Horizontal Tank Volume Calculator
Calculate liquid volume in horizontal cylindrical tanks with dipstick chart generation
Unit System
Tank Parameters
Dipstick Chart
Generate a lookup table for liquid depth to volume conversion. Print and post it near the tank for quick reference.
Reverse Calculation
Enter target volume to calculate the required liquid depth.
Calculation Results
Tank Cross-Section
Volume Distribution
About Horizontal Tank Volume Calculator
The Horizontal Tank Volume Calculator is a professional online tool for calculating the liquid volume in horizontal cylindrical tanks (lying tanks). When you only have a dipstick to measure the liquid depth, this calculator can precisely determine how much liquid remains in the tank. The calculation involves circular segment area integration with inverse trigonometric functions, which is extremely complex to compute manually. This tool gives you instant results.
How to Use
- Enter the tank diameter (internal diameter)
- Enter the tank length (excluding heads)
- Enter the liquid depth measured by dipstick
- Select the head type (flat, elliptical, torispherical, or hemispherical)
- The system instantly calculates and displays liquid volume and fill percentage
Formula Explanation
Partial fill volume calculation for horizontal cylindrical tanks involves the "Circular Segment" area:
Segment Area A = R²×arccos((R-h)/R) - (R-h)×√(2Rh-h²)
Cylinder Volume = Segment Area × Length
Where R = radius, h = liquid depth, L = length
Applications
- Factory oil tank level monitoring
- Farm water storage tank management
- Chemical raw material storage calculation
- Gas station underground tank inventory
- Ship ballast water calculation
Frequently Asked Questions
Q: What are tank heads? Why do I need to select head type?
A: Tank heads are the end caps of the tank. Different head shapes add different volumes. Flat heads add no extra volume, while elliptical, torispherical, and hemispherical heads increase capacity. Selecting the correct head type gives more accurate results.
Q: What is a dipstick chart for?
A: A dipstick chart is a reference table listing the volume corresponding to different liquid depths. You can print it and post it near the tank, so personnel can instantly know the remaining volume by reading the dipstick without using a calculator every time.
Q: How accurate is the calculation?
A: This calculator uses standard engineering mathematics formulas with theoretical error less than 0.01%. In practice, errors mainly come from measurement inaccuracy (uneven liquid surface, tilted dipstick). We recommend taking multiple measurements and averaging.
Formula Sources
- Wolfram MathWorld - Horizontal Cylindrical Segment
- API 2551 - Petroleum Storage Tank Measurement Standard
- Math Open Reference - Partial Cylinder Volume
Last Updated: November 2025
