My Calculator Stack · Weather formulas
Weather formulas
One printable sheet for 2 Weather tools — formulas collected from each calculator’s How it works.
Hiking ETA Calculator
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\[ t\approx d/v + h/2000 \]
Enter Distance (mi), Pace (mph), and Elevation gain (ft) for the Hiking ETA Calculator; retain the units printed in each label. The calculator reports Hours and Minutes: Time ≈ distance/pace plus elevation allowance. The rule is only a baseline and does not model descents, rests, weather, or trail difficulty.
Rain Convert Calculator
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\[ 1\,\mathrm{in}=25.4\,\mathrm{mm} \]
Choose millimeters to inches or inches to millimeters, then enter the rainfall depth. Millimeters convert by dividing by 25.4; inches convert by multiplying by 25.4. The factor is exact; the displayed result may round.
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