About the VA to Amps Calculator
This calculator converts VA to A. VA is volt-amperes, the apparent power that a supply must deliver, which is voltage times current without regard to power factor, and A is amperes, the flow of electric current. The current is the apparent power divided by the voltage, and by √3 for three-phase. Enter your figures and the answer appears at once, together with a few related values, and you can copy the result with one tap. The sums are done in your browser and nothing is sent anywhere.
Updated October 2026
How to use the VA to Amps Calculator
- 1Enter the value in VA.
- 2Fill in the other boxes that the VA to A calculation needs, such as time, voltage or power factor.
- 3Read the answer in the large result box.
- 4Check the extra rows for related values.
- 5Press Copy result to keep it.
When you need VA to A
UPS units, small transformers and power supplies are rated in VA. To know what current they draw, divide the rating by the voltage. This is how you check whether a socket circuit can carry the unit, and whether several units fit on the same breaker.
The tool also handles three-phase supplies, where the formula includes the square root of three. Use the voltage between two lines for the sum, and read the answer as the current in each line.
How the VA to A sum works
Single-phase: amps = VA ÷ volts. Three-phase: amps = VA ÷ (√3 × volts). A 1,000 VA UPS on a 120 V supply draws up to 1,000 ÷ 120 = 8.33 A.
The displayed answer is rounded to six significant figures, but the sum itself is not rounded, so converting VA to A and back again gives you the number you started with.
- Use the maximum VA for breaker sizing
- Three-phase uses the line voltage
- VA, not watts, drives the current
Mistakes to avoid when converting VA to A
The VA rating gives the largest current the unit can draw at the stated voltage. A UPS rarely draws that much, because the load is usually lower than the rating. But for sizing breakers and wiring, the full figure is the right one.
On phone and computer
On a phone, type in the boxes one after another and read the A result underneath; the Copy button puts it on the clipboard for a message or a note. On a computer the inputs sit on the left and the answer on the right, so you can change one figure and watch the A value move. The VA to A page works the same on both. For larger loads, kVA to Amps Calculator and Amps to kVA Calculator use thousands of volt-amps. VA to Watts Calculator gives real power, and Voltage Drop Calculator checks cable runs.
Features
- VA to A in one step
- Related values shown with the answer
- Clear messages for impossible inputs
- Copy the result with one tap
- Private: nothing is uploaded
- Works on phone and computer
Frequently asked questions
How do I convert VA to A?
Single-phase: amps = VA ÷ volts. Three-phase: amps = VA ÷ (√3 × volts). A 1,000 VA UPS on a 120 V supply draws up to 1,000 ÷ 120 = 8.33 A.
What is the formula for VA to A?
Single-phase: amps = VA ÷ volts. Three-phase: amps = VA ÷ (√3 × volts). The calculator applies it exactly and rounds only the displayed answer.
What is the difference between VA and A?
VA is volt-amperes, the apparent power that a supply must deliver, which is voltage times current without regard to power factor. A is amperes, the flow of electric current. They measure different things, which is why converting from VA to A needs more than a simple multiplication in some cases.
How many amps is 1,500 VA at 230 V?
1,500 ÷ 230 = 6.52 A on a single-phase supply.
Is VA the same as watts for this sum?
No, but for current you use VA, not watts, because the wires carry the apparent power. Using watts would underestimate the current when the power factor is low.
Is this VA to A calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so the figures you type are not uploaded or stored. It is meant for planning and learning; for wiring or safety work, check the result against your equipment's rating plate and local rules.