Estimated current
Divides apparent power in VA by single-phase voltage.
Enter apparent power in kVA and single-phase voltage to estimate line current.
For a single-phase estimate, amps = kVA x 1,000 / voltage. This formula uses apparent power in volt-amperes.
Divides apparent power in VA by single-phase voltage.
Converts kVA to VA.
Restates the entered supply voltage.
Convert kVA to VA by multiplying by 1,000, then divide by the single-phase voltage. For example, 2.4 kVA at 240 V gives an estimated 10 A. kVA is apparent power, so power factor is not needed for this specific apparent-current relationship.
Do not apply this single-phase result to a three-phase system. Three-phase current depends on line-to-line voltage and uses a square-root-of-three relationship. Confirm whether the kVA and voltage on an equipment document refer to single-phase or three-phase operation.
This page does not select conductor size, breaker size, or transformer capacity. Equipment duty, continuous-load treatment, starting current, overcurrent protection, temperature, and local rules are separate design questions. Have a qualified electrician review electrical work.
| Input | What it means | Planning note |
|---|---|---|
| kVA | Apparent power in kilovolt-amperes | Use the equipment or scenario value. |
| Voltage | Single-phase supply voltage | Confirm the system configuration first. |
| VA | kVA multiplied by 1,000 | Apparent, not necessarily real, power. |
| Amps | Estimated line current | Not a circuit-design determination. |
Translate a stated single-phase kVA value into current.
Compare current at different supply voltages.
Understand VA, voltage, and current relationships.
For a single-phase calculation, 2,400 VA divided by 240 V is 10 A.
Not for this apparent-power formula. Power factor is needed when converting between real watts or kW and apparent power.
No. Three-phase current uses a different relationship and line-to-line voltage.
No. A qualified electrician must assess the full installation and applicable requirements.
Last reviewed: October 4, 2026. Electrical estimates are educational planning tools, not installation instructions. A qualified electrician must verify conductor, protection, voltage drop, grounding, equipment, and local code requirements.
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