My Calculator Stack · Weather formulas

Weather · Formula sheet

Weather formulas

One printable sheet for 2 Weather tools — formulas collected from each calculator’s How it works.

Weather calculators →

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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\[ 1\,\mathrm{in}=25.4\,\mathrm{mm} \]

Enter Mode (0=mm→in,1=in→mm) and Value for the Rain Convert Calculator; use only the listed mode or unit codes. The calculator reports Converted: 1 inch = 25.4 mm of precipitation. Use mode 0 or 1 exactly; the conversion is exact apart from display rounding.

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