Wellbore Volume Calculator
Calculate tubing internal volume, annular volume, and total wellbore fluid volume. Essential for kill sheet preparation, cement jobs, and fluid displacement calculations.
Pipe & Hole Dimensions
Tubing / Drill Pipe
Casing / Wellbore
Results
Tubing Capacity
--
bbl
Annular Volume
--
bbl
Total Wellbore
--
bbl
Tubing + Annular
--
bbl
Tubing Cap. (bbl/ft)
--
Ann. Cap. (bbl/ft)
--
Tubing (gallons)
--
Annular (gallons)
--
Equations
Tubing capacity: Ct = (ID/12)² × π/4 × depth × (1/5.615) [bbl]
Annular capacity: Ca = [(Csg ID/12)² - (Pipe OD/12)²] × π/4 × depth × (1/5.615) [bbl]
Conversion: 1 bbl = 42 gallons = 5.615 ft³
Quick formula: bbl/ft = (D₁² - D₂²) / 1029.4 [D in inches]
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