Horizontal Tank Volume Calculator

Calculate the total volume and liquid volume of horizontal cylindrical storage tanks using the circular segment method.

Formula Used: V = L × R² × (θ - sin θ × cos θ)

Where: L = tank length, R = radius, θ = cos⁻¹((R-h)/R) in radians, h = liquid level
The circular segment area = R² × (θ - sin θ × cos θ)
Liquid Volume = Segment Area × Tank Length

Application Scenarios

Horizontal storage tanks at petroleum filling stations
Underground storage tanks (UST) inventory management
Process tanks in chemical and food processing industries
Calibration of tank gauging systems
Engineering design and sizing of horizontal vessels

Common Calculation Errors

Using the vertical tank formula for horizontal tanks (incorrect!)
Not converting degrees to radians when calculating θ
Forgetting that the segment area formula only works for partially filled tanks
Ignoring the volume of end caps (hemispherical/conical heads)
Measurement errors in liquid level due to tank tilt or uneven foundation