With this calculator you can convert from kVA to Amperes , it also presents the formulas (singlephase, twophase and threephase) for the conversion.
To improve understanding, examples from kVA to Amperes are explained , a table with the main equivalences and finally the steps of how to perform the calculation.
¿What is the formula for converting kVA to amps?
 I _{AC} = Amps.
 V _{LL} = LineLine Volts.
 V _{LN} = LineNeutral Volts.
 I _{AC1Ø} = Current / Amps 1 phase.
 I _{AC2Ø} = Current / Amps 2 phases.
 I _{AC3Ø} = Current / Amps 3 phases.
 S _{(kVA)} = KilovoltioAmperes.
Let’s break down the formula:
 KVA: Kilovoltamperes is the apparent power of the equipment. This is the maximum amount of power that the equipment can handle at full load. It’s important to note that KVA is different from KW (kilowatts), which is the actual power consumed by the equipment.
 Volts: This is the voltage rating of the equipment. It is the electrical potential difference between two points.
 Amps: This is the current draw in amperes. The formula calculates the maximum amount of current that the equipment will draw at full load.
So, to convert KVA to amps, you need to know the voltage and power factor of the equipment. Then, you simply divide the KVA rating by the product of the voltage and power factor. The resulting value is the maximum amount of current that the equipment will draw at full load.
How to convert from kVA into amp:
Step 1: Determine the Voltage
The first step is to determine the voltage rating of the equipment. The voltage rating is usually specified on the nameplate or in the equipment specifications. For example, let’s say that the voltage rating of the equipment is 480 volts.
Step 2: Determine the Power Factor
The next step is to determine the power factor of the equipment. The power factor is the ratio of the real power (in watts) to the apparent power (in VA). It represents the efficiency of the equipment. The power factor is usually specified on the nameplate or in the equipment specifications. For example, let’s say that the power factor of the equipment is 0.85.
Step 3: Determine the Apparent Power in KVA
The third step is to determine the apparent power in kilovoltamperes (KVA). The KVA rating of the equipment is usually specified on the nameplate or in the equipment specifications. For example, let’s say that the KVA rating of the equipment is 50 KVA.
Step 4: Use the Formula
Now that you have the voltage, power factor, and KVA rating, you can use the formula to calculate the current draw in amps. The formula is:
Amps = KVA / (Volts x Power Factor)
where:
Amps: is the current draw in amperes
KVA: is the apparent power in kilovoltamperes
Volts: is the voltage in volts
Power Factor: is the efficiency of the equipment (usually between 0.8 and 1.0)
Substituting the values we have:
Amps = 50 KVA / (480 volts x 0.85)
Amps = 65.79 amps
Therefore, the equipment will draw a maximum of 65.79 amps of current at full load.
It’s important to note that the maximum current draw calculated from the formula represents the maximum current that the equipment can handle at full load. If the equipment is not operating at full load, the actual current draw will be less than the maximum. Additionally, the actual current draw may vary due to factors such as changes in voltage or changes in the load on the equipment.
Examples of KVA to amperage calculator:
Example 1: Transformer
Suppose you have a transformer with a KVA rating of 50 and a voltage rating of 480 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x 1.732)
Amps = 50 / (480 x 1.732)
Amps = 60.61
So the transformer can deliver a maximum of 60.61 amps at 480 volts.
Example 2: Uninterruptible Power Supply (UPS)
Suppose you have a UPS with a KVA rating of 10 and a voltage rating of 120 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x 1.0)
Amps = 10 / (120 x 1.0)
Amps = 83.33
So the UPS can deliver a maximum of 83.33 amps at 120 volts.
Example 3: Generator
Suppose you have a generator with a KVA rating of 100 and a voltage rating of 240 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x 1.732)
Amps = 100 / (240 x 1.732)
Amps = 240.38
Example 4: Motor
Suppose you have an electric motor with a KVA rating of 50 and a voltage rating of 480 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x Power Factor)
Amps = 50 / (480 x 0.85)
Amps = 64.81
So the motor can draw a maximum of 64.81 amps at 480 volts with a power factor of 0.85.
Example 5: Welder
Suppose you have a welder with a KVA rating of 20 and a voltage rating of 230 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / Volts
Amps = 20 / 230
Amps = 0.087
So the welder can draw a maximum of 87 amps at 230 volts.
Example 6: Lighting System
Suppose you have a lighting system with a KVA rating of 15 and a voltage rating of 120 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x Power Factor)
Amps = 15 / (120 x 0.9)
Amps = 138.89
So the lighting system can draw a maximum of 138.89 amps at 120 volts with a power factor of 0.9.
Example 7: HVAC System
Suppose you have an HVAC system with a KVA rating of 80 and a voltage rating of 240 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x Power Factor)
Amps = 80 / (240 x 0.95)
Amps = 353.33
So the HVAC system can draw a maximum of 353.33 amps at 240 volts with a power factor of 0.95.
Example 8: Elevator
Suppose you have an elevator with a KVA rating of 30 and a voltage rating of 480 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x Power Factor)
Amps = 30 / (480 x 0.9)
Amps = 69.44
So the elevator can draw a maximum of 69.44 amps at 480 volts with a power factor of 0.9.
Example 9: Battery Charger
Suppose you have a battery charger with a KVA rating of 5 and a voltage rating of 120 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x Power Factor)
Amps = 5 / (120 x 0.8)
Amps = 52.08
So the battery charger can draw a maximum of 52.08 amps at 120 volts with a power factor of 0.8.
Example 10: Industrial Oven
Suppose you have an industrial oven with a KVA rating of 150 and a voltage rating of 480 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x Power Factor)
Amps = 150 / (480 x 0.9)
Amps = 347.22
So the industrial oven can draw a maximum of 347.22 amps at 480 volts with a power factor of 0.9.
Example 11: Water Pump
Suppose you have a water pump with a KVA rating of 40 and a voltage rating of 240 volts. To convert KVA to amperage, you can use the formula:
Amps = KVA / (Volts x Power Factor)
Amps = 40 / (240 x 0.8)
Amps = 208.33
So the water pump can draw a maximum of 208.33 amps at 240 volts with a power factor of 0.8.
kVA to amperage, chart for generator :
Generator 1 to 100kVA
A  Singlephase Amps (120V)  Singlephase Amps (240V)  Threephase Amps (208V)  Threephase Amps (240V)  Threephase Amps (480V)  Observation 
1  8.3  4.2  3.0  2.6  1.3 
Suitable for small appliances, such as lights and fans

