This earthwork volume calculator finds the volume between two cross-sections using the average end area method, standard for road cut and fill. Enter the two areas and the distance above.
Formula
Volume = L ÷ 2 × (A₁ + A₂)
Example
A₁ = 20 m², A₂ = 30 m², L = 30 m: V = 30 ÷ 2 × (20 + 30) = 750 m³.
Related calculators
Frequently Asked Questions
How do I calculate earthwork volume?
Average the two end cross-section areas and multiply by the distance between them: V = L/2 x (A1 + A2).
What is the average end area method?
A standard way to estimate cut and fill volume between surveyed cross-sections along an alignment.
Is the prismoidal formula more accurate?
Yes, slightly. It adds a middle area term, but average end area is simpler and widely used.