<p>There are numerous motor calculators on line that you can use to estimate how much power will be required to reach a particular RPM, and how much thrust that will give.</p>
<p><a href="https://www.ecalc.ch/motorcalc.php" rel="nofollow noreferrer">eCalc</a> is probably the best known, but there are several. They use standard motor equations and data from testing popular props.</p>
<p><a href="https://www.rcgroups.com/forums/showthread.php?606703-e-flight-calculators-%28compilation%29" rel="nofollow noreferrer">RCGroups keeps a list of all the calculators</a></p>

CC BY-SA 4.0
2022-03-03T16:30:17.650Z
2022-03-03T16:30:17.650Z
Robin Bennett
<p>So I am going to be running 20x5.5 carbon fibre drone propellers at 10,000 rpm maximum and I cannot find out which motor I need. I have been scouring the web for weeks and I have given up and I am sorry about that. Is there any way to find the right motor? Can you at least tell me how to search for it?</p>

<motor>
Is there a calculation to find what motor is required for a specific propeller?
leasthollow
# Is there a calculation to find what motor is required for a specific propeller?

(Asked by: username_0 on 2022-03-03)

So I am going to be running 20x5.5 carbon fibre drone propellers at 10,000 rpm maximum and I cannot find out which motor I need. I have been scouring the web for weeks and I have given up and I am sorry about that. Is there any way to find the right motor? Can you at least tell me how to search for it?

**Tags:** motor


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## 1 answers

### Answer by username_1 on 2022-03-03. Score: 2

There are numerous motor calculators on line that you can use to estimate how much power will be required to reach a particular RPM, and how much thrust that will give.

[eCalc](https://www.ecalc.ch/motorcalc.php) is probably the best known, but there are several. They use standard motor equations and data from testing popular props.

[RCGroups keeps a list of all the calculators](https://www.rcgroups.com/forums/showthread.php?606703-e-flight-calculators-%28compilation%29)


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