Project Engineer
Engineering Calculators
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Project Engineer is a complete engineering toolkit for iPhone and iPad: hundreds of technical calculators across the disciplines you actually use, in one clean, fast, results-focused app.
No more juggling spreadsheets, textbooks, lookup tables, and one-off websites. Enter your inputs and get clear, instantly readable results, with the theory and equations behind every answer.
INSTANT METRIC ↔ IMPERIAL
Switch any input or result between metric and imperial units with a single tap. No re-typing, no manual conversions. Every value updates on the spot.
BUILT FOR REAL ENGINEERING WORK
Project Engineer spans civil, structural, environmental, mechanical, electrical and more, for example:
- Manning's equation for pipe and open-channel flow
- Hydraulics, hydrology & stormwater
- Structural steel, reinforced concrete & connections
- Geotechnical, foundations & retaining walls
- Thermodynamics, heat transfer & fluid mechanics
- Roads, traffic & geometric design
- Electrical, building services & acoustics
- Mathematics, numerical methods & statistics
- Solar position & PV sizing
…and many more, with new calculators on the way.
SEE THE WORKING
Every calculator includes a theory section with the governing equations, variable definitions and reference sources, so you can see exactly how a result was reached and check it against your own working.
LIVE-DATA TOOLS (PREMIUM)
A standout you won't find in ordinary calculator apps: calculators that pull real-world climate and environmental data from live sources to give site-specific results, including rainwater tank sizing, irrigation demand, reservoir yield and pond-level exceedance. Turn textbook formulas into answers grounded in the real conditions at your location.
DESIGNED FOR CLARITY & SPEED
- Instant metric/imperial switching on every value
- A consistent, distraction-free layout so the answer is always front and centre
- Fast, on-device calculations
- Save your results and sync them across devices
- Mark favourites for the tools you use most
SIMPLE, FAIR PLANS
- Free: a selection of calculators to get started
- Pro: the full standard library, unlimited saved results, favourites, and cloud sync
- Premium: everything in Pro, plus live-data tools and early access to new features
WHO IT'S FOR
Practising engineers, designers, drafters, technicians, and engineering students who want dependable calculations without the clutter, at the desk or in the field.
Project Engineer is a calculation aid. Results should be checked and applied by a suitably qualified person in line with the relevant codes and standards.
Project Engineer continues to improve based on your feedback. Have a request or spotted something? Reach us anytime through the in-app contact form.
Subscriptions are auto-renewable and billed through your Apple ID; they renew unless cancelled at least 24 hours before the period ends, and you can manage or cancel anytime in your device settings.
Terms of Service: https://projectengineer.app/terms
Privacy Policy: https://projectengineer.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Solar azimuth: search for any town or suburb to set the location.
- Bernoulli and continuity: the section input is now a drop-down.
- Privacy policy updated to describe anonymous calculator usage counts and place search.
- General stability improvements.
The developer, Shaw Abrey, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shaw Abrey
- Size
- 78.1 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium (Annual) $99.99
- Premium $12.99
- Pro (Annual) $49.99
- Pro $5.99
- Copyright
- © 2026 Project Engineer