EngineCalc

Name: EngineCalc
Price: 0.99 USD
Rating: 3 (4 reviews)
Author: iTrinity, Inc.

Engine Builder's Calculator

Only for iPhone

$0.99 · Designed for iPhone. Not verified for macOS.

4 Ratings
Age Rating

4+
Years
Category

Utilities
Developer

iTrinity, Inc.
Language

EN
+ 3 More
Size

13.6
MB

iPhone

The complete toolkit for engine builders. 18 calculators, 13 unit converters, instant search. Formulas shown. 100% offline, no account needed. EngineCalc is the essential toolkit for engine builders, mechanics, and motorsport enthusiasts. Whether you're building a street rod, a race engine, or modifying a performance vehicle, EngineCalc puts the math at your fingertips — with the formula shown for every calculation so you always understand exactly what's happening under the hood. CALCULATORS Piston • Piston Speed — mean piston velocity from RPM and stroke • Compression Ratio — from cylinder and chamber volumes • Rod Ratio — connecting rod length to stroke relationship • Rod Length — from block length, stroke, and deck clearance • Piston Dome Volume — dome cc needed to hit a target compression ratio • Compression Height — wristpin height from deck clearance and stroke • Cylinder Displacement — total displacement from bore, stroke, and cylinder count Power • Simple Horsepower — quick HP from RPM and torque • Torque — from horsepower and RPM • Horsepower — using MEP, displacement, compression ratio, and VE • Corrected BHP — sea-level horsepower adjusted for altitude • BHP Loss — how much power elevation costs you • Volumetric Efficiency — actual vs. theoretical airflow • Theoretical Volume Flow — maximum CFM at a given RPM • Actual Volume Flow — real-world CFM with volumetric efficiency Fuel • Air Density — available oxygen from altitude and temperature • Mass Flow — air mass moving through the engine per minute • BSFC — brake specific fuel consumption and engine efficiency UNIT CONVERSIONS Thirteen categories covering every unit an engine builder needs: Torque • Pressure • Power • Volume • Temperature • Length • Mass Speed • Force • Fuel Efficiency • Frequency • Energy • Angle Type a value in any unit and all others update instantly. Categories you use most rise to the top automatically. FEATURES • Search — jump straight to any calculator by name • Metric and Standard measurement systems — switch anytime, values convert automatically • Formulas displayed for every calculator — no black boxes • Results shown with units, and shareable to any app or message • Result history — your last stored values for each calculator • Built-in guide — contextual help for calculators and conversions, available anytime • Works completely offline — no account, no subscription, no data collected

Ratings & Reviews

3.0

out of 5

4 Ratings

Great but easily could be better
01/14/2011
Chumma7
Love this ap in terms of concept and ease of use. It's an engine designers dream to have this in their hands. I only wish there was a way to work with metric units. Inches seem to be the only option.
Great but easily could be better
01/14/2011
Chumma7

Love this ap in terms of concept and ease of use. It's an engine designers dream to have this in their hands. I only wish there was a way to work with metric units. Inches seem to be the only option.
Nice
Sep 25
TJSartain
Looks like all the old bugs have been fixed and the new conversions are pretty helpful.
Nice
Sep 25
TJSartain

Looks like all the old bugs have been fixed and the new conversions are pretty helpful.
Keeps Crashing
08/14/2019
Braden S.
I tap on various parameters to fill them in and it just keeps crashing. So hasn't proved usable. Also there doesn't seem to be any way to save or share the information so once you leave the app you lose your work. Annoying. iPhone 6s.
Keeps Crashing
08/14/2019
Braden S.

I tap on various parameters to fill them in and it just keeps crashing. So hasn't proved usable. Also there doesn't seem to be any way to save or share the information so once you leave the app you lose your work. Annoying. iPhone 6s.
Needs to be updated
09/27/2019
Fish_763
This could be a really good app. It is laid out very well easy to use and switches between Eng/Metric without loosing data. Biggest issue is the app crashes when entering data as you move around the app. Then you are always starting over, I was never able to test the power calculations to see how accurate they are. Disappointed to say the least. I will be looking for updates, hopefully soon. This was test on IOS 12.4.1 September 2019
Needs to be updated
09/27/2019
Fish_763

This could be a really good app. It is laid out very well easy to use and switches between Eng/Metric without loosing data. Biggest issue is the app crashes when entering data as you move around the app. Then you are always starting over, I was never able to test the power calculations to see how accurate they are. Disappointed to say the least. I will be looking for updates, hopefully soon. This was test on IOS 12.4.1 September 2019

EngineCalc 2.0: search your calculators instantly, share results in one tap, usage-sorted unit conversions, and an on-demand help guide. Dozens of bug fixes and stability improvements under the hood.

Version 2.0 Sep 24

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

Information

Seller: iTrinity, Inc.
Size: 13.6 MB
Category: Utilities
Compatibility: Requires iOS 26.0 or later.

iPhone
Requires iOS 26.0 or later.

Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.

Apple Vision
Requires visionOS 26.0 or later.
Languages: English and 3 more

English, German, Japanese, Spanish
Age Rating: 4+

4+

Learn More