Add/Subtract Miles, Kilometers, Furlongs, Yards, Feet, Inches
12 inches === 1 foot
3 feet === 1 yard
220 yards === 1 furlong
5 furlongs === 1 kilometer
1.6 kilometers === 1 mile

The decimal measuring system uses 100 to advance from centimeters to Meters and 1,000 to advance to Kilometers.

The process of adding and subtracting lengths uses a multi-base system of 12, 3, 220, 5 and 1.6 to move from inches through miles.

To do a calculation follow the following steps :-

Select Add or Subtract to add or subtract components.
Input the number of components to add or subtract.
Decide the form in which you want your results.
Then press 'Add/Subtract Component'.
Add or Subtract Lengths
Multiply/Divide Time

CLICK HERE if you have any ideas for calculators you would like to see added; or improvements to existing ones made. Please tell us of any errors observed!