How it works
- Type a value in the left field.
- Pick the units to convert from and to.
- The result updates instantly, with a full reference table below.
Key units & conversion basis
Time units are converted through seconds (s). Note that a month uses the average value (30.44 days), so it may differ from a specific calendar month.
| Unit | Symbol | In seconds | Common use |
|---|---|---|---|
| Second | s | 1 s | SI base unit |
| Minute | min | 60 s | daily use |
| Hour | h | 3,600 s | work, sleep |
| Day | day | 86,400 s | deadlines |
| Week | wk | 604,800 s | project spans |
| Month (avg) | mo | 2,629,800 s | yearly estimate |
| Year | yr | 31,536,000 s | long-term |
🧮 How the conversion is calculated
Example: 3 days to hours → 3 × 86,400 = 259,200 s → ÷ 3,600 = 72 hours.
🎯 When to use this
- Convert project durations between days, weeks and hours
- Check contract periods (weeks, months) in foreign documents
- Convert lab or measurement data in seconds
- Convert project spans between weeks, days, and total work hours
📖 Guide: Converting Seconds to H:M:S →
Frequently Asked Questions
- How many hours is 1 week?
- 168 hours (7 days × 24 hours).
- How is 1 month calculated?
- Using the average of 30.44 days.
- How many hours are in a week?
- 7 × 24 = 168 hours. Two weeks is 336 hours.
- Why does the month use an average?
- Months vary from 28 to 31 days, so we use the yearly average (365.25 ÷ 12 = 30.44 days). Check a calendar for a specific month.
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