Tank Volume Calculator

Horizontal Oval Tank Calculator

Calculate the volume of liquid in horizontal oval tanks. Perfect for heating oil tanks, propane storage, and elliptical vessels with accurate complex geometry calculations.

Horizontal Oval Tank Volume Calculator
Calculate the volume of liquid in horizontal oval tanks using complex elliptical geometry

Tank Diagram

Width (W)Height (H)Ld

Measurement Guide:

  • Width: Measure the widest horizontal dimension
  • Height: Measure the tallest vertical dimension
  • Length: Measure from end to end of the tank
  • Liquid Depth: Measure from bottom to liquid surface
  • Use a dipstick or gauge for accurate depth measurement

Common Tank Sizes:

  • • 275-gal heating oil: 64" × 27" × 44"
  • • 330-gal heating oil: 72" × 27" × 44"
  • • 500-gal propane: 120" × 30" × 24"

What is a Horizontal Oval Tank?

A horizontal oval tank is a storage vessel with an oval or elliptical cross-section that lies on its side. These tanks combine the structural benefits of curved surfaces with space efficiency, making them ideal for residential and commercial fuel storage applications.

Common Applications
Where oval tanks are typically used
  • • Residential heating oil storage
  • • Propane and LPG storage
  • • Underground fuel tanks
  • • Marine fuel systems
  • • RV and mobile home fuel tanks
  • • Agricultural fuel storage
Design Advantages
Why oval shapes are chosen
  • • Lower profile than cylindrical tanks
  • • Better stability when horizontal
  • • Efficient use of underground space
  • • Reduced surface area for heat loss
  • • Easier to transport and install
  • • Good structural strength

Types of Oval Tanks

Racetrack Oval

Flat sides with semicircular ends. Common in heating oil tanks and underground storage.

True Elliptical

Mathematical ellipse shape. Often used in pressure vessels and specialized applications.

Modified Oval

Custom shapes combining oval and rectangular elements for specific installation requirements.

How to Use the Calculator

1

Measure Tank

Measure the width (widest point), height (tallest point), and length of your oval tank

2

Check Liquid Depth

Measure the depth of liquid from the bottom of the tank using a gauge stick or dipstick

3

Enter Dimensions

Input all measurements into the calculator using your preferred units

4

Get Results

View calculated volume in gallons, liters, and other units with percentage full information

Formulas Used

Horizontal Oval Tank Volume Calculation
Complex geometry combining rectangular and circular segments

Step 1: Calculate Cross-Sectional Area

For an elliptical cross-section:

A = π × (W/2) × (H/2)

Where W = width, H = height

Step 2: Calculate Liquid Cross-Sectional Area

For partially filled ellipse:

Aliquid = Complex elliptical segment calculation

Involves integration of elliptical segments based on liquid depth

Step 3: Calculate Total Volume

Vliquid = Aliquid × L

Where L = tank length

Note: The actual calculation involves complex mathematical integration to determine the area of an elliptical segment. Our calculator uses numerical methods to provide accurate results for any liquid depth in oval tanks.

Worked Examples

Example 1: 275-Gallon Heating Oil Tank
Standard residential heating oil tank

Tank Specifications:

  • Length: 64 inches
  • Width: 27 inches
  • Height: 44 inches
  • Current liquid depth: 20 inches

Calculation Process:

1. Calculate elliptical cross-section area

2. Determine liquid segment area at 20" depth

3. Multiply by tank length (64")

4. Convert to gallons

Result: Approximately 140 gallons of heating oil remaining (about 51% full)

Example 2: Underground Propane Tank
Residential propane storage calculation

Tank Specifications:

  • Length: 96 inches (8 feet)
  • Width: 30 inches
  • Height: 24 inches
  • Current liquid depth: 18 inches

Application Notes:

• Propane tanks are typically filled to 80% capacity

• Liquid propane weighs about 4.2 lbs/gallon

• Tank is currently 75% full by volume

Result: Approximately 185 gallons of propane (about 777 lbs of fuel)

Frequently Asked Questions - Horizontal Oval Tanks