Mars Sol to Earth Days
Convert mission logs from Martian sols into familiar Earth days. Because a sol lasts roughly 24 hours 39 minutes, multiplying by 1.027491 gives you the Earth-day duration for science briefs, project planning, or classroom lessons.
Educational information, not professional advice.
Examples
- 1 sol ⇒ 1.0275 Earth days
- 7 sols ⇒ 7.1924 Earth days
- 30 sols ⇒ 30.8247 Earth days
- 90 sols ⇒ 92.4742 Earth days
- 669 sols (one Martian year) ⇒ 687.30 Earth days
FAQ
Why is a sol longer than an Earth day?
Mars rotates more slowly on its axis, so a full spin takes about 39 minutes 35 seconds longer than Earth's 24-hour day.
Can I enter partial sols?
Yes. Decimals such as 0.25 or 1.75 capture partial shifts, rover activity windows, or experiment durations.
Does the calculation include orbital effects or communication delays?
No. It only converts local solar day length. Use additional mission-planning tools for orbital phasing, light-time delay, or energy budgets.
How accurate is the 1.027491 multiplier?
It is based on the mean sidereal sol (88,775.244 seconds). Small seasonal variations on Mars change the exact length by milliseconds, which is negligible for most schedules.
How do I convert the result to hours or minutes?
Multiply the Earth-day answer by 24 for hours or by 1,440 for minutes; multiply by 86,400 for seconds.
Additional Information
- Formula: Earth days = sols × 1.027491, derived from the 88,775.244-second length of a Martian sol.
- Each sol is about 39 minutes 35 seconds longer than an Earth day, so a 100-sol plan stretches roughly 2.75 Earth days beyond a same-length Earth schedule.
- Enter fractional sols (for example 0.25 or 1.5) to convert partial work shifts, EVA windows, or camera exposure campaigns.
- Multiply the output by 24 for Earth hours or by 1,440 for Earth minutes when briefing teams that schedule by clock time.