Engine Calculator Plus 4+

Engine Specs Calculations


Designed for iPad

    • 2.4 • 7 Ratings
    • $2.99



Engine Calculator Plus is designed to help you figure out engine specs for all car or plane engine types from inline 4 to V12 Engine.
This calculator provides calculations for engine displacement based on either the metric or US standard system.

- User friendly UI
- Engine type selection from single cylinder to complex W16 or even custom cylinder count.
- Display 3D engine from selection
- Metric or Imperial input
- Output Engine Displacement on cc, liter and cubic inch
- Output Compression ratio of engine
- Calculate estimate horse power in HP and Kilowatts
- Include formula to calculate the engine displacement in help page
- Result are copy-able to other app

The engine's static compression ratio is easily calculated if you know six measurements or volumes:
Bore - The diameter of the cylinder bore
Stroke - The distance the piston travels in the cylinder
Deck Height - The distance between the top of the cylinder bore and the top of the piston, when the piston is at TDC (Top Dead Center, or at its highest position)
Piston top volume - If the piston is dished, domed, or dimpled, that has an affect on compression ratio.
Combustion chamber volume - How much open space is in the head above the cylinder

Compression ratios:
Higher compression ratios cylinder produces better power and fuel economy. It is not just because the charge is squeezed harder and the resulting combustion pressure goes up, but also because the higher expansion ratio allows more energy to be extracted from the original high-pressure.
High compression ratio engines burn both much more cleanly and much more efficiently than lower-compression engines. However a lower compression motor will let you run cheap fuel, but your motor won't be as efficient, less efficient and less power.

*Thanks for your support, stay tune for more update to come.

What’s New

Version 1.1

- Update for Newest Devices.
- Bug Fixed.

Ratings and Reviews

2.4 out of 5
7 Ratings

7 Ratings

Tbow367 ,

1:38 compression ratio... I don’t think so

I entered 302 specs at 4” bore 3” stroke and 8.206 deck height and it calculated at nearly 500hp and a 1:38 compression ratio..... yeah, this calculator is inaccurate, waste of money!!

Dbarr11 ,

It’s not working

It’s not working.

daseodff ,

Would like a refund

The app keeps crashing after 30 seconds of use do not use

App Privacy

The developer, Nitrio, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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