# Tank Volume Calc: Dip Chart — Fuel, Water & Oil Tank Levels

> Fuel, Water & Oil Tank Levels (iPhone/iPad app by 阳 孙.)

- Source: https://appshunter.io/ios/app/tank-volume-calc-dip-chart/id6757333240 (this page in markdown: same URL + `.md`)
- Developer: [阳 孙](https://appshunter.io/developer/1518808403)
- Category: Utilities
- Price: Free with in-app purchases (on sale, was $4.99)
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-01-05
- Data updated: 2026-10-26

## What is Tank Volume Calc?

Tank Volume Calculator gives you the exact volume of a tank at any liquid level. Enter the dimensions once, then read the volume, the percentage full and the weight of the liquid, or work backwards from a volume to the dip level.

Built for fuel, water, oil and chemical tanks on farms, job sites, depots, marinas and plants.

FREE
• Horizontal cylinders, vertical cylinders and rectangular tanks
• Flat, elliptical, hemispherical and dished (torispherical) heads, conical bottoms
• Level to volume and volume to level
• Liquid density presets (diesel, gasoline, water, oil) and weight in kg, lb or tons
• On-screen dip chart in 1 mm to 1 in steps
• Metric, US and Imperial units: liters, gallons, barrels, cubic meters
• One saved tank, sample tanks, works fully offline

PRO — one-time purchase, no subscription
• Unlimited saved tanks with location and serial number
• PDF dip charts to print or send
• CSV export for Excel and Numbers
• Inspection history with notes and gauge photos

Head volumes are calculated by numerical integration of the real head profile, not a rule of thumb, so partially filled horizontal tanks stay accurate across the whole range.

Customers who bought the original paid version keep Pro for free.

Questions or a tank shape you need? Write to us from the support link.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tank Volume Pro | $4.99 | one-time |


## Is Tank Volume Calc safe?

Not enough ratings yet to assess Tank Volume Calc.

## Is Tank Volume Calc legit?

Tank Volume Calc: Dip Chart appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Tank Volume Calc is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1 — 2026-10-21

• Free to download. Pro unlocks unlimited tanks, PDF and CSV export and inspection history. Customers of the paid 1.0 keep everything.
• New dished (torispherical) heads.
• Corrected volumes for hemispherical-head tanks filled above the midline.
• Liquid density and weight in kg, lb or tons.
• CSV export of the dip chart.

### 1.0 — 2026-01-06

No release notes.

## More apps by 阳 孙

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- [Stand Up! Drink Water!](https://appshunter.io/ios/app/stand-up-drink-water/id1546525023)

All apps by 阳 孙: https://appshunter.io/developer/1518808403

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-26.*