swap_horiz Looking to convert 1.7A at 480V back to watts?

How Many Amps Is 1,201 Watts at 480V?

1,201 watts at 480V draws 1.7 amps per line on an AC three-phase circuit at PF 0.85. Reactive or motor loads at the same real power draw more current than the resistive figure because of the power-factor penalty.

At 1.7A, the NEC 210.19(A) continuous-load sizing math (125% of the load, equivalently 80% of the breaker rating) points to a 15A breaker as the smallest standard size that covers this load continuously. At 480V, the lower current draw allows smaller wire and breakers compared to 120V.

1,201 watts at 480V

1.7 Amps

1,201 watts equals 1.7 amps at 480 volts (AC three-phase L-L, PF 0.85)

DC2.5 A

AC Single Phase (PF 0.85)2.94 A

Try: 1,200W at 480V 1,300W at 480V 1,100W at 480V 1,400W at 480V

Watts

Volts

Amps (3Φ, PF 0.85)

1.7

Assumes an AC three-phase L-L circuit at PF 0.85. Typing a commercial L-L voltage (208/400/480V) re-routes the result to three-phase; 277V stays on single-phase because it's the L-N lighting leg of a 480Y/277V wye; 12/24V re-routes to DC.

Formulas

DC: Watts to Amps

I_(A) = P_(W) ÷ V_(V)

1,201 ÷ 480 = 2.5 A

AC Single Phase (PF = 0.85)

I_(A) = P_(W) ÷ (PF × V_(V))

1,201 ÷ (0.85 × 480) = 1,201 ÷ 408 = 2.94 A

AC Three Phase (PF = 0.85)

I_(A) = P_(W) ÷ (√3 × PF × V_L-L), where V_L-L is the line-to-line voltage

1,201 ÷ (1.732 × 0.85 × 480) = 1,201 ÷ 706.66 = 1.7 A

Circuit Sizing

Breaker Sizing

NEC 240.6(A) standard ampere ratings for branch-circuit and feeder breakers start at 15, 20, 25, 30, 35, 40, 45, and 50A and continue at 60A and above for feeder and large-appliance circuits. At 1.7A, the smallest standard breaker the raw current fits under is 15A. NEC 210.19(A) sizes conductor and OCP at 125% of any continuous load, equivalently 80% of breaker rating. Final selection still depends on the equipment nameplate, whether the load is continuous, conductor ampacity, and local code.

Breaker Size	Max Continuous Load (80%)	Status for 1.7A
15A	12A	OK for continuous
20A	16A	OK for continuous
25A	20A	OK for continuous
30A	24A	OK for continuous
35A	28A	OK for continuous
40A	32A	OK for continuous
45A	36A	OK for continuous
50A	40A	OK for continuous

Energy Cost

Running 1,201W costs approximately $0.20 per hour at the US average rate of $0.17/kWh (rates last reviewed April 2026). That is $1.63 for 8 hours or about $49.00 per month. See detailed cost breakdown.

AC Conversion Detail

The DC baseline for 1,201W at 480V is 2.5A. On an AC circuit with a power factor of 0.85, the current rises to 2.94A because reactive current flows alongside the real-power current. On a three-phase circuit at 480V the same 1,201W of total real power is carried by three line conductors at 1.7A each (total real power = √3 × 480V × 1.7A × 0.85). Each line sees the lower per-line current, but the total power is not divided across the phases, it is the sum of the three line currents operating in phase balance.

Circuit Type	Formula	Result
DC	1,201 ÷ 480	2.5 A
AC Single Phase (PF 0.85)	1,201 ÷ (480 × 0.85)	2.94 A
AC Three Phase (PF 0.85)	1,201 ÷ (1.732 × 0.85 × 480)	1.7 A

Power Factor Reference

Power factor is the main reason 1,201W draws more current on AC than DC. At PF 1.0 (pure resistive, like a heater), the load pulls 1.44A at 480V on the three-phase L-L basis the rest of the page uses. At PF 0.80 (typical induction motor), the same 1,201W pulls 1.81A. That is an extra 0.3611A just to overcome the reactive component. Use the typical values below as a starting point, not for precise engineering calculations.