2.5  20.8  10.4  7.5  6.5  3.3 
Suitable for small power tools, such as drills and saws

5  41.7  20.8  15  13.0  6.5 
Suitable for larger power tools, such as air compressors and welders

7.5  62.5  31.3  23  20.8  10.4 
Suitable for larger equipment, such as air conditioners and water pumps

10  83.3  41.7  30  26.0  13.0 
Suitable for larger equipment, such as air conditioners and water pumps

15  125  62.5  45  39.0  19.5 
Suitable for larger equipment, such as air conditioners and water pumps

20  167  83.3  60  52.0  26.0 
Suitable for larger equipment, such as air conditioners and water pumps

25  208  104  75  65.0  32.5 
Suitable for larger equipment, such as air conditioners and water pumps

30  250  125  90  78.0  39.0 
Suitable for larger equipment, such as air conditioners and water pumps

40  333  167  120  104.0  52.0 
Suitable for larger equipment, such as air conditioners and water pumps

50  417  208  150  130.0  65.0 
Suitable for larger equipment, such as air conditioners and water pumps

60  500  250  180  156.0  78.0 
Suitable for larger equipment, such as air conditioners and water pumps

75  625  313  225  195.0  97.5 
Suitable for larger equipment, such as air conditioners and water pumps

100  833  417  300  260.0  130.0 
Suitable for larger equipment, such as air conditioners and water pumps

Observations:
 The values in the table are based on a standard power factor of 0.8, and may
Generator 100 to 500kVA
kVA  Single Phase (240V) Amps  Three Phase (415V) Amps  Observations 
100  417  144 
A 100 kVA generator can power a small office, workshop or retail store with limited electrical demands.

125  521  180 
A 125 kVA generator is ideal for small to mediumsized industrial or commercial applications, such as data centers, hospitals, and shopping centers.

150  625  216 
A 150 kVA generator is suitable for powering medium to large industrial or commercial facilities, such as factories, office buildings, and hospitals.

200  833  288 
A 200 kVA generator is commonly used for larger facilities such as factories and commercial buildings, as well as for outdoor events and construction sites.

250  1042  360 
A 250 kVA generator is commonly used for larger facilities such as factories and commercial buildings, as well as for outdoor events and construction sites.

300  1250  432 
A 300 kVA generator can be used for a variety of applications, including powering large buildings, hospitals, and data centers.

350  1458  504 
A 350 kVA generator is suitable for powering large industrial facilities and data centers.

400  1667  576 
A 400 kVA generator can be used for large industrial facilities, large office buildings, and other highdemand applications.

500  2083  720 
A 500 kVA generator is typically used for large industrial facilities, data centers, and hospitals.

Note that these values are approximate and may vary depending on the specific application and equipment being powered by the generator. It is important to consult with a qualified electrician or generator technician to determine the appropriate generator size and capacity for your specific needs
Generator 500 to 5000kVA
kVA  Single Phase  Two Phase  Three Phase  Observations 
500  722  834  902 
This range is suitable for mediumsized buildings, factories or large households.

