Haverly's PetroCalc
Haverly Systems, Inc. Utilities iPhoneiPadiPod touch
Haverly's PetroCalc is a free Utilities app for iPhone and iPad by Haverly Systems, Inc. Rated 4.7/5 from 3 ratings. Requires iOS 12.2. Updated May 2, 2026.
- Rating
- 4.7
- 3 ratings
- Price
- Free
- on the App Store
- Size
- 54 MB
- Age 4+
- Updated
- May 2
- 2026 · v2.1.1
Screenshots
About Haverly's PetroCalc
PETROCALC – THE TRUSTED PETROLEUM CALCULATOR IN YOUR POCKET PetroCalc is the all‑in‑one oil & gas calculator that engineers, technicians, and students rely on for fast, accurate viscosity calculations, crude‑oil blending, and every other petroleum‑property task. Whether you need an oil calculator for the field, a crude‑oil calculator for the lab, or a classroom reference, PetroCalc streamlines every petroleum calculation—from viscosity blending to heating‑value look‑ups—completely offline. KEY FEATURES • Unit Conversion – Instantly switch between energy units (MJ/m³, MBTU/bbl, BTU/gal, kCal), temperature (°F/°C), pressure (psi/bar), oil‑density & gravity (kg/m³, API °, specific gravity), kinematic ↔ dynamic viscosity (cSt ↔ cP) and operational scales (SUS, SFS, Redwood I, Engler °), plus calorific‑value conversions and more with our intuitive oil & gas calculator interface. • Distillation‑Curve Tools – Convert temperatures between TBP, ASTM D86, D1160, and D2887 scales and perform yield‑temperature interpolation for full distillation‑curve analysis. • Blending Tools – Execute precise crude‑oil blending and petroleum blending for RVP, Flash Point, Smoke Point, Pour / Cloud / Freeze Point, API Gravity, Aniline Point, Mercaptan Sulfur, Nitrogen, and custom fractions. • Fuel Property Indices – Compute Cetane Index (ASTM D4737 A/B, D976), Driveability Index, Refractive Index, and additional viscosity calculations. • Heating Values – Obtain Gross & Net HHV in MJ/m³, MBTU/bbl, BTU/gal, kCal/kg, and more. • Boiling‑Point Utilities – IBP/EBP plus five average‑boiling‑point methods (Volume, Weight, Molal, Cubic, Mean). • K‑Factor Calculations – UOP K, Watson K, VRC K, Whole‑Crude K at any temperature. • Viscosity Prediction – Single‑point, two‑point (Twu), and API 11A4.2 models with built‑in viscosity‑blending conversions. WHY PETROCALC? • Developed by Haverly Systems, a leader in petroleum‑process modeling. • Optimized for petroleum, chemical, and process engineers—and perfect for students in engineering courses who need a dependable petroleum calculator and oil calculator for coursework. • Works fully offline—no data connection required on‑site. • Simple, accurate, and fast: the only crude‑oil calculator and petroleum‑blending tool you’ll ever need. Download PetroCalc today and tackle every oil & gas calculation—from distillation‑curve conversions and viscosity blending to heating values—with confidence.
What’s new
Version 2.1.1 · Updated May 2, 2026
Improved reference temperature unit handling for API-to-Density calculations.
App privacy
The developer, Haverly Systems, Inc., reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Haverly's PetroCalc
Looking for apps like Haverly's PetroCalc? Here are 6 similar apps on the App Store. The highest rated is Oil & Gas Calculator : OilCalc (5.0/5), and 5 of the 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Haverly's PetroCalc | 4.7 / 5 (3 ratings) | Free | May 2, 2026 | |
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