Spike's Calculators

Calculate what the slope of the driveway is in a percent value.

- the difference in height from start to the end of the driveway
- enter the length of the driveway

- the slope ( grade) of the driveway in a percent value
- the ratio of the rise 1: n

- the difference in height from start to the end of the driveway
- enter the length of the driveway

- the slope ( grade) of the driveway in a percent value
- the ratio of the rise 1: n
- the slope ( grade) per mille

- Compound Interest
- 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