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此计算器目前以英文显示，翻译正在准备中。

数学

已验证计算器，公式透明

数学

Fahrenheit to Celsius Calculator.

Converts a temperature from Fahrenheit to Celsius and also shows the Kelvin equivalent.

结果随输入实时更新。
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您的输入

工作原理

  1. 1

    Subtract 32 from the Fahrenheit value.

  2. 2

    Multiply the result by 5.

  3. 3

    Divide by 9 to get Celsius.

  4. 4

    For Kelvin, add 273.15 to the Celsius result.

(fahrenheit - 32) * 5 / 9

常见问题

What is the formula to convert Fahrenheit to Celsius?

Subtract 32 from the Fahrenheit temperature, then multiply by 5/9. For example, 68°F becomes (68-32)*5/9 = 20°C.

Why is -40 the same in both scales?

Because the conversion formula yields -40 when you plug in -40: (-40-32)*5/9 = -40. The scales intersect at that point.

How do I convert Celsius back to Fahrenheit?

Multiply the Celsius temperature by 9/5 and add 32. For instance, 20°C becomes 20*9/5+32 = 68°F.

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结果

公式已检查

Celsius

37°C

Kelvin310.15K
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工作原理

Converts a temperature from Fahrenheit to Celsius and also shows the Kelvin equivalent.

  1. Subtract 32 from the Fahrenheit value.
  2. Multiply the result by 5.
  3. Divide by 9 to get Celsius.
  4. For Kelvin, add 273.15 to the Celsius result.

公式

此计算器背后的数学公式，供您核对结果。

Fahrenheit to Celsius

°C = (°F - 32) × 5/9

This linear conversion adjusts for the different zero points and scale sizes of the two temperature scales.

Example:

Input: °F = 77

Calculation: (77 - 32) × 5/9

Result: 25°C

Fahrenheit to Kelvin

K = (°F - 32) × 5/9 + 273.15

Kelvin is an absolute temperature scale, so you first convert to Celsius and then add 273.15.

Example:

Input: °F = 32

Calculation: (32 - 32) × 5/9 + 273.15

Result: 273.15 K

实际应用场景

此计算在日常生活中的应用。

Cooking and Baking

Many recipes use Fahrenheit, but ovens in other countries are marked in Celsius. Convert to set the right temperature.

Example: 350°F becomes 176.67°C.

Weather and Travel

When traveling to a country that uses Celsius, quickly understand the local temperature in familiar terms.

Example: A forecast of 86°F is 30°C.

Science and Education

Students and professionals often need to convert temperatures for experiments or data analysis.

Example: Body temperature 98.6°F is 37°C.

提示与常见错误

Tips

  • Remember the freezing point of water: 32°F = 0°C.
  • A quick mental estimate: subtract 30 and halve the result for a rough Celsius value.
  • For precise conversions, always use the exact formula with 5/9.
  • Check your result: 100°C (boiling) should be 212°F.

Common Mistakes to Avoid

  • Forgetting to subtract 32 before multiplying.
  • Using 9/5 instead of 5/9 when converting to Celsius.
  • Rounding too early in multi-step calculations.

假设与限制

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.