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卵のゆで時間計算機

半熟、中程度、固ゆで卵に適したゆで時間を標高補正付きで算出します。

はじめに

Boiling Time Calculator — Find the right boil time for soft, medium, or hard-boiled eggs, adjusted for altitude. Enter Egg doneness, Altitude (m) to get an instant, accurate result.

計算式

Uses standard sea-level reference times for egg boiling (soft 6 min, medium 9 min, hard 12 min), then adds a rule-of-thumb altitude adjustment of +5% time per 1000m of elevation, reflecting that water boils at a lower temperature at higher altitude and so cooks food more slowly.

ステップごとの説明

  1. Enter the Egg doneness.
  2. Enter the Altitude (m).
  3. Click Calculate to see your result instantly.

実例

Example: With Egg doneness = medium, Altitude (m) = 0, the Boiling Time Calculator gives Base Minutes: 9, Adjusted Minutes: 9.

よくある質問

Why does altitude matter for boiling eggs?
Water boils at a lower temperature as elevation increases (atmospheric pressure drops), so food in boiling water cooks slightly slower at altitude — the +5%-per-1000m adjustment is a commonly-cited home-cooking approximation for this effect, not an exact physical calculation.
Are these times measured from when the water starts boiling?
Yes, the reference times assume the egg goes into already-boiling water and the timer starts at that point.
What inputs does the Boiling Time Calculator need?
You'll need to provide: Egg doneness, Altitude (m). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Boiling Time Calculator?
The Boiling Time Calculator applies the formula exactly as calculated — Uses standard sea-level reference times for egg boiling (soft 6 min, medium 9 min, hard 12 min), then adds a rule-of-thumb altitude adjustment of +5% time per 1000m of elevation, reflecting that water boils at a lower temperature at higher altitude and so cooks food more slowly. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Boiling Time Calculator free to use?
Yes, the Boiling Time Calculator is completely free, requires no signup, and runs instantly in your browser.

卵のゆで時間計算機について

The Boiling Time Calculator uses a real, verifiable formula — Uses standard sea-level reference times for egg boiling (soft 6 min, medium 9 min, hard 12 min), then adds a rule-of-thumb altitude adjustment of +5% time per 1000m of elevation, reflecting that water boils at a lower temperature at higher altitude and so cooks food more slowly. — so results are accurate every time, not an approximation.