600  867  1001  1083 
A 600 kVA generator can provide backup power for a large commercial or industrial facility.

750  1083  1252  1354 
A 750 kVA generator can provide backup power for a hospital or data center.

800  1156  1335  1444 
A 800 kVA generator can power a small to mediumsized industrial facility.

1000  1445  1668  1805 
A 1000 kVA generator can power a large factory or manufacturing plant.

1250  1806  2085  2256 
A 1250 kVA generator can provide backup power for a large data center or hospital.

1500  2167  2502  2708 
A 1500 kVA generator can power a large industrial or manufacturing facility.

2000  2890  3336  3610 
A 2000 kVA generator can provide backup power for a large office building or shopping center.

2500  3613  4171  4512 
A 2500 kVA generator can power a small town or large facility such as an airport or stadium.

3000  4336  5005  5415 
A 3000 kVA generator can power a large industrial complex or critical infrastructure.

3500  5059  5838  6318 
A 3500 kVA generator can provide backup power for a large city or military base.

4000  5783  6671  7221 
A 4000 kVA generator can power a large metropolitan area or regional transportation hub.

4500  6506  7504  8124 
A 4500 kVA generator can provide backup power for a largescale manufacturing or production facility.

5000  7229  8337  9028 
A 5000 kVA generator can power a large city or serve as a primary source of power for a major infrastructure project.

It’s important to note that the values in this table are approximate and should be used as a general guide. The actual amperage required may vary depending on the specific equipment being powered and other factors such as the length of the cable and the temperature of the environment. It’s always best to consult with a qualified electrician or engineer to determine the exact amperage requirements for a given application.
Transformers 1 to 1000kVA
kVA  Single Phase Amps (120V)  Single Phase Amps (240V)  Three Phase Amps (208V)  Three Phase Amps (240V)  Three Phase Amps (480V)  Observations 
1  8.3  4.2  3.0  2.6  1.3 
Suitable for small electrical loads, such as lighting and appliances.

2  16.7  8.3  6.1  5.2  2.6 
Ideal for small commercial or industrial loads.

3  25  12.5  9.1  7.8  3.9 
Suitable for small motors and machinery.

5  41.7  20.8  15.2  13  6.5 
Suitable for larger motors and machinery.

10  83.3  41.7  30.3  26  13 
Ideal for large commercial or industrial loads.

15  125  62.5  45.5  39  19.5 
Suitable for larger machinery and equipment.

25  208  104  75.8  65  32.5 
Suitable for large machinery and equipment.

37.5  313  156  113  97.5  48.8 
Suitable for larger industrial loads.

50  417  208  151  130  65 
Ideal for large industrial loads.

75  625  312  227  195  97.5 
Suitable for heavy industrial loads.

100  833  417  303  260  130 
Ideal for very heavy industrial loads.

150  1250  625  455  390  195 
Suitable for large power transformers.

200  1667  833  606  520  260 
Ideal for very large power transformers.

300  2500  1250  909  780  390 
Suitable for highvoltage power transmission systems.

500  4167  2083  1515  1300  650 
Ideal for very highvoltage power transmission systems.

750  6250  3125  2273  1950  975 
Suitable for extremely highvoltage power transmission systems.

1000  8333  4167  3030  2600  1300 
Ideal for extra highvoltage power transmission systems.

Observations:
 The values in the table are approximate and may vary depending on the transformer’s efficiency and other factors.
 For singlephase loads, the amperage values are based on a voltage of 120V or 240V. For threephase loads, the amperage values are based on a voltage of 208V, 240V, or 480V.
 Transformers with higher kVA ratings are capable of handling larger electrical loads and can be used for more demanding applications.
Transformers 1000 to 5000kVA
kVA  Single Phase Amps (240V)  Two Phase Amps (240V)  Three Phase Amps (415V)  Observation 
1000  4167  4800  2889 
A 1000 kVA transformer can supply power to a smalltomediumsized commercial or industrial facility.

1250  5209  6000  3611 
A 1250 kVA transformer can supply power to a mediumsized commercial or industrial facility.

1500  6250  7200  4333 
A 1500 kVA transformer can supply power to a mediumtolargesized commercial or industrial facility.

2000  8333  9600  5778 
A 2000 kVA transformer can supply power to a largesized commercial or industrial facility.

2500  10417  12000  7222 
A 2500 kVA transformer can supply power to a largesized commercial or industrial facility.

3000  12500  14400  8667 
A 3000 kVA transformer can supply power to a largesized commercial or industrial facility.

3500  14583  16800  10111 
A 3500 kVA transformer can supply power to a largesized industrial facility.

4000  16667  19200  11556 
A 4000 kVA transformer can supply power to a largesized industrial facility.

4500  18750  21600  13000 
A 4500 kVA transformer can supply power to a largesized industrial facility.

