Use the Propeller Calculator to estimate speed, pitch, or RPM based on propeller specs. Perfect for boats, drones, aircraft, and RC applications.
Propeller Results
Propeller Performance Guide
| Application | Typical Thrust (N) | Typical RPM |
|---|---|---|
| Air – Drone | 5–50 | 8000–20000 |
| Air – RC Plane | 10–100 | 6000–15000 |
| Water – Inboard | 1000–10000 | 1000–3000 |
| Water – Outboard | 500–5000 | 2000–6000 |
| Water – Sterndrive | 800–8000 | 1500–4000 |
Note: Results are theoretical. Actual performance depends on design and conditions. Consult test data for precise results.
Propeller Calculator – Find Your Perfect Propeller Setup in Seconds
Take the guesswork out of your setup! Use our Propeller Calculator to determine the best propeller size and pitch for your boat, drone, RC plane, or mechanical project — based on speed, power, and RPM inputs.
What is a Propeller Calculator?
A Propeller Calculator is a precision tool that helps you calculate:
- Optimal propeller pitch
- Estimated speed (knots or mph)
- RPM efficiency
- Thrust estimation (for drones or aviation)
It uses your inputs — like shaft RPM, gear ratio, pitch, and diameter — to give you ideal performance settings for any rotating blade system.
Whether you’re boating, flying, or building, this calculator helps you maximize performance, fuel efficiency, and thrust.
How to Use the Propeller Calculator
Using this tool is simple:
- Enter your RPM, pitch, diameter, and gear ratio
- Select your units (metric/imperial)
- Click “Calculate”
- Instantly view your speed, slip, and efficiency output
🎯 No registration, no math formulas — just fast results.
Why Use Our Tool?
| 🔹 Feature | 🚀 Benefit |
|---|---|
| Accurate Calculations | Built on standard prop formulas |
| Supports All Applications | Boats, drones, planes, etc. |
| Real-Time Results | No waiting or reloads |
| Easy to Use | Simple inputs, clear output |
| Free & Online | Access it from any device, anywhere |
Who Should Use It?
This calculator is perfect for:
- 🚤 Boat owners optimizing speed or fuel usage
- 🛩️ Drone builders tuning flight stability
- 🧑🔧 RC hobbyists upgrading prop size or motor
- ⚙️ Engineers modeling mechanical thrust systems
Example Inputs
- RPM: 4800
- Gear Ratio: 1.5:1
- Pitch: 21 inches
- Propeller Diameter: 13 inches
🔎 The calculator will give you estimated speed (mph or knots), prop slip %, and overall efficiency.
FAQs
What is prop slip?
It’s the difference between theoretical and actual travel distance per propeller rotation. Our calculator helps minimize this for better speed.
Can I use this for RC planes or drones?
Yes. It works for any propeller-driven system.
Is the calculator free to use?
Yes. It’s 100% free and always online — no sign-up required.