Reviewed by Franz Jerby Delos Santos
What is 21 degrees Celsius in Fahrenheit?
Answer: 21 degrees Celsius in Fahrenheit is 69.8
Converting temperatures between Celsius and Fahrenheit is a common task in science, travel, and daily life. The Celsius scale is widely used internationally, while Fahrenheit is standard in the United States. Understanding how to convert between these two units can help in interpreting weather forecasts and scientific data.
Methods
Math Tutor Explanation Using the Standard Conversion Formula
The most direct way to convert Celsius to Fahrenheit is by applying the standard conversion formula.
Step 1: Step 1: Multiply the Celsius temperature by 9/5
Step 2: Step 2: Add 32 to the result from Step 1
Math Tutor Explanation Using Quick Estimation
For a quick estimate, you can double the Celsius temperature and add about 30, though this gives a rough answer.
Step 1: Step 1: Double the Celsius value (21 × 2 = 42)
Step 2: Step 2: Add 30 to the result (42 + 30 = 72, which is close to the exact value)
Step 1:
Step 2:
Math Tutor suggests: More Temperature Conversion Practice
Looking to strengthen your skills in converting between Celsius and Fahrenheit? Here are some related temperature conversion questions for more practice.
FAQ on Celsius and Fahrenheit Conversion
What is the formula to convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 and then add 32.
Why do some countries use Fahrenheit and others use Celsius?
It depends on historical adoption and national standards; the US commonly uses Fahrenheit, while most other countries use Celsius.
What is 0 degrees Celsius in Fahrenheit?
0 degrees Celsius is 32 degrees Fahrenheit.
Is Fahrenheit or Celsius better for scientific work?
Celsius is preferred in science because it is part of the metric system and aligns with the Kelvin scale.
How do you convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit temperature and then multiply by 5/9.
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