Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Earthwork Cut & Fill Calculator

Calculate the volume of soil to cut or fill when grading a site from an existing elevation to a target finish grade. Used by contractors and civil engineers for site grading, road construction, and land development projects.

Project Area (sq ft)

Existing Grade (ft elevation)

Finish Grade (ft elevation)

Fill in the required fields to see your result.

Civil

Storm Water Drainage Calculator

Estimate peak stormwater runoff and determine the minimum pipe diameter needed to handle it. Used by civil engineers and drainage designers when sizing pipes for subdivisions, roads, or urban catchments.

Catchment Area (hectares)

Design Rainfall Intensity (mm/hr)

Runoff Coefficient

Pipe Slope (%)

Manning's Roughness Coefficient

Fill in the required fields to see your result.

Key differences

	Earthwork Cut & Fill Calculator	Storm Water Drainage Calculator
Category	Civil	Civil
Inputs required	3	5
Result	Material Volume (cubic yards)	Required Pipe Diameter (mm)
What it does	Calculate the volume of soil to cut or fill when grading a site from an existing elevation to a target finish grade. Used by contractors and civil engineers for site grading, road construction, and land development projects.	Estimate peak stormwater runoff and determine the minimum pipe diameter needed to handle it. Used by civil engineers and drainage designers when sizing pipes for subdivisions, roads, or urban catchments.