5000  20833  24000  14444 
A 5000 kVA transformer can supply power to a largesized industrial facility or a small power substation.

Observations:
 The above table is calculated based on a 3phase system with a line voltage of 415V and a line frequency of 50Hz.
 The amperage values shown in the table are approximate and may vary slightly depending on the specific transformer’s efficiency and power factor.
 It’s essential to consider the power factor when sizing transformers for an application. A transformer with a low power factor may require a larger kVA rating to deliver the same amount of real power as a transformer with a higher power factor.
 Transformers with a kVA rating larger than 5000 are usually custombuilt and not typically available as standard offtheshelf products.
 It’s important to consult with a licensed electrician or engineer to determine the appropriate transformer size and specifications for a specific application, as there may be additional factors to consider, such as voltage drop, current overload protection, and safety regulations.
UPS 1 to 1000kVA
kVA  Voltage (V)  Amperes (A)  Observation 
1  120  8.33 
Suitable for small home appliances and electronics.

2  120  16.67 
Suitable for small office and commercial equipment.

3  120  25 
Suitable for small to medium office equipment.

5  120/208  21.7/31.2 
Suitable for medium office equipment and small data centers.

10  120/208  43.3/62.5 
Suitable for medium to large office equipment and small data centers.

15  120/208  65/93.8 
Suitable for medium to large office equipment and small data centers.

20  208/240  69.4/83.3 
Suitable for medium to large office equipment and small data centers.

30  208/240  104/125 
Suitable for large office equipment, small to medium data centers, and industrial applications.

40  208/240  138.9/166.7 
Suitable for large office equipment, medium data centers, and industrial applications.

50  208/240  173.6/208.3 
Suitable for medium to large data centers and industrial applications.

75  208/240  260.4/312.5 
Suitable for large data centers and industrial applications.

100  208/240  347.2/416.7 
Suitable for large data centers and industrial applications.

150  208/240  520.8/625 
Suitable for large data centers and industrial applications.

200  208/240  694.4/833.3 
Suitable for large data centers and industrial applications.

300  480  312.5 
Suitable for large industrial applications.

400  480  416.7 
Suitable for large industrial applications.

500  480  520.8 
Suitable for large industrial applications.

750  480  781.2 
Suitable for large industrial applications.

1000  480  1041.7 
Suitable for large industrial applications.

Observations:
 The voltage used by UPS systems may vary depending on the location and application. The table includes the most common voltages used in North America.
 The amperes listed in the table are based on a power factor of 1.0. Actual amperes may differ depending on the power factor of the load.
 UPS systems are commonly used to provide backup power for critical equipment such as servers, data centers, and industrial machinery. The appropriate kVA rating for a UPS system depends on the power requirements of the equipment being protected.
 It’s important to consider the efficiency of the UPS system when selecting the appropriate kVA rating. The efficiency of a UPS system may vary depending on the load level and design of the system.
Motors 1 to 1000kVA
kVA  Voltage (V)  Number of Phases  Amperes (A)  Real Examples 
1  120  1  8.33 
Small air compressor

1  240  1  4.17 
Small air conditioner

2  240  1  8.33 
Small electric water heater

3  208  3  8.18 
Submersible well pump

3  480  3  3.63  Industrial mixer 
5  208  3  13.9 
Large air compressor

5  480  3  6.81 
Large air conditioner

7.5  208  3  20.9 
Industrial conveyor

7.5  480  3  10.1 
Large hydraulic pump

10  208  3  27.9  Industrial blower 
10  480  3  13.6 
Industrial vacuum

15  208  3  41.9 
Large industrial mixer

15  480  3  20.5 
Industrial shredder

20  208  3  55.9 
Large industrial pump

20  480  3  27.2  Industrial chiller 
25  208  3  69.9  Industrial boiler 
25  480  3  34.0 
Large industrial fan

30  208  3  83.9 
Large industrial compressor

30  480  3  40.9 
Large industrial shredder

40  208  3  111.9 
Large industrial mixer

40  480  3  54.4 
Large industrial air compressor

50  208  3  139.8 
Large industrial water pump

50  480  3  68.0 
Large industrial fan

75  208  3  209.7 
Large industrial crane

75  480  3  101.9 
Large industrial air handler

100  480  3  144 
Centrifugal Pump

200  480  3  289  Chiller 
300  480  3  433  Conveyor 
400  4160  3  333  Crusher 
500  4160  3  416  Large Blower 
600  4160  3  500 
Large Compressor

700  4160  3  583  Large Fan 
800  4160  3  666  Water Pump 
900  4160  3  750  Large Crane 
1000  4160  3  833  Mining Shovel 
Note: These values are provided as examples and may vary depending on the specific motor and application. It is important to always consult the manufacturer’s specifications and consult with a licensed electrician when designing and installing electrical systems.