Motor FLC or full load current or full load amperes (FLA) of a motor is the maximum current the motor windings are designed to carry. Here is a simple motor FLC calculator that can help you calculate the motor full load current.
Motor data input
Motor Type  
Enter the motor rated voltage  V 
Enter the motor rated power  
Enter the motor Efficiency  95% 
Enter the motor Power factor  0.85 
Calculated Values 

Motor FLC  A 
How to use the motor FLC calculator:
The above tool requires the following data for calculation:
 Motor Type – Singlephase or threephase. (Mandatory)
 Motorrated power in HP or kW. (Mandatory)
 Input supply voltage. (Mandatory)
 Motor Efficiency as per nameplate – (if known).
 Rated power factor (if known).
After entering the required data, click on the “Calculate” button to find out the required fuse rating, Circuit Breaker rating, contactor current rating, and overload setting.
The appropriate selection of fuses, circuit breakers, overload relays, cables, and other switchgear is necessary to protect the motor from damage. The motor full load current forms the basis for the selection of all this equipment.
Motor FLC calculation
For singlephase AC motors
For singlephase motors, when kW is known:
For singlephase motors, when HP is known:
For Threephase AC motors
For three phase motors, when kW is known:
For three phase motors, when HP is known:
Where,
 Voltage: The phasetophase voltage for a 3phase supply.
 Rating: The power rating of the motor in kW.
 Power factor (cosΦ): The rated power factor of the motor.
 Efficiency (η): The efficiency of the motor.
Approximate FLC of singlephase motors:
110V AC  220V AC  240V AC  
0.07 kW  1/12  2.4  1.2  1.1 
0.1 kW  1/8  3.3  1.6  1.5 
0.12 kW  1/6  3.8  1.9  1.7 
0.18 kW  1/4  4.5  2.3  2.1 
0.25 kW  1/3  5.8  2.9  2.6 
0.37 kW  1/2  7.9  3.9  3.6 
0.56 kW  3/4  11  5.5  5 
0.75 kW  1  15  7.3  6.7 
1.1 kW  1.5  21  10  9 
1.5 kW  2  26  13  12 
2.2 kW  3  37  19  17 
3 kW  4  49  24  22 
3.7 kW  5  54  27  25 
4 kW  5.5  60  30  27 
5.5 kW  7.5  85  41  38 
7.5 kW  10  110  55  50 
Approximate FLC of Threephase motors:
kW  HP  220V AC  240V AC  380V AC  415V AC  550V AC  660V AC  690V AC 
0.1  1/8  0.32  0.30  0.19  0.17  0.13  0.11  0.10 
0.18  ¼  0.58  0.53  0.34  0.31  0.23  0.19  0.19 
0.25  1/3  0.81  0.74  0.47  0.43  0.32  0.27  0.26 
0.37  ½  1.19  1.10  0.69  0.63  0.48  0.40  0.38 
0.56  ¾  1.81  1.66  1.05  0.96  0.72  0.60  0.58 
0.75  1  2.42  2.22  1.40  1.28  0.97  0.81  0.77 
1.1  1.40  3.55  3.26  2.06  1.88  1.42  1.18  1.13 
1.5  2  5  4  3  3  2  2  2 
2.2  3  7  7  4  4  3  2  2 
3  4  10  9  6  5  4  3  3 
3.7  5  12  11  7  6  5  4  4 
4  5  13  12  7  7  5  4  4 
5.5  7  18  16  10  9  7  6  6 
7.5  10  24  22  14  13  10  8  8 
9.3  12  30  28  17  16  12  10  10 
10  13  32  30  19  17  13  11  10 
11  14  36  33  21  19  14  12  11 
15  19  48  44  28  26  19  16  15 
18  23  58  53  34  31  23  19  19 
22  28  71  65  41  38  28  24  23 
30  38  97  89  56  51  39  32  31 
37  47  119  110  69  63  48  40  38 
45  57  145  133  84  77  58  48  46 
55  70  178  163  103  94  71  59  57 
75  95  242  222  140  128  97  81  77 
90  115  291  266  168  154  116  97  93 
110  140  355  326  206  188  142  118  113 
130  165  420  385  243  223  168  140  134 
150  191  484  444  280  257  183  161  154 
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