Calculate hydraulic power, pressure, flow, and cylinder force quickly and accurately. This calculator provides essential calculations for hydraulic engineers and technicians.
⚡ Hydraulic Power Calculator
Calculate hydraulic power from pressure and flow rate.
Power (kW)
0.00 kW
Power (HP)
0.00 HP
🔧 Hydraulic Cylinder Force Calculator
Calculate cylinder force from pressure and diameter.
Push Force
0 N
Pull Force
0 N
💨 Flow Rate Calculator
Calculate flow rate from cylinder speed and diameter.
Flow Required
0.00 L/min
Flow Required
0.00 gpm
⚙️ Pressure & Flow Converter
Convert between pressure and flow units.
Converted Pressure
0.00
📐 Hydraulic Formulas
Power Calculation
| Formula | Units | Result |
|---|---|---|
| Power (kW) = (P × Q) ÷ 600 | P in bar, Q in L/min | Power in kilowatts |
| Power (kW) = (P × Q) ÷ 1714 | P in psi, Q in gpm | Power in kilowatts |
| Power (HP) = (P × Q) ÷ 525 | P in bar, Q in L/min | Power in horsepower |
| Power (HP) = (P × Q) ÷ 1714 | P in psi, Q in gpm | Power in horsepower |
Cylinder Force Calculation
| Formula | Units | Description |
|---|---|---|
| Push Force = P × π × D² ÷ 4 | P in bar, D in mm | Push force in Newtons |
| Push Force = P × π × D² ÷ 4 | P in psi, D in inches | Push force in pounds |
| Pull Force = P × π × (D² - d²) ÷ 4 | D = bore, d = rod | Annulus force |
Flow Rate Calculation
| Formula | Units | Description |
|---|---|---|
| Flow (L/min) = (A × v × 0.6 | A in cm², v in mm/s | Flow in L/min |
| Flow (gpm) = (A × v) ÷ 3.85 | A in in², v in in/min | Flow in gpm |
Torque for Hydraulic Motors
| Formula | Units | Description |
|---|---|---|
| Torque (Nm = (P × Vd) ÷ 20 × π | P in bar, Vd in cm³/rev | Torque in Nm |
| Torque (lbf-ft) = (P × Vd) ÷ 24 | P in psi, Vd in in³/rev | Torque in lb-ft |
🔄 Unit Conversions
Useful Conversion Factors
- Pressure: 1 bar = 14.50 psi = 0.1 MPa
- Flow: 1 gpm = 3.785 L/min
- Power: 1 kW = 1.341 HP
- Force: 1 N = 0.2248 lbf
- Length: 1 inch = 25.4 mm
- Volume: 1 L = 61.02 in³
🎯 Quick Reference: Typical Pressure and Flow
| Application | Typical Pressure | Typical Flow (per cylinder |
|---|---|---|
| Light Industrial | 100-160 bar | 20-50 L/min |
| Mobile Equipment | 160-250 bar | 50-150 L/min |
| Heavy Duty | 250-420 bar | 100-300 L/min |
| High Pressure | 420-700 bar | 30-100 L/min |
💡 Tips for Accurate Calculations
- Always use manufacturer's specifications for real-world performance
- Account for efficiency losses - typically 85-95% efficiency
- Include safety factor of 1.2-1.5x for component sizing
- Use consistent units throughout calculations
- Consider operating temperature affects oil viscosity
- Account for line losses in long pipe runs
🏭 Need Custom Hydraulic System Design
These calculators provide theoretical calculations for initial planning. For critical applications, consult Haichen Hydraulic engineers for complete system design and component selection.
What We Can Help With
- Complete hydraulic power unit design
- Component sizing and selection
- System optimization for efficiency
- Energy saving solutions
- Custom manifold design
- System performance testing
Need Engineering Assistance?
Contact Haichen Hydraulic for expert system design and component recommendations.
📧 Contact Engineering 🛠️ View ProductsLast updated: May 1, 2026 | Hydraulic Calculators by Haichen Hydraulic