About CalcEngineer
I'm Evgenii Konkin, founder of CalcEngineer.
I'm a product builder. I've been in tech since 2016, with a couple of running products before this — a Webinar platform and a VPN service. CalcEngineer is what I'm focused on now.
Why I started this
I find new projects by looking at spaces where the tools feel stuck in time. Search Google for almost any engineering calculation and the top results look like 2008 — text walls, broken on mobile, no result interpretation, no way to save or share work, no respect for how engineers actually work today.
That's a UX problem, not an engineering problem. UX problems are what I know how to solve.
CalcEngineer started in late 2025 as an experiment. Today it covers HVAC and Electrical with 160+ calculators. Nine more disciplines are queued up.
What CalcEngineer is — and isn't
CalcEngineer is software. Calculators apply standard formulas from published sources — ASHRAE Handbook, NEC (NFPA 70), IEEE, ASME, manufacturer documentation. Each calculator names the formula it uses and the standard it's drawn from.
CalcEngineer is not engineering consultancy. I don't give engineering advice, I don't certify designs, and the site doesn't replace a licensed Professional Engineer. These are screening tools — quick design checks, ballpark sizing, field value verification, learning. For production design or code submission, you need a P.E. and project-specific review. That note is on every calculator page, not just here.
The framing is deliberate. The engineering belongs to the standards bodies and the licensed engineers who apply them. My part is making the calculation faster to access and easier to read.
How the calculators are built
Three things on every calculator page:
A defined formula from a published standard, cited on the page.
A clear input model — realistic ranges, metric and imperial, plain explanations of what each variable is and where it comes from.
A readable result — number plus units, interpretation, a worked example, and links to calculators engineers tend to use alongside it.
I'm looking for a licensed Professional Engineer to come on as Technical Reviewer for editorial oversight. Until that's in place, calculators are built directly against published standards, and I read every email at support@calcengineer.com — corrections from the engineering community get a personal reply.
What's coming
Premium PDF export — for client reports and project records. Live, expanding.
Saved calculation history — for repeat use across projects.
API access — for engineering firms wanting calculations inside their own tools.
Nine more disciplines — Structural, Fluid Mechanics, Mechanical, Plumbing, Manufacturing, Process, Construction, Environmental, Engineering Safety. Through 2026.
Company
CalcEngineer is operated by PIXELTIDE LLC, 833 Saint Vincent, Irvine, CA 92618, USA.
Questions, corrections, partnerships, feedback: support@calcengineer.com.