Single-Phase kVA to Amps Calculator

Quick explanation

Convert apparent power (kVA) into current when voltage is known. For inverse conversion use amps to kVA, and compare practical load checks with watts to amps. For the step-by-step formula, see the how to convert kVA to amps guide.

Apparent power (kVA) Voltage (volts)

Estimated current: 20.833 A

How to convert single-phase kVA to amps

To convert apparent power in kilovolt-amps (kVA) to current in amps (A), you need voltage and phase assumptions. kVA and amps do not measure the same quantity, so there is no direct one-number conversion without voltage.

This calculator applies the single-phase formula only. If you need three-phase conversion, use a dedicated three-phase calculator.

How to convert

Single-phase formula

Phase current in amps equals 1000 times apparent power in kVA divided by RMS voltage.

A = (1000 × kVA) / V

amps = (1000 × kVA) / volts

Worked examples

Question: What is current for 3 kVA at 110 V single phase?

Solution: A = (1000 × 3) / 110 = 27.27 A

Question: What is current for 7.5 kVA at 240 V single phase?

Solution: A = (1000 × 7.5) / 240 = 31.25 A

Common mistakes and notes

This page is single-phase only.
Do not use line-to-line or line-to-neutral three-phase formulas on this calculator.
These are planning estimates and can differ from measured current.

Assumptions

REVIEW: Uses simplified single-phase estimate A = (kVA x 1000) / V.
Three-phase and power factor adjustments are not included.
Always validate against service specs and local electrical code.

Worked example

Example: 7.5 kVA at 240 V = 31.25 A.

FAQ

How do you convert kVA to amps?

Use A = (kVA x 1000) / V for a single-phase estimate.

How many amps is 5 kVA at 240 V?

About 20.833 A using A = 5000 / 240.

Why might field values differ?

Power factor, phase type, and voltage variation can change actual current.

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⚠️ Sanity Check Only

This tool provides informational estimates only. It is not professional engineering advice. Electrical work is dangerous and governed by strict local codes.

Before you start:

Verify these results with a licensed electrician.
Cross-reference with the latest Electrical Code (NEC/CEC).
Never work on live circuits.