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Motor Starting Current Calculator — DOL, Star-Delta & Starter Comparison

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Full-load current (A) Prefer nameplate or verified design current.DOL / locked-rotor multiple (× FLA) Use motor-specific data where available.Line voltage (V) Line-to-line for three-phase.Supply Starting method

Calculated result

240 A starting current

DOL locked-rotor estimate: 240 A

Selected method: Direct-on-line

Selected-method current: 6 × FLA

Starting apparent power: 172.51 kVA

Use manufacturer/nameplate LRA or code-letter data instead of an assumed multiplier when available.

Show the working

1. DOL estimate = 40 A × 6 = 240 A.
2. DOL starting current = 240 A.
3. Starting kVA = √3 × 415 × 240 ÷ 1000 = 172.512 kVA.

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