About Do My Calculations

DomyCalculations.com is a collection of engineering, scientific, mathematical, and practical calculators designed to show the calculation process, not only the final answer.

The website was created by Fotios Angelakis, a mechanical engineer with a background in aeronautical engineering, aircraft engines, HVAC design, energy analysis, and technical problem solving.

What DomyCalculations.com Is About

DomyCalculations.com was built to make engineering and scientific calculations easier to understand. Many online calculators only show a final result. This website focuses on tools that explain the formulas, show intermediate values, and help users understand how the result is produced.

The calculators cover topics such as fluid mechanics, thermodynamics, aerodynamics, dynamics, renewable energy, electronics, statistics, numerical analysis, construction, engines, lifestyle calculations, and physics.

The goal is to help students, engineers, technical professionals, hobbyists, and curious learners calculate, validate, and understand engineering and scientific problems faster.

Calculator Topics

The site is organized into calculator hubs. Each hub groups related tools together so users can move from broad topics to specific calculators.

Fluids Pressure drop, Moody chart, Pitot tube, flow tools. Thermodynamics Heat, energy, phase change, reaction tools. Aerodynamics Lift, stall speed, climb rate, wing tools. Dynamics Torque, center of gravity, motion, mechanics. Energy Solar, U-value, heating cost, energy planning. Electronics Voltage divider, antennas, circuits, RF tools. Statistics Probability, Markov chains, risk, EOQ, game theory. Numerical Analysis Matrices, Gauss-Seidel, ODEs, algorithms. Physics Relativity and advanced physics calculators. Construction Soil, grout, gabions, STC, repair, crop tools. Engines Gear ratios, speed, wear, automotive tools. Lifestyle Practical everyday and home setup tools.

Why These Calculators Are Different

Step-by-step focus

Many calculators are designed to show formulas, assumptions, intermediate values, and explanations so users can learn instead of only copying an answer.

Engineering background

The tools are created from an engineering mindset, with attention to practical assumptions, units, input validation, and educational clarity.

Useful for learning

Students can use the calculators to check homework, understand formulas, and compare manual results with web-based calculations.

Useful for early estimates

Engineers and technical users can use the calculators for quick checks, scenario comparisons, and early-stage planning before detailed design.

Custom Calculators and Engineering Studies

Beyond free calculators, DomyCalculations.com can support custom technical calculations, engineering calculators, Python-based simulation tools, and project-specific analysis.

Work can include energy analysis for buildings, power cost estimation, heating cost studies, HVAC-related calculations, heat pump comparisons, geothermal energy checks, techno-economic studies, and custom web calculators for specialized engineering workflows.

For a project-specific calculation or engineering study, send the available project data, assumptions, and goal to sales@domycalculations.com.
Contact for custom calculations View custom solutions

About Fotios Angelakis

I’m Fotios Angelakis, a mechanical engineer with a master’s degree focused on aeronautical engineering and aircraft engines. My professional background includes HVAC design for large-scale projects, energy-related calculations, and experience connected with the oil and gas industry.

I built DomyCalculations.com because I believe technical knowledge should be easier to access, understand, and apply. The site is meant to help people learn the method behind a calculation and not only get a number.

You can connect with me on LinkedIn: Fotios Angelakis on LinkedIn.

Important Accuracy and Safety Note

The calculators on this website are educational and estimation tools. They are useful for learning, checking, comparing scenarios, and making early calculations.

Do not use these calculators as the sole basis for safety-critical engineering, aviation, construction, electrical, medical, legal, financial, code-compliance, or professional design decisions. Real projects require verified data, standards, local rules, and qualified professional review.