About this tool
What Is a Time Duration Converter?
A time duration converter translates time values between seconds, minutes, hours, days, weeks, months, and years using standard conversion factors. It is essential for project planning (weeks to work days), billing (minutes to decimal hours), scheduling, and understanding time periods.
Conversion factors:
- 1 minute = 60 seconds
- 1 hour = 60 minutes = 3,600 seconds
- 1 day = 24 hours = 86,400 seconds
- 1 week = 7 days = 168 hours
- 1 month = 30 days (averaging) = 720 hours
- 1 year = 365 days = 8,760 hours
Common Time Conversions
| From | To | Factor |
|---|---|---|
| Minutes → Hours | ÷ 60 | 90 min = 1.5 hrs |
| Hours → Days | ÷ 24 | 36 hrs = 1.5 days |
| Days → Weeks | ÷ 7 | 21 days = 3 weeks |
| Hours → Minutes | × 60 | 8 hrs = 480 min |
| Weeks → Days | × 7 | 6 weeks = 42 days |
Note: Months use a 30-day average and years use 365 days. For calendar-precise calculations involving February or leap years, use a date calculator instead.
Decimal Hours for Billing
Freelancers and time-tracking systems often need decimal hours instead of minutes:
- 15 minutes = 0.25 hours
- 30 minutes = 0.50 hours
- 45 minutes = 0.75 hours
- 90 minutes = 1.50 hours
- 210 minutes = 3.50 hours
Practical Usage Examples
Work Day
8 hours → minutes
8 hours = 480 minutesProject Sprint
3 weeks → days
3 weeks = 21 daysStep-by-Step Instructions
Step 1: Enter Value. Input the time duration you want to convert (e.g., 150).
Step 2: Select Source Unit. Choose the unit your value is in (seconds, minutes, hours, days, weeks, months, or years).
Step 3: Select Target Unit. Choose the unit to convert to.
Step 4: Review Results. See the conversion result, all unit equivalents, a natural-language time breakdown, and practical examples.
Step 5: Use Presets. Try the "Standard Work Day" or "Convert Minutes to Billable Hours" presets for common calculations.
Core Benefits
Simultaneous Multi-Unit Output: Converts your input to ALL 7 time units at once — no need to run multiple conversions.
Natural Language Breakdown: Shows results in human-readable format (e.g., "2 years, 3 months, 15 days") instead of just decimal numbers.
Conversion Formula Display: Shows the exact multiplication factor used, so you can verify or reproduce the math offline.
Contextual Examples: Provides practical real-world examples relevant to the magnitude of your input (project planning, billing, fitness, cooking).
Frequently Asked Questions
Divide the number of minutes by 60. For example, 90 minutes ÷ 60 = 1.5 hours. For billing purposes, 1.5 hours is often written as 1:30 (1 hour 30 minutes) or 1.50 decimal hours.
There are 168 hours in a week (24 hours × 7 days). A standard 40-hour work week uses only 23.8% of the total hours available. Including 8 hours of sleep per night leaves 72 non-work, non-sleep hours.
Divide minutes by 60. Examples: 15 min = 0.25 hrs, 30 min = 0.50 hrs, 45 min = 0.75 hrs. Most time-tracking software and invoicing systems use decimal hours rather than hours and minutes.
Calendar months vary from 28 to 31 days. The 30-day average is a standard simplification used in finance (360-day year), contracts, and general estimation. For precision, use a date calculator that accounts for specific month lengths.
There are 86,400 seconds in a day (60 seconds × 60 minutes × 24 hours). In computing, Unix timestamps count seconds since January 1, 1970, making this conversion fundamental to software engineering.
Elapsed time is the total duration between two events (e.g., 3 hours 45 minutes). Clock time is the specific hour shown on a clock (e.g., 2:30 PM). This converter handles elapsed duration, not clock time calculations.
Multiply weeks by 5 for working days (standard 5-day work week) or by 7 for calendar days. Example: 4 weeks = 20 working days = 28 calendar days. Project managers typically use working days.
A common year is 365 days. A leap year is 366 days. The average Gregorian year is 365.2425 days. This converter uses 365 days. For multi-year calculations where leap years matter, the difference is approximately 1 day every 4 years.
Yes. Enter any decimal value (e.g., 2.5 hours = 150 minutes). The converter handles fractional inputs for all units. This is particularly useful for converting decimal billing hours back to minutes.
No. All conversions happen in your browser using JavaScript arithmetic. No data is transmitted to any server.