Time Converter | Convert Seconds, Minutes, Hours, Weeks

Convert time units instantly with Digital Calculator Time Converter. Enter any duration and switch between seconds (s), minutes (min), hours (h), days (d), and weeks (wk)—plus sub-seconds like milliseconds (ms), microseconds (µs), nanoseconds (ns).

Behind the scenes, we anchor every calculation to the SI second (per BIPM/NIST definitions), so your results are consistent, precise, and presentation-ready. You can set decimal places, use thousand separators, or display results in scientific notation for technical reports.

How the Time Converter Works

1) Enter a value

Type any number (whole or decimal). Scientific notation is supported (e.g., 1.2e3 seconds).

2) Choose the starting unit

Seconds, minutes, hours, days, weeks—and sub-seconds (ms, µs, ns).

4) Copy or share the result

Copy the output to your document, spreadsheet, or ticket. You can also share a prefilled link for teammates.

Note: This tool converts durations. If you need time zones, DST adjustments, or timestamps (UTC, ISO 8601, Unix epoch), use a dedicated time zone or timestamp converter.

Units You Can Convert

• SI & submultiples: nanosecond (ns), microsecond (µs), millisecond (ms), second (s)

• Common units: minute (min), hour (h), day (d), week (wk)

• Calendar-aware: month, year (see notes below)

• About months & years: Calendar months vary (28–31 days).

• Years can mean 365 days (common), 366 days (leap)

• Gregorian mean ~365.2425 days

Julian year = 365.25 days (31,557,600 s) used in astronomy. Choose a convention before converting months/years.

Popular Time Conversions

Seconds to Minutes: 1 min = 60 s.
Example: 7.5 min → 450 s.

Minutes to Hours: 1 h = 60 min.

Example: 2.5 h → 150 min.

Hours to Seconds: 1 h = 3,600 s.

Example: 3 h → 10,800 s.

Days to Hours: 1 d = 24 h.

Example: 2.75 d → 66 h.

Weeks to Days: 1 wk = 7 d.

Example: 3 wk → 21 d.

Milliseconds to Seconds: 1 s = 1,000 ms.

Example: 250 ms → 0.25 s.

Microseconds to Seconds: 1 s = 1,000,000 µs.

Example: 500,000 µs → 0.5 s.

Nanoseconds to Seconds: 1 s = 1,000,000,000 ns.
 

Use these as mental checks then let the Time Converter handle the exact math and rounding.

How Conversions Work (Formulas & Base Unit)

All conversions pivot on the second:

Formula: 

target = source × (source_to_second) × (second_to_target)

Base factors (SI-aligned):

• 1 min = 60 s
   
• 1 h = 60 min = 3,600 s
   
• 1 d = 24 h = 86,400 s
   
• 1 wk = 7 d = 604,800 s
   
• Sub-seconds: 1 ms = 10⁻³ s; 1 µs = 10⁻⁶ s; 1 ns = 10⁻⁹ s

Months & years (choose a convention):

• Gregorian mean year ≈ 365.2425 d
   
• Julian year = 365.25 d (31,557,600 s)
   
• Common year = 365 d; Leap year = 366 d
   

Because the converter uses the second as a hub, you can chain any pair confidently (e.g., weeks → seconds → hours).

Some Daily Use Where Time Converter Used

• Project planning & SLAs: Convert lead times (h to d), aggregate weekly backlogs (wk to h), and standardize reports.
   
• Fitness & training: Summarize intervals (s to min), long runs (min to h), or challenges (d to h).
   
• Education & labs: Tidy units for physics problems, kinematics, and reaction times (ms/µs).
   
• Media & production: Map clip lengths to frame timing (ms to s to min) and keep captions/subtitles aligned.
   
• DevOps & analytics: Normalize latency (ms, µs), timeouts, cron intervals, and retention windows (h, d, wk).

Try the Time Converter now at the Digital Calculator to standardize durations, prevent rounding mistakes, and ship reports your stakeholders can trust.