Spike's Calculators

This calculator will calculate the height difference in inches based on the required slope percentage and the length of the area that requires the slope.

- Enter the length in feet and inches
- required slope in a percentage
- decimal precision, the number of digits after the decimal point

- height difference in decimal inch
- height difference inches plus fraction

24'-6" = 100% To make it easier and more useful, convert the foot value into inches 24 * 12 = 288 + 6 = 294" 294 = 100%Divide this amount by one hundred and multiply it by two to get the 2 percent value;

294 ÷ 100 = 2.94 * 2 = 5.88"The garage floor needs a height difference of 5.88 inches to get the required 2% slope.

- Discount in Percentages
- Elevation from Slope Percentage
- Fraction to Decimal and Percent
- Number of a Number Percentage
- Number to Percent
- Percent of a Percent
- Percent to Fraction
- Percentage Amount to a 100% Amount
- Percentage Amount from a Starting Amount
- Slope of a Driveway in a Percentage
- Surcharge in Percentages