Marcus Thorne, P.E.
Principal Engineer at ApexConverter — 22 years in practice. Load paths, unit-consistent physical calculation, tolerance stack-up and the safety factors that separate a calculation from a specification.
On this profile. ApexConverter publishes reviewer profiles so every methodology claim on the platform is attributable. The monogram above is a design element, not a photograph: we do not publish portraits, and we make no claim to any regulatory registration or licence. What we do claim is stated below and is verifiable against the engines themselves.
Background
Marcus reviews the construction, engineering and physics engines. Twenty-two years of practice inform a strict rule applied across the platform: an engineering result is an estimate for planning, never a substitute for a stamped design.
Areas of expertise
- Professional Engineer
- Structural and mechanical analysis
- Materials and load modelling
Review standard applied
Physical engines carry explicit units at every step and state the assumptions under which the governing equation holds.
Engines reviewed by Marcus Thorne
Every calculator below carries this reviewer's name and is re-checked each review cycle.
Construction
- Concrete Calculator
- Concrete Slab Calculator
- Concrete Footing Calculator
- Concrete Column Calculator
- Concrete Stairs Calculator
- Rebar Calculator
- Gravel Calculator
- Sand Calculator
Engineering
- Beam Deflection Calculator
- Beam Load Calculator
- Bending Stress Calculator
- Shear Stress Calculator
- Moment Calculator
- Section Modulus Calculator
- Column Buckling Calculator
- Bolt Torque Calculator
Physics
- Force Calculator
- Work Calculator
- Power Calculator
- Energy Calculator
- Kinetic Energy Calculator
- Potential Energy Calculator
- Momentum Calculator
- Impulse Calculator
Editorial independence
ApexConverter sells nothing, takes no commission and runs no affiliate links on its calculators. Every engine executes entirely in your browser, so no figure you enter is transmitted, logged or sold. That is the whole business model, and it is why a reviewer here has no commercial reason to prefer one answer over another.
Corrections and methodology questions: admin@apexconverter.com.