Load Type	Typical PF	1,201W at 480V (three-phase L-L)
Resistive (heaters, incandescent)	1	1.44 A
Fluorescent lamps	0.95	1.52 A
LED lighting	0.9	1.61 A
Synchronous motors	0.9	1.61 A
Typical mixed loads	0.85	1.7 A
Induction motors (full load)	0.8	1.81 A
Computers (without PFC)	0.65	2.22 A
Induction motors (no load)	0.35	4.13 A

Same Wattage, Other Voltages

bolt1,201W at 12V = 100.08ADC bolt1,201W at 24V = 50.04ADC bolt1,201W at 100V = 12.01A1Φ, PF 1.0 bolt1,201W at 120V = 10.01A1Φ, PF 1.0 bolt1,201W at 208V = 3.92A3Φ per line, PF 0.85 bolt1,201W at 220V = 5.46A1Φ, PF 1.0 bolt1,201W at 230V = 5.22A1Φ, PF 1.0 bolt1,201W at 240V = 5A1Φ, PF 1.0 bolt1,201W at 277V = 4.34A1Φ, PF 1.0 bolt1,201W at 400V = 2.04A3Φ per line, PF 0.85 bolt1,201W at 460V = 1.77A3Φ per line, PF 0.85 bolt1,201W at 575V = 1.42A3Φ per line, PF 0.85

swap_horiz 1.7A to watts at 480V payments 1,201W running cost electrical_services 1.2 kW to amps science Ohm's law: 480V & 2A functions Watts to amps formula

Other Wattages at 480V

Watts	AC 3Φ Amps per line, PF 0.85	DC / Resistive Amps
350W	0.4953A	0.7292A
400W	0.566A	0.8333A
450W	0.6368A	0.9375A
500W	0.7075A	1.04A
600W	0.849A	1.25A
700W	0.9906A	1.46A
750W	1.06A	1.56A
800W	1.13A	1.67A
900W	1.27A	1.88A
1,000W	1.42A	2.08A
1,100W	1.56A	2.29A
1,200W	1.7A	2.5A
1,300W	1.84A	2.71A
1,400W	1.98A	2.92A
1,500W	2.12A	3.13A
1,600W	2.26A	3.33A
1,700W	2.41A	3.54A
1,800W	2.55A	3.75A
1,900W	2.69A	3.96A
2,000W	2.83A	4.17A

Frequently Asked Questions

How many amps is 1,201W at 480V? expand_more

1,201W at 480V draws 1.7 amps on AC three-phase L-L at PF 0.85. For comparison at the same voltage: 2.5A on DC, 2.94A on AC single-phase at PF 0.85, 1.7A on AC three-phase at PF 0.85. Actual current depends on the load's power factor.

How much does 1,201W cost to run per hour? expand_more

At the US residential average of $0.17/kWh (last reviewed April 2026), 1,201W costs $0.20 per hour and $1.63 for 8 hours. Rates vary by utility and time of day.

Why does a 1,201W resistive heater draw fewer amps than a 1,201W motor at 480V? expand_more

Resistive loads like space heaters and toasters have a power factor of 1.0, so 1,201W at 480V on a three-phase L-L (per line) basis draws 1.44A. An induction motor at the same wattage has a PF around 0.80, drawing 1.81A on the same basis. The extra current is reactive, it does no real work but still has to flow through the conductors and breaker.

What power factor should I use for 1,201W calculations? expand_more

For resistive loads (heaters, incandescent bulbs, electric kettles) use PF 1.0. For motors, use 0.80. For mixed office/residential use 0.85. For computers and LED arrays the effective PF can be 0.65 or lower. Power factor only applies to AC.

Why does AC draw more amps than DC for 1,201W? expand_more

AC circuits with reactive loads have a power factor below 1.0, so they draw extra current. At PF 0.85, 1,201W at 480V draws 2.94A instead of 2.5A (DC). That is about 18% more current for the same real power.

This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.