Gear Pump Volume Calculator
Calculate fluid displacement quickly with a gear pump volume calculator. This tool helps you determine pump output based on dimensions and speed. Use it to improve system design, efficiency, and performance instantly.
Volume & Flow Rate Converter
How to Use Gear Pump Volume Calculator
Follow these simple steps to use the gear pump volume calculator effectively:
- Step 1: Enter Gear Dimensions: Input gear diameter, width, and tooth size (inner/root diameter). Ensure all values use consistent units (mm).
- Step 2: Input Rotational Speed (RPM): Enter the pump speed in revolutions per minute. Use actual operating speed for accurate results.
- Step 3: Enter Volumetric Efficiency: Add efficiency (usually 85%–95%). This improves real-world accuracy.
- Step 4: Click Calculate: The calculator will instantly show Volume per revolution and Flow rate (L/min or GPM).
- Step 5: Analyze Results: Use the output to select pump size, optimize system flow, and prevent overloading.
Conversion / Calculation Guide
How to calculate gear pump volume manually:
Basic Formula
Simplified Engineering Formula
Where:
- Q = Flow rate (cm³/min or L/min)
- V = Volume per revolution (cm³/rev)
- N = Speed (RPM)
Step-by-Step Example
Given: Volume per revolution (V) = 25 cm³/rev, Speed (N) = 1500 RPM.
Step 1: Multiply V × N
Q = 25 × 1500
Step 2: Calculate
Q = 37,500 cm³/min
Step 3: Convert to Liters
37,500 cm³ ÷ 1000 = 37.5 L/min
Final Answer: Flow Rate = 37.5 L/min
Note: Always adjust for efficiency losses. Actual output = Theoretical output × Efficiency.
Gear Pump Volume Conversion Chart
Common Gear Pump Volume Conversions at various speeds:
| cm³/rev | L/min @ 1000 RPM | L/min @ 1500 RPM | GPM @ 1500 RPM |
|---|---|---|---|
| 5 | 5 | 7.5 | 1.98 |
| 10 | 10 | 15 | 3.96 |
| 20 | 20 | 30 | 7.93 |
| 25 | 25 | 37.5 | 9.91 |
| 50 | 50 | 75 | 19.81 |
| 75 | 75 | 112.5 | 29.72 |
| 100 | 100 | 150 | 39.63 |
FAQs – Gear Pump Volume Calculator
A gear pump volume calculator estimates the fluid displaced per revolution and total flow rate based on pump dimensions and speed.
It helps determine flow rate, system capacity, and pump efficiency for proper system design.
Common units include cm³/rev (volume), RPM (speed), and L/min or GPM (flow rate).
Yes. Real output is lower than theoretical due to leakage and friction. Always apply efficiency (85–95%).
Yes, but fluid viscosity may affect efficiency and actual performance.
Displacement is volume per revolution. Flow rate is total volume per minute.
It provides accurate theoretical values. Actual performance depends on system conditions.
You can increase RPM, use a larger displacement pump, or improve system efficiency.
Most gear pumps operate between 85% and 95% efficiency.
A calculator saves time and reduces errors. Manual calculation helps you understand the concept.