Cube FPV

FPV Motor Volume Comparisons

You’re looking to replace your motors with a similar size motor or motor with similar power. This is the page for you. The chart below compares common motor sizes according to their volume, which roughly equates to motor power.

Why Volume?

For FPV motors, the stator volume is a very good indicator of the motor’s strength (power). This is quite handy if you want to compare the theoretical power potential of two different motors of different sizes. Remember, motors have not only a width but also a height, so it’s not always as straight forward linear increase in power from one diameter to the next size up. Different motor stator heights greatly affect the stator volume.   

Calculating Volume?

In the interest of not overly complicating the matter, when we calculate volume, we disregard the volume taken up by the motor shaft and bearings. Well all similar size motors will have a similar size shaft and bearings, and to measure these we need to pull the motor apart, so we just look at the motor specifications of diameter and height.
For example, a 2207 size motor has a stator diameter of 22mm and a stator height of 7mm. We calculate it’s volume like this.

Motor Shape

So volume roughly equates to power, but the shape of the motor (the ratio of its width to height) affects the motor’s characteristics. Generally a taller, narrower motor will spin-up faster as well as slowing down faster – it’s more responsive. But cooling may be an issue. On the other end of the scale, a pancake style motor will be less responsive and some may say smoother with its delivery of power. It will also have better cooling.

Motor Volume Comparisons

This chart and the related bar graph below show motor sizes ranked according to stator volume. If you are searching for a replacement motor of similar strength, then look at the motors either side of your motor size. But keep in mind the shape of the motor you are replacing – tall or pancake style.

MotorDiameterHeightVolume
322032.0020.016085
312031.0020.015095
321532.0015.012064
311531.0015.011322
281628.0016.09852
281428.0014.08621
311031.0010.07548
281228.0012.07389
301030.0010.07069
281028.0010.06158
300830.008.05655
280928.009.05542
280828.008.04926
2807.528.007.54618
310631.006.04529
280728.007.04310
2806.528.006.54002
2408.524.008.53845
280628.006.03695
240824.008.03619
250725.007.03436
2208.522.008.53231
220822.008.03041
250625.006.02945
2207.522.007.52851
240624.006.02714
2306.523.006.52701
2306.523.006.52701
220722.007.02661
2107.521.007.52598
230623.006.02493
2206.522.006.52471
250525.005.02454
210721.007.02425
2305.523.005.52285
220622.006.02281
240524.005.02262
2106.521.006.52251
2205.522.005.52091
210621.006.02078
230523.005.02077
2006.520.006.52042
2105.521.005.51905
220522.005.01901
200620.006.01885
2304.523.004.51870
210521.005.01732
2005.520.005.51728
2204.522.004.51711
230423.004.01662
1806.518.006.51654
200520.005.01571
2104.521.004.51559
180618.006.01527
220422.004.01521
1607.516.007.51508
2303.523.003.51454
2004.520.004.51414
160716.007.01407
1805.518.005.51400
210421.004.01385
2203.522.003.51330
1408.514.008.51308
1606.516.006.51307
180518.005.01272
200420.004.01257
230323.003.01246
150715.007.01237
140814.008.01232
160616.006.01206
1407.514.007.51155
1506.515.006.51149
1804.518.004.51145
220322.003.01140
140714.007.01078
150615.006.01060
180418.004.01018
1406.514.006.51001
1505.515.005.5972
140614.006.0924
150515.005.0884
1207.512.007.5848
1405.514.005.5847
160416.004.0804
1604.516.004.0804
1504.515.004.5795
120712.007.0792
140514.005.0770
1206.512.006.5735
150415.004.0707
1603.516.003.5704
1404.514.004.5693
120612.006.0679
1205.512.005.5622
1106.511.006.5618
140414.004.0616
160316.003.0603
110611.006.0570
120512.005.0565
1105.511.005.5523
1204.512.004.5509
110511.005.0475
1303.513.003.5465
120412.004.0452
1104.511.004.5428
130313.003.0398
1203.512.003.5396
110411.004.0380
120312.003.0339
1103.511.003.5333
110311.003.0285
1202.512.002.5283
1102.511.002.5238
100310.003.0236
120212.002.0226
1002.510.002.5196
110211.002.0190
803.58.003.5176
100210.002.0157
8038.003.0151
802.58.002.5126
8028.002.0101
7027.002.077
MotorVolumeChart04