Engine Calculator Plus 1.1

Nitrio ❘ Commercial ❘
iOS
out of 7 votes

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Engine Calculator Plus is a tool created to assist users in determining engine specifications for various types of car or aircraft engines, ranging from inline 4 to V12 configurations.

This calculator offers computations for engine displacement based on both the metric and US standard systems.

User-friendly interface
Selection of engine type, including single cylinder, complex W16, or custom cylinder counts
Display of a 3D engine representation based on selection
Metric or Imperial input options
Outputs engine displacement in cc, liters, and cubic inches
Calculates compression ratio of the engine
Estimates horsepower in HP and Kilowatts
Inclusion of formula for engine displacement calculation in the help section
Results can be copied to other applications

The static compression ratio of an engine can be easily determined once you have information on six specific measurements or volumes:

Bore - The cylinder bore diameter
Stroke - The distance the piston travels within the cylinder
Deck Height - The space between the top of the cylinder bore and the top of the piston at TDC
Piston top volume - Variances in piston design can impact compression ratio
Combustion chamber volume - The amount of open space in the head above the cylinder

A higher compression ratio within a cylinder results in enhanced power and fuel efficiency. This is achieved not only through increased charge compression and combustion pressure but also due to the higher expansion ratio that allows for more energy extraction from the initial high pressure.

Engines with high compression ratios burn fuel cleaner and more efficiently compared to those with lower compression ratios. While a lower compression engine permits the use of cheaper fuel, it sacrifices efficiency and power output.

Overview

Engine Calculator Plus is a Commercial software in the category Business developed by Nitrio.

The latest version of Engine Calculator Plus is 1.1, released on 09/05/2024. It was initially added to our database on 09/05/2024.

Engine Calculator Plus runs on the following operating systems: iOS.

Users of Engine Calculator Plus gave it a rating of 2 out of 5 stars.

Pros

Wide range of engine types supported (single cylinder up to complex layouts like W16 and custom cylinder counts)
Metric and Imperial (US Standard) input support
Calculates engine displacement and outputs in cc, liters, and cubic inches
Calculates static compression ratio when required measurements/volumes are provided
Provides estimated horsepower in HP and kilowatts
Includes formulae/explanations in the help page (useful for learning/verification)
3D engine visualization based on selection (helps with understanding configuration)
Results are copyable to other apps (easy export/share)
Small app download size (around 2.4 MB)
Paid app (one-time purchase) — no subscription required

Cons

Multiple user reports of crashes and instability (app reportedly crashes within ~30 seconds for some users)
User reviews cite inaccurate calculations (examples include implausible compression ratios and horsepower estimates), raising concerns about reliability for engineering use
Last noted updates appear to be several years old (2018–2020), suggesting limited recent maintenance or new-feature development
Limited platform availability — appears targeted/designed for iPad/iOS only (no Android or desktop versions indicated)
Developer contact/support information on the site is minimal (contact page content sparse), which may make troubleshooting or reporting bugs difficult
No clear mention of thorough validation or testing of calculation algorithms (which is important for technical accuracy)
Small app size and minimal metadata may indicate limited feature depth compared with more comprehensive engine-design tools
Some reviewers report the app is unusable or not working on their device — possible compatibility issues with certain iOS versions/devices
No visible release notes detailing fixes for reported calculation inaccuracies (minor bug-fix notes provided but without detail)
No explicit privacy/data-use details visible in the app listing or contact page (may be a concern for some organizations)

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