Engineering CalculatorsCalculators and tools for engineers.
High-accuracy, first-principles engineering calculators for EV powertrain and power electronics design — full derivations, cited standards, and a client-ready PDF on every result.
Designed for engineering teams building the future.
Accurate by design
Every calculator uses documented, citable formulas — no black-box results, ever.
Save time
Skip the spreadsheet rebuild — get a full derivation and a client-ready PDF in minutes.
Built with trust
Each result is checked against a published textbook or standard worked example.
Continuously improved
New calculators and guides ship regularly, covering more of the EV powertrain stack.
Every answer comes with its derivation.
No calculator on Volteq just hands you a number. Each one shows the full step-by-step calculation and is checked against a published worked example from the governing standard — IEC, ISO, IPC, VDI, or a recognized reference text — with a "Validated:" note on the result. Export the whole thing to a client-ready PDF.
Every discipline. Every stage.
Volteq is purpose-built for one vertical: EV powertrain and power electronics design — not adapted from a generic mechanical-engineering toolbox. 23 calculators across six disciplines, with more shipping regularly.
Explore all calculators →Electrical
Busbar, cable sizing, creepage & clearance, PCB traces, harnesses.
Power Electronics
SiC/MOSFET loss, DC-link capacitors, CM/DM choke sizing.
Motors
Torque/power/speed, Id/Iq field-oriented control.
Battery
Pack series/parallel voltage, capacity, and sag under load.
Thermal
Heatsink Rth budgets, heat exchanger sizing via effectiveness-NTU.
Mechanical
Beams, bolted joints, bolt patterns, fits, O-rings, Mohr's circle.
The calculation is always free. Premium adds the rest.
- ✓ PDF export with your company's branding
- ✓ Save and reload calculations
- ✓ Every advanced / custom-input mode
- ✓ Full standards reference tables
- ✓ PDF export with your company's branding
- ✓ Save and reload calculations
- ✓ Every advanced / custom-input mode
- ✓ Full standards reference tables
- ✓ PDF export with your company's branding
- ✓ Save and reload calculations
- ✓ Every advanced / custom-input mode
- ✓ Full standards reference tables
Ready to engineer better?
The calculation is always free, with no paywall on the math. Create a free account to save your inputs and pick up where you left off.