Converting temperatures between Celsius and Fahrenheit is a fundamental skill in various scientific and practical applications. This article will provide you with a comprehensive understanding of the conversion process, common mistakes to avoid, and a step-by-step approach to ensure accurate conversions.
The Celsius scale (°C) is commonly used in most countries around the world, except for the United States. It is defined based on the freezing (0°C) and boiling (100°C) points of water at sea level.
The Fahrenheit scale (°F) is primarily used in the United States and a few other countries. It is defined based on the freezing (32°F) and boiling (212°F) points of water at sea level.
To convert a temperature in Celsius to Fahrenheit, use the following formula:
°F = (°C × 9/5) + 32
To convert a temperature in Fahrenheit to Celsius, use the following formula:
°C = (°F - 32) × 5/9
From Celsius to Fahrenheit:
Example: Convert 25°C to Fahrenheit:
°F = (25 × 9/5) + 32 = 77°F
From Fahrenheit to Celsius:
Example: Convert 68°F to Celsius:
°C = (68 - 32) × 5/9 = 20°C
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Why is the zero point on the Celsius scale chosen as the freezing point of water?
- The freezing point of water is a natural reference point that is easy to measure and observe.
Why is the Fahrenheit scale used in the United States?
- The Fahrenheit scale was invented by Daniel Fahrenheit in 1724, and it became widely adopted in the United States during the colonial period.
Which scale is more accurate for scientific purposes?
- The Celsius scale is more accurate for scientific purposes because it uses a smaller temperature interval (100°C) than the Fahrenheit scale (180°F).
How do I convert temperatures below zero?
- Use the same formulas as above, but include the negative sign. For example, to convert -20°C to Fahrenheit:
°F = (-20 × 9/5) + 32 = -4°F
What is the freezing point of water in Kelvin?
- 273.15 K
What is the boiling point of water in Rankine?
- 671.67 °R
°C | °F |
---|---|
0 | 32 |
10 | 50 |
20 | 68 |
30 | 86 |
40 | 104 |
50 | 122 |
60 | 140 |
70 | 158 |
80 | 176 |
90 | 194 |
100 | 212 |
°F | °C |
---|---|
32 | 0 |
50 | 10 |
68 | 20 |
86 | 30 |
104 | 40 |
122 | 50 |
140 | 60 |
158 | 70 |
176 | 80 |
194 | 90 |
212 | 100 |
Scale | Conversion Factor from °C | Conversion Factor from °F |
---|---|---|
Fahrenheit (°F) | 9/5 | 5/9 |
Kelvin (K) | 273.15 + °C | °F + 459.67 |
Rankine (°R) | °F + 459.67 | °C × 9/5 + 491.67 |
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