How long is a lunch hour on Mars?
An hour you might think? Well, actually...

It turns out that average length of a day on Mars—a "sol"—is approximately 24 hours and 40 minutes. Since this is so close to Earth's 24-hour day, scientists and engineers operating spacecraft on the surface of Mars have found it convenient to think of a sol as consisting of 24 slightly longer "Mars hours", divided into correspondingly longer "Mars minutes" and "Mars seconds".

Use this simple app to convert both ways between Earth durations and Mars durations.

Pick a duration.
Select Earth-to-Mars or Mars-to-Earth conversion.
Tap displayed durations to choose hh:mm:ss, total minutes, or total seconds.

Oh! And that lunch hour on Mars? It's 1 hour, 1 minute, and 39 seconds.


Designed for iPhone, runs on iPad.
Double-tap-drag with three fingers to adjust size on iPad.

What’s New

Version 1.2

This app has been updated by Apple to use the latest Apple signing certificate.

modern appearance
support for portrait orientation

Ratings and Reviews

2.5 out of 5
2 Ratings

2 Ratings

App Privacy

The developer, Stephen Peters, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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