15 degrees Celsius is equal to 59 degrees Fahrenheit.
To convert 15 Celsius to Fahrenheit, you use the formula that multiplies the Celsius temperature by 9/5 and then adds 32. This converts the temperature to the Fahrenheit scale, which is commonly used in the United States.
Conversion Tool
Result in fahrenheit:
Conversion Formula
The formula to convert Celsius to Fahrenheit is: F = (C × 9/5) + 32. This means you multiply the Celsius temperature by 9 divided by 5, then add 32 to that product. The reason behind this formula is because the Fahrenheit scale has different zero points and degree sizes than Celsius.
The Celsius scale sets 0° at water freezing and 100° at boiling, while Fahrenheit sets 32° at freezing and 212° at boiling. Multiplying by 9/5 adjusts the size of the degree unit, and adding 32 shifts the scale to match the Fahrenheit zero point.
For example, to convert 15°C:
- Multiply 15 by 9/5: 15 × 9/5 = 27
- Add 32: 27 + 32 = 59
- So, 15°C is 59°F
Conversion Example
- Convert 20°C to Fahrenheit:
- Multiply 20 by 9/5: 20 × 9/5 = 36
- Add 32: 36 + 32 = 68
- Result: 20°C = 68°F
- Convert 0°C to Fahrenheit:
- Multiply 0 by 9/5: 0 × 9/5 = 0
- Add 32: 0 + 32 = 32
- Result: 0°C = 32°F
- Convert -5°C to Fahrenheit:
- Multiply -5 by 9/5: -5 × 9/5 = -9
- Add 32: -9 + 32 = 23
- Result: -5°C = 23°F
- Convert 30°C to Fahrenheit:
- Multiply 30 by 9/5: 30 × 9/5 = 54
- Add 32: 54 + 32 = 86
- Result: 30°C = 86°F
Conversion Chart
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -10.0 | 14.0 |
| -5.0 | 23.0 |
| 0.0 | 32.0 |
| 5.0 | 41.0 |
| 10.0 | 50.0 |
| 15.0 | 59.0 |
| 20.0 | 68.0 |
| 25.0 | 77.0 |
| 30.0 | 86.0 |
| 35.0 | 95.0 |
| 40.0 | 104.0 |
Use this chart by finding the Celsius value you want to convert, then read across to the Fahrenheit column. The values show the equivalent Fahrenheit temperature for each Celsius number, helping you quickly compare or convert without calculation.
Related Conversion Questions
- What is 15 degrees Celsius in Fahrenheit exactly?
- How do I convert 15 Celsius to Fahrenheit step by step?
- Is 15°C warmer or cooler than 59°F?
- What’s the Fahrenheit equivalent of 15°C outdoor temperature?
- How does changing 15 Celsius affect Fahrenheit scale reading?
- Why does 15 Celsius equal 59 Fahrenheit and not another number?
- Can I quickly estimate 15 Celsius in Fahrenheit without a calculator?
Conversion Definitions
Celsius: Celsius is a temperature scale where 0 degrees marks the freezing point of water and 100 degrees marks the boiling point at sea level. It divides this range into 100 equal parts called degrees, widely used in science and everyday life outside the US.
Fahrenheit: Fahrenheit is a temperature scale mostly used in the United States, where 32 degrees marks the freezing point of water and 212 degrees marks boiling at sea level. Degrees are smaller than Celsius, making the scale more granular between points.
Conversion FAQs
Why does the formula add 32 when converting Celsius to Fahrenheit?
The 32 added in the formula shifts the zero point from Celsius to Fahrenheit scale. Since water freezes at 0°C but at 32°F, adding 32 compensates for this offset, making sure both scales align correctly for corresponding temperatures.
Can I convert Fahrenheit back to Celsius using a similar formula?
Yes, converting Fahrenheit to Celsius requires reversing the process: subtract 32 from the Fahrenheit value, then multiply by 5/9. This undoes the scaling and shifting applied when converting Celsius to Fahrenheit.
Is the conversion formula valid for all temperature values?
The formula works for any temperature value, including negatives and decimals. Both Celsius and Fahrenheit scales are linear, so the relationship holds true regardless of temperature magnitude.
Why do some countries use Celsius while others use Fahrenheit?
The choice of temperature scale often depends on historical and regional preferences. Most countries adopted Celsius due to its simplicity and metric system alignment, while the US continues using Fahrenheit for daily weather and cooking.
Does the formula apply to temperature scales like Kelvin?
No, Kelvin uses an absolute zero point and a different scale size. Converting between Celsius and Kelvin involves adding or subtracting 273.15, but converting to Fahrenheit requires first converting to Celsius or using a separate formula.