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時間・期間 換算器
秒、分、時間、日、週、月、年、マイクロ秒を換算。
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基準と換算係数
時間・期間 基準と換算係数
基準単位： 秒 (s) (s)
| 単位名 | 記号 | 分類 | 換算値（ 秒 (s) | 説明 |
|---|---|---|---|---|
| ナノ秒 | ns | 🔹 Standard Units (SI & Everyday) | 1 ns = 1.0000e-9 s | 1 nanosecond = 10⁻⁹ seconds |
| マイクロ秒 | µs | 🔹 Standard Units (SI & Everyday) | 1 µs = 0.000001 s | 1 microsecond = 10⁻⁶ seconds |
| ミリ秒 | ms | 🔹 Standard Units (SI & Everyday) | 1 ms = 0.001 s | 1 millisecond = 10⁻³ seconds = 1,000 µs |
| 秒 (s) | s | 🔹 Standard Units (SI & Everyday) | 1 s = 1 s | SI base unit of time (defined by Caesium-133 resonance) |
| 分 (min) | min | 🔹 Standard Units (SI & Everyday) | 1 min = 60 s | 1 minute = 60 seconds |
| 時間 (h) | h | 🔹 Standard Units (SI & Everyday) | 1 h = 3,600 s | 1 hour = 60 minutes = 3,600 seconds |
| 日 (日) | d | 🔹 Standard Units (SI & Everyday) | 1 d = 86,400 s | 1 standard day = 24 hours = 86,400 seconds |
| 週 | wk | 🔹 Standard Units (SI & Everyday) | 1 wk = 604,800 s | 1 week = 7 days = 168 hours = 604,800 seconds |
| フォートナイト (2週間) | fn | 🔹 Standard Units (SI & Everyday) | 1 fn = 1,209,600 s | 1 fortnight = 14 days = 2 weeks = 1,209,600 seconds |
| 年 (グレゴリオ暦) | yr (avg) | 📅 Calendar & Astronomy | 1 yr (avg) = 31,556,952 s | Average Gregorian calendar year = 365.2425 days = 31,556,952 s |
| 平年 (365日) | yr (365d) | 📅 Calendar & Astronomy | 1 yr (365d) = 31,536,000 s | Standard non-leap year = 365 days = 31,536,000 s |
| 閏年 (366日) | yr (leap) | 📅 Calendar & Astronomy | 1 yr (leap) = 31,622,400 s | Leap year with 29 Feb = 366 days = 31,622,400 s |
| ユリウス年 | yr (jul) | 📅 Calendar & Astronomy | 1 yr (jul) = 31,557,600 s | Scientific astronomical Julian year = exactly 365.25 days = 31,557,600 s |
| 月 (グレゴリオ暦平均) | mo (avg) | 📅 Calendar & Astronomy | 1 mo (avg) = 2,629,746 s | 1/12th of a Gregorian year ≈ 30.436875 days ≈ 2,629,746 s |
| 月 (商用30日) | mo (30d) | 📅 Calendar & Astronomy | 1 mo (30d) = 2,592,000 s | Standard commercial month = exactly 30 days = 2,592,000 s |
| 朔望月 (太陰月) | mo (lunar) | 📅 Calendar & Astronomy | 1 mo (lunar) = 2,551,442.976 s | Complete lunar phase cycle = 29.53059 days ≈ 2,551,443 s |
| 年代 (10年間) | dec | 📅 Calendar & Astronomy | 1 dec = 315,569,520 s | 1 decade = 10 average Gregorian years ≈ 3.1557 × 10⁸ s |
| 世紀 (100年間) | cent | 📅 Calendar & Astronomy | 1 cent = 3,155,695,200 s | 1 century = 100 average Gregorian years ≈ 3.1557 × 10⁹ s |
| 千年紀 (ミレニアム) | mill | 📅 Calendar & Astronomy | 1 mill = 31,556,952,000 s | 1 millennium = 1,000 average Gregorian years ≈ 3.1557 × 10¹⁰ s |
| シェイク (核物理) | shake | ⚛️ Ultrafast Physics & Nuclear | 1 shake = 1.0000e-8 s | 1 shake = 10 nanoseconds = 10⁻⁸ s (generation time in nuclear reactions) |
| ピコ秒 | ps | ⚛️ Ultrafast Physics & Nuclear | 1 ps = 1.0000e-12 s | 1 picosecond = 10⁻¹² seconds (laser pulses) |
| フェムト秒 | fs | ⚛️ Ultrafast Physics & Nuclear | 1 fs = 1.0000e-15 s | 1 femtosecond = 10⁻¹⁵ seconds (molecular vibration time) |