Instantly convert any time value between milliseconds, seconds, minutes, hours, days, weeks, and years.
Type any positive number or decimal value into the amount input field (e.g. 2.5, 90, 3600).
Choose your starting time unit: seconds, minutes, hours, days, weeks, years, or milliseconds.
The converter displays a real-time matrix across all 7 time units with high precision and clean scientific rounding.
Target_Value = (Input_Value × To_Seconds_Factor[From_Unit]) ÷ To_Seconds_Factor[To_Unit] 1 Minute = 60 Seconds1 Hour = 3,600 Seconds (60 × 60)1 Day = 86,400 Seconds (24 × 3,600)1 Week = 604,800 Seconds (7 × 86,400)1 Solar Year = 31,536,000 Seconds (365 × 86,400)Base-60 and base-24 multipliers provide deterministic, reversible conversion across all standard time scales.
Step-by-step breakdown of common real-world time scenarios, work shifts, and duration math.
Converting 2.5 hours into smaller and larger time intervals.
2.5 × 60 = 150 mins | 2.5 × 3600 = 9,000 secs | 2.5 ÷ 24 = 0.104167 days Determining the hours and days represented by 10,000 seconds of server uptime.
10,000 ÷ 3600 = 2.7778 hours | 10,000 ÷ 86400 = 0.1157 days Calculating total billable hours in a 3-week sprint cycle.
3 weeks × 7 days × 24 hours = 504 hours How professionals and individuals apply this calculation across various industries.
Convert execution durations and server timeouts between milliseconds, seconds, and minutes.
Translate marathon splits and training intervals from total seconds to hours, minutes, and days.
Convert large observation time spans and experimental half-lives across standard solar years, weeks, and hours.
Convert frame counts and raw timeline seconds into hours, minutes, and milliseconds for editing.
Time conversion relies on exact mathematical relationships established by astronomy, physics, and international standardization (SI units). The fundamental SI base unit of time is the second (s).
| Time Unit | Equivalent in Seconds | Equivalent in Minutes | Equivalent in Hours |
|---|---|---|---|
| 1 Minute | 60 seconds | 1.0 min | 0.016667 hours |
| 1 Hour | 3,600 seconds | 60 minutes | 1.0 hour |
| 1 Day (24h) | 86,400 seconds | 1,440 minutes | 24.0 hours |
| 1 Week (7d) | 604,800 seconds | 10,080 minutes | 168.0 hours |
| 1 Year (365d) | 31,536,000 seconds | 525,600 minutes | 8,760.0 hours |
For focused conversions between specific units, use our dedicated tools: convert decimal hours with the Hours to Minutes Converter, compute remainder minutes on the Minutes to Hours Converter, format for payroll on the Decimal Hours Calculator, or calculate elapsed durations on our flagship Time Duration Calculator.
| Hours | Minutes | Seconds | Days |
|---|---|---|---|
| 0.5 hr (30m) | 30 mins | 1,800 s | 0.0208 days |
| 1.0 hr | 60 mins | 3,600 s | 0.0417 days |
| 1.5 hrs (90m) | 90 mins | 5,400 s | 0.0625 days |
| 2.0 hrs | 120 mins | 7,200 s | 0.0833 days |
| 2.5 hrs | 150 mins | 9,000 s | 0.1042 days |
| 8.0 hrs (Workday) | 480 mins | 28,800 s | 0.3333 days |
| 24.0 hrs (1 Day) | 1,440 mins | 86,400 s | 1.0000 day |
| 40.0 hrs (Workweek) | 2,400 mins | 144,000 s | 1.6667 days |
There are exactly 86,400 seconds in a standard 24-hour day (24 hours × 60 minutes × 60 seconds = 86,400 seconds).
To convert 2.5 hours to minutes, multiply by 60: 2.5 × 60 = 150 minutes. To convert to seconds, multiply 150 by 60 = 9,000 seconds.
There are 10,080 minutes in a 7-day week (7 days × 24 hours × 60 minutes = 10,080 minutes).
All calculations on this tool are deterministic and rigorously tested against base-60 modulo arithmetic and US Fair Labor Standards Act (FLSA 29 CFR § 785.48) payroll rounding guidelines.