Free Engineering Tool
Motor Sizing Calculator
Calculate required motor power from load parameters and get recommended standard IEC motor size with starting current and torque estimates.
Motor Selection
Motor Power Calculation
IEC Standard Motor Sizes (kW)
| Range | Available Sizes (kW) |
|---|---|
| Small | 0.37, 0.55, 0.75, 1.1, 1.5, 2.2, 3.0, 4.0 |
| Medium | 5.5, 7.5, 11, 15, 18.5, 22, 30, 37 |
| Large | 45, 55, 75, 90, 110, 132, 160, 200, 250, 315 |
Starting Current Multipliers
- DOL — 6–8× rated current
- Star-Delta — 2–3× rated (÷3 of DOL)
- Soft Starter — 2–4× rated
- VFD — 1–1.5× rated
ℹ️ Tip: Always select the next standard size above the calculated requirement. Oversizing by one step provides thermal margin and longer bearing life.
Balance motors on-site, diagnose electrical and mechanical faults.
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
