HomeCalculatorsElectricalPower & EnergyVA to kVA Calculator
Electrical calculator

VA to kVA Calculator

Convert volt-amperes (VA) to kilovolt-amperes (kVA) with the exact 1000× scale factor used on nameplates. Runs locally in your browser. Try it free.

Instant result
Result
—

Enter values to calculate.

Inputs—
Mode—
Formula—
Trust summary CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance
Input interpretation
Enter values to calculate.
Result
—
Assurance
Engineering
Declared partition coverage
PASS · 2/2 declared partitions (va-kva, invalid-domain) · Matrix
Known limitations
  • Pure scale; a=0 soft→0
  • Core CVP does not include live graph, viewport, or pointer interaction.
Model
Apparent power scaled between VA and kVA.
Scope
Same quantity; metric kilo prefix only
Verification
Engine tested · Source checked · v1.3.1 · CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· View Manifest · CVP overview · Specification
Versions
Calculation 1.3.1 · CVP protocol 1.0.0-proposed
CVP identity
4/4 property · digest 93480652bc49
Legacy regression
15/15 tests · Production surface contract 4/4
Reference
O1 model · O2 expected_values · O2 numerical_behavior
Interfaces
PASS · UI (SSR) / REST / MCP — ui-ssr is query-result HTML, not a live browser session.
Supplemental domain review
Not performed
Named expert review
Not performed
CVP suite
1/1 golden · 2/2 CVP boundary · 2/2 invalid · 4/4 property · 1/1 cross-interface · 1/1 CVP contract · Manifest
Sources
Sources
Evidence
9 legacy golden · 2 legacy boundary · legacy regression suite · 1/1 oracle-backed golden · 2/2 invalid · Artifact integrity PASS
This calculator CURRENT · Public schema 1.3.1 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓
Semantic contract
PASS
Full verification

Manifest identity, reference classes, interfaces, suite, and production records.

Formulas

Core equations used by this calculator.

VA → kVAkVA = VA ÷ 1000
kVA → VAVA = kVA × 1000
iPure unit scaling. No voltage, phase, or PF required. Small UPS and electronics often use VA; transformers and generators often use kVA.

How to use

1

Choose VA → kVA or kVA → VA

Same quantity, different scale.

2

Enter the known apparent power

No power factor, voltage, or phase needed.

3

Read the result

Updates as you type.

Example calculations

Common configurations with formula and result.

ϟ

2,500 VA

Common UPS-scale example

2500 ÷ 1000
2.5 kVA
ϟ

1,000 VA

Unit check

1000 ÷ 1000
1 kVA
ϟ

5 kVA → VA

Reverse

5 × 1000
5,000 VA
ϟ

750 VA

Small inverter

750 ÷ 1000
0.75 kVA

VA ↔ kVA quick chart

Common values at a glance.

VAkVA
500 VA0.5 kVA
750 VA0.75 kVA
1,000 VA1 kVA
1,500 VA1.5 kVA
2,000 VA2 kVA
2,500 VA2.5 kVA
5,000 VA5 kVA
10,000 VA10 kVA
25,000 VA25 kVA
100,000 VA100 kVA
i Move the decimal three places: VA → kVA divide by 1000; kVA → VA multiply by 1000.

VA to kVA calculator specification

Version 1.3.1 · Engine tested

Calculation status

Review policy · Evidence

Definition
VA and kVA both measure apparent electrical power (voltage × current, without power factor). They differ only by scale: 1 kVA = 1000 VA. Convert with kVA = VA ÷ 1000. Power factor is not used for this conversion — use it when converting to or from watts/kW.
What it calculates
Apparent power scaled between VA and kVA.
Inputs
  • Apparent power in VA or kVA
Outputs
  • Apparent power in kVA or VA
Formula
kVA = VA/1000; VA = kVA×1000
Assumptions
  • Same quantity; metric kilo prefix only
Units
  • VA ↔ kVA
Boundary conditions
  • Zero VA → 0 kVA; zero kVA → 0 VA
  • Pure scale: factor 0.001 (VA→kVA) or 1000 (kVA→VA)
  • Engine does not hard-reject negatives; physical use assumes non-negative apparent power
  • Power factor is not an input
Example
2500 VA → 2.5 kVA
Validation cases

