Stephen Peters

Free version of the popular MPG Calc app.=========================================================This free version will perform all calculations that …

Calculate the fuel efficiency of your vehicles, dependent on the distance travelled since last fuel stop, and the amount of fuel it took to fill the t …

What time is it on Mars?It depends upon the spacecraft.Time is uniquely established for each spacecraft operating on the surface of Mars.Dates are mea …

Don't let your flashlight drain your battery!A minimal flashlight with just the features you need.Stays on until you quit — or battery charge is low.D …

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 …