Spike's Calculators

This calculator will calculate the drop in inches, the difference in elevation, from a slope expressed as a percentage.

Formula used : elevation change = ( percentage ÷ 100) * length

convert 20 feet to inches

20 * 12 = 240" 240 * (2 ÷ 100) = 240 * 0.02 = 4.8 = 4^{13}/_{16}"

- length in feet & inches
- required slope in a percentage
- fraction precision preset @16

- required drop in inches

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