温度 変換ツール
摂氏・華氏・ケルビン相互変換
Required Parameters
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Quick Answer
°F = (°C × 9/5) + 32. °C = (°F - 32) × 5/9. K = °C + 273.15. The scales cross at -40° (where °C = °F). Water freezes at 0°C / 32°F / 273.15K and boils at 100°C / 212°F / 373.15K.
Design Notes
Electronics datasheets use Celsius exclusively. Standard operating ranges: commercial (0-70°C), industrial (-40 to 85°C), automotive (-40 to 125°C). Junction temperature is the most critical thermal parameter for IC reliability.
Common Mistakes
- 1
Forgetting the offset in Celsius-Fahrenheit conversion — it is NOT a simple multiplication.
- 2
Using ° symbol with Kelvin — correct notation is simply K, not °K.
- 3
Confusing temperature difference with absolute temperature — a 10°C rise = 18°F rise, but 10°C = 50°F.
Knowledge Base
摂氏→華氏の変換は?
°F = (°C × 9/5) + 32。例:100°C = 212°F。暗算:摂氏を2倍して30を足す。
華氏→摂氏の変換は?
°C = (°F - 32) × 5/9。例:72°F = 22.2°C。
華氏と摂氏が同じになる温度は?
-40°。唯一の交点:-40°C = -40°F。
電子工学で使う温度スケールは?
摂氏(°C)。標準範囲:民生用(0〜70°C)、産業用(-40〜85°C)、車載用(-40〜125°C)。
0ケルビンとは?
絶対零度:-273.15°C。物理的に到達不可能な最低温度。原子の熱運動が最小に。