13 published on this page · 15/15 tests · Production surface contract 4/4 · View evidence

  • 2500 VA → 2.5 kVA
  • 1000 VA → 1 kVA
  • 5 kVA → 5000 VA
  • 750 VA → 0.75 kVA
  • 2760 VA → 2.76 kVA
  • 5000 VA (2× of 2500) → 5 kVA (linear)
  • 0 VA → 0 kVA
  • 0 kVA → 0 VA
  • 6928 VA → 6.928 kVA
  • 0.5 kVA → VA → 500 VA
  • 100 kVA → VA → 100000 VA
  • 2500 VA → kVA → VA round-trip → 2500 VA
  • 2.5 kVA → VA → kVA round-trip → 2.5 kVA
Sources
Calculation version
1.3.1

Background

Interpretation and common distinctions.

Convert volt-amperes (VA) to kilovolt-amperes (kVA) — or reverse. Both measure apparent power; only the scale changes:

S(kVA) = (S(VA))/1000 S(VA) = S(kVA) × 1000

Default example: 2,500 VA → 2.5 kVA.

VA vs kVA

Unit Meaning
VA Apparent power = voltage × current (×√3 for 3φ L-L when computing from V and I)
kVA Same quantity in thousands: 1 kVA = 1000 VA
  • Small UPS, AV, and IT gear often list VA.
  • Transformers, generators, and large feeds often list kVA.

Do I need power factor?

No for VA ↔ kVA.

Conversion Needs PF?
VA ↔ kVA No
VA/kVA ↔ W/kW Yes — use watts to VA or kVA to kW

Other calculators in this family: Amps to kW Calculator, Amps to VA Calculator, Amps to Volts Calculator, Electric Power Calculator, Energy Consumption Calculator, Energy Cost Calculator, eV to Volts Calculator, kVA to Amps Calculator . Explore all Power & Energy.

→ Amps to kW Calculator Convert amps and volts to real power in kW for DC, AC single-phase, and balanced AC three-phase line-to-line. Runs locally in your browser. Free online tool — no sign-up. › → Amps to VA Calculator Convert amps and volts to apparent power in VA or kVA for single-phase and three-phase circuits. Also convert VA back to amps. Fast and free. › → Amps to Volts Calculator Solve voltage from current and resistance or power using Ohm’s law and P = V × I. Supports resistive DC and RMS AC estimates with clear formulas. › → Electric Power Calculator Calculate electrical power in watts from voltage and current for DC, single-phase AC, or balanced three-phase AC, from current and resistance, or from energy over time. › → Energy Consumption Calculator Estimate energy use in kWh from device watts and hours of operation. Useful for appliance and load planning. Runs locally in your browser. Try it free. › → Energy Cost Calculator Estimate electricity usage cost from watts/hours or kWh and your unit rate. Supports custom billing periods; standing charges and taxes are excluded. Runs locally in your browser. › → eV to Volts Calculator Relate electronvolt energy to electric potential difference through ΔE = qΔV. eV and volts measure different physical quantities. Runs locally in your browser. › → kVA to Amps Calculator Convert kVA and voltage to line current for single-phase and three-phase systems. Uses √3 for three-phase line-to-line volts. Runs locally in your browser. ›
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Frequently asked questions

Key distinctions behind the calculation.

How do I convert VA to kVA?

Divide by 1000: kVA = VA ÷ 1000. Example: 2,500 VA ÷ 1000 = 2.5 kVA.

How do I convert kVA to VA?

Multiply by 1000: VA = kVA × 1000. Example: 5 kVA × 1000 = 5,000 VA.

Do I need power factor?

No. VA and kVA are both apparent power. PF is needed only when converting to or from real power (W or kW).

What is the difference between VA and kVA?

Only the scale: 1 kVA = 1000 VA. Small equipment is often labeled in VA; larger transformers and gensets in kVA.

Is VA the same as watts?

No. Watts are real power. VA is apparent power. They match only when PF = 1. Use watts to VA or kVA to kW when PF is involved.

When should I use VA vs kVA?

Use whichever matches the nameplate. Convert freely with ÷1000 or ×1000 so ratings stay consistent across datasheets.