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1 day = 86,400 seconds
Saved results
| # | Input seconds | Decimal days | D:H:M:S | Time |
|---|
Export buttons include all rows you add below.
Example data
Click Load to populate the calculator with any row.
| Seconds | Expected days (decimal) | Expected D:H:M:S | Action |
|---|---|---|---|
| 86400 | 1 | 1:0:0:0 | |
| 172800 | 2 | 2:0:0:0 | |
| 90061 | 1.041331 | 1:1:1:1 | |
| 1234567 | 14.285835 | 14:6:56:7 | |
| 3600 | 0.041667 | 0:1:0:0 |
Formula used
The conversion relies on the identity 1 day = 86,400 seconds.
- Decimal days:
days = seconds / 86,400 - Breakdown:
days = floor(|seconds| / 86,400), then remainder yieldshours = floor(r / 3,600),minutes = floor(r2 / 60),seconds = r2 % 60. The sign of the input is reapplied to the decimal value.
For fractional seconds, the decimal form is accurate to your selected precision. The D:H:M:S breakdown displays second fractions if present.
How to use this calculator
- Enter a value in Seconds (supports scientific notation like
1.5e6). - Choose Decimal days or D:H:M:S breakdown and select decimal places.
- Click Convert & Add Row to compute and store the result.
- Use Copy Latest Result to copy a clean text string.
- Export your table via CSV or PDF when done.
Tip: You can prefill via URL, e.g., ?seconds=172800&precision=4&mode=decimal.
FAQs
A civil day is defined as 24 hours, each hour has 3,600 seconds, so 24 × 3,600 = 86,400. Leap seconds are rare and not considered here.
Yes. The decimal result carries the sign. The D:H:M:S breakdown uses absolute components with the sign shown in the main value for clarity.
Precision is user selectable up to 12 places. Internally JavaScript uses double‑precision floating point, which is suitable for most practical ranges of seconds.
It is days:hours:minutes:seconds. For example, 90061 seconds equals 1:1:1:1, meaning 1 day, 1 hour, 1 minute, and 1 second.
Yes. Use the URL parameters
seconds, precision, and mode to prefill the form automatically.