meaning |
|---|---|
| value | The number you want to convert |
| factor | The unit’s size expressed in the base unit (K) |
Temperature examples
°C to °F
37 °C = 98.6 °F.
°C to K
37 °C = 310.15 K.
°C to °R
37 °C = 558.27 °R.
How to calculate Temperature step by step
- Choose the starting unit and the target unit.
- Enter your value.
- Read the converted value; the tool applies each unit’s scale and offset through the base unit.
Popular temperature conversions
- Celsius to Fahrenheit converter
- Celsius to Kelvin converter
- Celsius to Rankine converter
- Fahrenheit to Celsius converter
- Fahrenheit to Kelvin converter
- Fahrenheit to Rankine converter
- Kelvin to Celsius converter
- Kelvin to Fahrenheit converter
- Kelvin to Rankine converter
- Rankine to Celsius converter
- Rankine to Fahrenheit converter
- Rankine to Kelvin converter
How to read your Temperature result
Temperature scales have different zero points, so conversions use a multiply-and-add formula, not one factor alone. Water freezes at 0 °C, 32 °F and 273.15 K, and boils at 100 °C, 212 °F and 373.15 K at standard pressure.
| UNIT | SYMBOL | EQUALS | VALUE OF 1 °C |
|---|---|---|---|
| Kelvin | K | K = K × 1 | 274.15 K |
| Degree Celsius | °C | K = °C × 1 + 273.15 | 1 °C |
| Degree Fahrenheit | °F | K = °F × 0.55555556 + 255.37222 | 33.8 °F |
| Degree Rankine | °R | K = °R × 0.55555556 | 493.47 °R |
| Degree Réaumur | °Ré | K = °Ré × 1.25 + 273.15 | 0.8 °Ré |
Common mistakes when calculating Temperature
- Multiplying by 1.8 but forgetting to add 32 when converting Celsius to Fahrenheit.
- Converting a temperature difference with the same formula: for differences only the scale factor applies, with no offset.
- Using 273 instead of 273.15 when you need accurate kelvin values.
Temperature FAQ
What is the formula to convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 (1.8) and add 32.
What is the formula to convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit value and multiply by 5/9.
What is absolute zero?
Absolute zero is 0 K, which equals -273.15 °C or about -459.67 °F.
What is the base unit for temperature?
This converter uses kelvin (K) as the common base unit: every value is first converted to it and then to the target unit.
How do I convert between two temperature units?
These units do not share a simple multiplier, so each conversion goes through the base unit using the formula shown in the table.
How many Fahrenheit are in 1 Degree Celsius?
1 °C = 33.8 °F.
How many Kelvin are in 1 Degree Celsius?
1 °C = 274.15 K.
How many Rankine are in 1 Degree Celsius?
1 °C = 493.47 °R.
Which temperature units does this converter support?
It covers 5 units: Kelvin (K), Degree Celsius (°C), Degree Fahrenheit (°F), Degree Rankine (°R), Degree Réaumur (°Ré).
How accurate is the temperature converter?
Results are calculated at full double precision and shown to about 8 significant figures. Round the answer to the precision of your original measurement; a result cannot be more accurate than the number you started with.
More in Temperature converters
- Rankine to Kelvin Converter
- Rankine to Fahrenheit Converter
- Rankine to Celsius Converter
- Fahrenheit to Celsius Converter
- Kelvin to Rankine Converter
- Fahrenheit to Kelvin Converter
See all temperature converters tools · All Conversion calculators · Site map
Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the kelvin