Cone Volume Calculator (liters & gallons)
Cone volume in liters and gallons: V = ⅓πr²h.
- Example: r = 15 cm, h = 20 cm → 4,712 cm³ = 4.71 L ≈ 1.24 US gal.
- Free instant tool.
Figures are estimates from this calculator’s standard formula — adjust the inputs in the tool below for your exact number.
How the Cone Volume Calculator Works
The calculator applies V = ⅓πr²h, then converts: 1 L = 1000 cm³ and 1 ft³ = 7.4805 US gallons. Worked example: a conical tank with r = 15 cm and h = 20 cm holds V = ⅓π × 225 × 20 = 4,712 cm³ = 4.71 L ≈ 1.24 US gallons. A waffle cone (r = 3 cm, h = 12 cm) holds about 0.11 L. Radius fields expect radii — halve any diameter first.
- 1
Enter the measurements
Type the values required by the formula for cone volume.
- 2
Check the units
One unit system throughout — cm, m, ft or in.
- 3
Read the result
The calculator substitutes, evaluates and rounds only at the end.
Use Cases
Sizing tanks, silos and material estimates
Homework, exams and engineering checks
Verifying spreadsheet formulas before ordering materials
Tips
- 1
Volume scales with the cube of linear dimensions
- 2
Convert results: 1 m³ = 1000 L, 1 ft³ = 7.48 US gal
- 3
π ≈ 3.14159 — precision kept to the last step
Common Mistakes
Mixing units (cm radius with m height)
Entering a diameter where the formula wants a radius
Forgetting the solid must be closed — check h > 0
FAQs
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