VA to kVA Calculator
Convert apparent power between VA, kVA, and MVA instantly — both ways, with the full three-unit matrix. Pure SI prefix scaling: no power factor needed, no voltage needed.
Apparent-power converter
Enter a value, pick the units, get every equivalent. 1 kVA = 1,000 VA · 1 MVA = 1,000 kVA = 1,000,000 VA.
| Unit | Equivalent value | Full name |
|---|---|---|
| VA | 1,500 | volt-amperes |
| kVA | 1.5 | kilovolt-amperes |
| MVA | 0.0015 | megavolt-amperes |
1. The formulas (all of them)
Apparent power uses plain SI prefixes, so every conversion is a single multiply or divide. There is nothing else to know — no power factor, no voltage, no current.
Read the ladder either way: moving right multiplies, moving left divides. That is the entire converter above, in one line — whether you need va to kva, kva to va, mva to kva, or kva to mva.
2. VA vs watts vs kVA — the honest version
This is where most people get tripped up, so here it is plainly: VA, kVA, and MVA are the same quantity (apparent power) at different scales. Watts are a different quantity (real power). Converting between the two groups is not a unit conversion — it needs one more fact: the power factor.
| Quantity | Units | What it measures | Convert with this tool? |
|---|---|---|---|
| Apparent power | VA · kVA · MVA | Total current × voltage the circuit, UPS, or generator must carry | Yes — that is all this page does |
| Real power | W · kW · MW | The part of the power that actually does work | No — needs power factor: W = VA × PF |
| Reactive power | VAR · kVAR | Power that oscillates between source and load without doing work | No — different quantity entirely |
3. Worked examples
Every number below is produced by the converter engine above — type the inputs in and you will get the same results.
Example A — UPS nameplate: 1500 VA → kVA
A typical home-office UPS is sold as "1500 VA". In kilovolt-amperes that is 1.5 kVA — the same capacity, friendlier number. Power-factor note: at a 0.8 output PF this unit delivers 1500 × 0.8 = 1200 W of real power.
Example B — Standby generator: 225 kVA → VA
Commercial standby generators are quoted in kVA. A 225 kVA unit carries 225,000 VA of apparent power — useful when you are adding up many small VA loads to see if they fit.
Example C — Substation transformer: 2.5 MVA → kVA → VA
Grid equipment lives in MVA because the numbers are huge. One 2.5 MVA transformer equals 2,500 kVA — roughly eleven 225 kVA standby generators' worth of apparent power.
Example D — Small UPS: 750 VA → kVA
Sub-1 kVA ratings are common for desk UPS units and wall adapters. 750 VA = 0.75 kVA; there is nothing wrong with the decimal — kVA is just the tidier way to write it.
4. UPS and generator sizing context
Manufacturers quote backup equipment in VA/kVA because the rating is about current-carrying capacity, which does not depend on your loads' power factor. Typical ratings, converted:
| Equipment | Nameplate | = in VA | = in kVA |
|---|---|---|---|
| Desk UPS | 500 VA | 500 | 0.5 |
| Home-office UPS | 1500 VA | 1,500 | 1.5 |
| Server UPS | 3000 VA | 3,000 | 3 |
| Rack UPS | 5000 VA | 5,000 | 5 |
| Portable generator | 3.3 kVA | 3,300 | 3.3 |
| Portable generator | 6.5 kVA | 6,500 | 6.5 |
| Standby generator | 45 kVA | 45,000 | 45 |
| Standby generator | 225 kVA | 225,000 | 225 |
| Standby generator | 500 kVA | 500,000 | 500 |
| Substation transformer | 2.5 MVA | 2,500,000 | 2,500 |
5. Related tools and scope boundaries
This page does exactly one job — pure SI prefix scaling of apparent power (VA ↔ kVA ↔ MVA). No power factor, no voltage, no current involved. If your problem needs any of those, you want a different tool:
✓ This tool — VA to kVA calculator
Apparent-power unit scaling only. Enter 1500 VA, get 1.5 kVA. Nothing else is computed, and nothing else is needed.
Watts to VA calculator
When power factor is involved: W ↔ VA via PF, kVA = kW ÷ PF, a power-factor lab, and a UPS/generator sizer. If your question mentions watts, start there.
