Calculation result
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Educational planning arithmetic only. Enter your own measured values and properties; these results are not an engineering specification, safety decision, or equipment recommendation.
Formula and method
Internal area A = πD²/4. Volume V = A × L, where D is the internal diameter and L is straight pipe length. Convert both dimensions to meters before multiplying. Results include cubic meters, liters, cubic feet, and U.S. gallons. One U.S. gallon equals 3.785411784 liters (NIST conversion reference).
Worked example
With a 0.1 m inside diameter and 10 m length, the internal area is about 0.00785398 m² and volume is 0.0785398 m³, or 78.5398 L.
Scope and limitations
This is a simple cylinder model. Nominal pipe size, wall thickness, fittings, valves, bends, trapped air, deformation, and partially filled conditions are not modeled. Check the actual inside diameter and geometry before using a capacity estimate.
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