There are three main differences between contour interval and horizontal equivalent as follows:
| S.No | Contour Interval | Horizontal Equivalent |
| 1 | It is based on vertical levels | Represents horizontal distance |
| 2 | No measurement or scaling is required since the contour levels are indicated on the contour lines | The distance must be measured on the map and converted to actual distance by multiplying with the scale of the map |
| 3 | In a given map the contour interval is a constant | The horizontal equivalent varies with slope. Closer distance indicates steep slope and wider distance gentle slope |
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