About the Contour Interval Volume Estimator Online Free Tool

The Contour Interval Volume Estimator Online Free Tool computes approximate volume from elevation-area rows using the end-area method.

How to Use the Contour Interval Volume Estimator Online

1. Enter one row per contour as elevation,area.
2. Use increasing contour elevations and area in square units matching the elevation unit.
3. Run the estimator to review contour interval range and volume.

Choosing Options Correctly

Area values should represent the enclosed area at each contour. The end-area method is approximate and can differ from prismoidal, grid, TIN, or CAD/GIS volume methods.

Common Use Cases

• Estimate reservoir or stockpile volume from contour areas.
• Check earthwork planning numbers.
• Compare contour interval effects.

Quick FAQ

Do rows need to be sorted?
No. The tool sorts by elevation before calculating.

Can areas be negative?
No. Areas must be zero or positive.

What units does the result use?
Use consistent area and elevation units. For metric inputs, volume is typically interpreted as cubic meters.

Is this a final earthwork quantity?
No. It is a contour-method estimate. Verify with survey surfaces, grid methods, or civil design software for final quantities.