"Make everything as simple as

possible, but not simpler."

Albert Einstein

Free Online Calculators

Fatigue Calculator

http://www.fatiguecalculator.com - This website contains a useful set of web-based fatigue analysis software tools for computing fatigue lives of metallic machine components and structures.  The site is free to use and provides data on most steels and aluminum alloys.


Heat Transfer

http://www.thermal-wizard.com - Free online calculators that solve common heat transfer problems.  Developed and maintained by MAYA Heat Transfer Technologies.


Units Conversion

http://www.onlineconversion.com - Convert from just about any imaginable unit.


Misc. Engineering Calculators

http://www.calculatoredge.com/ -The website features hundreds of calculators for solving equations and formulas in field of Electrical, Mechanical, Chemical, Electronics, Civil, Metallurgy, Oil & Gas, Optical, Plastics, Ceramics, Physics, Maths and  more..


http://www.efunda.com/calculator.cfm - Includes a list of calculators by categories of finance, design, mechanics, and mathematics. Also includes Engineering Design Aids and a Unit Conversion Calculator


http://www.diracdelta.co.uk/ - Contains a substantial collection of online calculators related to aerodynamics, acoustics, civil engineering, electronics, mathematics, mechanical engineering, vibration, optics, physics & signal processing.


http://www.hssconnexonline.com/ - Online connection calculator for Hollow Structural Sections in structural design.


http://http://www.engineersedge.com/ - Miscellaneous enginering calculators and reference tables.


What we do

We are engineering problem solvers who can help you to:

  • Develop or improve on products
  • Reduce manufacturing costs
  • Resolve technical issues
  • Investigate and correct failure
  • Design test and validation programs
  • Comply with safety regulations
  • Support FEA and CAD functions

Our Specialties

  • Solar energy projects
  • Material handling equipment
  • Manufacturing automation
  • Specialty vehicle design
  • Transportation seating systems
  • System integration
  • Design for manufacturing
  • Functional prototypes
  • Jig and fixture design


Client Testimonials

Worldwide Laser CEO:


The excellent design and build capabilities of Proof Engineering coupled with outstanding delivery times and completion of projects ahead of schedule have greatly reduced our costs, increased levels of service and quality to our customers along with freeing internal resources allowing us to concentrate on expanding our business. I highly recommend the experts at Proof Engineering for your project requirements.

Home | Structural |Mechanical |CAD| New Product Development | Prototyping

Proof Engineering Co. | 1135 N. McQueen Rd. Suite 131 Gilbert, AZ 85233 | (480) 478-0041