Power unit converter
The real-power hub: W, kW, MW, hp, BTU/h, dBm and more — no VA/kVA apparent-power units. For everything measured in watts, use this one.
6. Frequently asked questions
What is the formula to convert VA to kVA?
Divide volt-amperes by 1,000: kVA = VA ÷ 1000. One kilovolt-ampere is exactly one thousand volt-amperes, so 1500 VA ÷ 1000 = 1.5 kVA. The reverse is just as simple: VA = kVA × 1000, so 225 kVA × 1000 = 225,000 VA. This converter does the arithmetic instantly in both directions.
How do I convert kVA to VA?
Multiply by 1,000: VA = kVA × 1000. For example, a 225 kVA generator is rated for 225 × 1000 = 225,000 VA. That is the same physical quantity — only the prefix changes, exactly like converting kilometers to meters.
What is an MVA and how do I convert it to kVA?
MVA means megavolt-amperes: 1 MVA = 1,000 kVA = 1,000,000 VA. Utility-scale equipment — substation transformers, grid feeders — is rated in MVA because the numbers would be unwieldy otherwise. Example: a 2.5 MVA transformer = 2.5 × 1000 = 2,500 kVA = 2,500,000 VA.
What is the difference between VA and kVA?
Nothing except scale: VA, kVA, and MVA all measure apparent power. The prefixes are pure SI: k (kilo) = ×1,000 and M (mega) = ×1,000,000. Converting between them never changes the underlying power, just like converting grams to kilograms never changes the mass.
Is VA the same as watts?
No. VA measures apparent power — the total current × voltage a circuit must carry. Watts measure real power — the part that actually does work. They are linked by power factor: watts = VA × power factor. A 1500 VA UPS with a 0.8 power factor delivers 1500 × 0.8 = 1200 W.
Can I convert VA to watts without knowing the power factor?
Honestly, no. VA-to-watts is not a unit conversion — it needs the power factor of the load or source, because watts = VA × PF. A nameplate 1000 VA device might deliver anywhere from 600 W (PF 0.6) to 1000 W (PF 1.0). This tool only rescales VA, kVA, and MVA; for the power-factor math use our watts-to-VA calculator.
How many kVA is a 1500 VA UPS?
1.5 kVA — simply 1500 ÷ 1000. That tells you the UPS current-carrying capacity in friendlier units, but it does not tell you the wattage: at a typical 0.8 output power factor the same UPS delivers 1500 × 0.8 = 1200 W. Always size loads against the watts rating, not the VA rating.
Why are generators rated in kVA and transformers in MVA?
Because those ratings describe apparent power — the total electrical load the machine can carry regardless of the load's power factor. Generators are typically sold from a few kVA (portable) to thousands of kVA (standby); grid transformers handle so much power that MVA keeps the numbers readable. The rating convention does not change the physics: 1 kVA = 1000 VA everywhere.
What size generator do I need in kVA?
First add up your loads in VA — which, if you only know watts, means dividing by each load's power factor (VA = watts ÷ PF) and adding a 20–25% headroom margin — then convert the total to kVA here by dividing by 1000. Example: 180,000 VA of load ÷ 1000 = 180 kVA, so you would shop for a 200 kVA or larger unit. The power-factor step matters: use our watts-to-VA calculator for it.
How do I find the kVA rating on a nameplate?
UPS and generator nameplates list apparent power directly as VA or kVA — look for VA, kVA, or MVA next to the model number. If it only shows watts, you cannot derive kVA from that number alone; you need the power factor (watts ÷ PF = VA). Server UPS units often print both: for example 1500 VA / 1200 W.
Does converting VA to kVA change the actual power?
No. Unit conversion only relabels the same quantity — 225 kVA and 225,000 VA are the same generator, just as 2 km and 2000 m are the same road. What does change real power delivery is power factor, which is a property of the load, not of the units.
What is 1 kVA in VA, watts, and amps?
1 kVA = 1000 VA exactly. In watts it depends on power factor: 1000 VA × PF, so 800 W at PF 0.8 or 1000 W at PF 1.0. In amps it depends on voltage: amps = 1000 × kVA ÷ volts (single-phase), so 1 kVA at 230 V is about 4.35 A. Only the VA figure is fixed; watts need PF and amps need voltage.
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