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Motor torque calculator | Full load torque of a motor

The full load torque of a motor is the maximum torque that the motor can deliver when it is fully loaded. Here is a simple motor torque calculator that can help you calculate the full load torque of a motor.

Motor torque calculator

Enter the motor rated power

Enter the motor rated speed	RPM

Result
Torque in N.m	N.m
Torque in lb.in	lb.in
Torque in lb.ft	lb.ft

How to use the motor torque calculator:

The above tool requires following data for calculation:

Motor rated power in HP or kW. (Mandatory)
Rated speed of the motor. (Mandatory)

The rated power and rated speed of the motor can be found on the nameplate of the motor. After entering the required data, click on the “Calculate” button to find out the full load torque of the motor.

Motor torque calculation

Calculation of motor torque when it is rated in kilowatts:

$Torque_(_N_._m_) =\frac{ 9549 \times P_k_W }{Rated-RPM}$

Calculation of motor torque when it is rated in horsepower:

$Torque_(_i_n_._l_b_) =\frac{ 63025 \times P_h_p}{Rated-RPM}$

$Torque_(_i_n_._f_t_) =\frac{ 5252 \times P_h_p}{Rated-RPM}$

Where,

Torque _N.m: Torque in Newton-meter.
P_kW : Power in kilowatts.
Torque _in.lb: Torque in Inch – pounds.
P_hp : Power in horsepower.
Torque _ft.lb: Torque in Feet – pounds.

Full load torque of motors @ 1500rpm

kW	HP	Torque(Nm)	Torque(lb.ft)	Torque(lb.ft)
0.75	1	4.8	42.1	3.6
1.1	1.5	10.6	94.6	7.9
1.5	2	14.4	126.1	10.6
2.2	2.9	21.1	182.8	15.3
3	4	28.7	252.1	21.1
3.7	4.9	35.4	308.9	25.8
4	5.3	38.2	334.1	27.9
5	6.6	47.8	416	34.7
7.5	10	71.7	630.3	52.6
9.3	13	88.9	819.4	68.3
10	14	95.5	882.4	73.6
11	15	105.1	945.4	78.8
15	20	143.3	1260.5	105.1
18	24	171.9	1512.6	126.1
22	29	210.1	1827.8	152.4
30	40	286.5	2521	210.1
37	49	353.4	3088.3	257.4
45	59	429.8	3718.5	309.9
55	72	525.2	4537.8	378.2
75	99	716.2	6239.5	520
90	118	859.5	7437	619.8
110	144	1050.4	9075.6	756.3
130	170	1241.4	10714.3	892.9
150	197	1432.4	12416	1034.7
175	229	1671.1	14432.8	1202.8
200	262	1909.8	16512.6	1376.1
225	295	2148.6	18592.4	1549.4
250	327	2387.3	20609.2	1717.5
275	360	2626	22689	1890.8
300	393	2864.7	24768.9	2064.1
350	458	3342.2	28865.5	2405.5
400	523	3819.6	32962.1	2746.8
450	589	4297.1	37121.8	3093.5
550	719	5252	45315	3776.2
600	785	5729.4	49474.7	4122.9

Motor torque calculator | Full load torque of a motor