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🔧 Konvertibly Engineering Calculator

Professional engineering calculations for pressure, torque, stress, force, and more. Precision tools for engineers and technical professionals.

Conversion Result

Common Engineering Calculations
100 PSI
→
6.895 bar
1 atm
→
760 Torr
100 N
→
22.48 lbf
1000000 Pa
→
1 MPa
10 N⋅m
→
7.376 lb⋅ft
10 m/s
→
32.81 ft/s
1000 kg/m³
→
62.43 lb/ft³
0.001 m³/s
→
15.85 GPM
Engineering Categories
⚡

Pressure

PSI ↔ Bar Pascal ↔ ATM kPa ↔ Torr MPa ↔ PSI
🔧

Torque

N⋅m ↔ ft⋅lbf in⋅lbf ↔ kgf⋅m dN⋅m ↔ oz⋅in
📐

Stress

Pa ↔ PSI MPa ↔ ksi GPa ↔ Msi
💪

Force

N ↔ lbf kN ↔ kip dyne ↔ oz kgf ↔ lbf
⚖️

Moment

N⋅m ↔ ft⋅lbf kN⋅m ↔ ft⋅kip
🌊

Flow Rate

m³/s ↔ GPM L/min ↔ CFM L/s ↔ ft³/min
🚀

Velocity

m/s ↔ ft/s km/h ↔ mph ft/min ↔ m/min
📈

Acceleration

m/s² ↔ ft/s² g ↔ m/s² g ↔ ft/s²
🎯

Density

kg/m³ ↔ lb/ft³ g/cm³ ↔ oz/in³ kg/L ↔ lb/gal
🌀

Viscosity

Pa⋅s ↔ cP m²/s ↔ cSt poise ↔ cP

About Pump Power

Calculates the hydraulic power required to pump a fluid, and the shaft power needed from the motor accounting for pump efficiency.

How It Works

Hydraulic power: P_hydraulic = ρgQH (W). Shaft power: P_shaft = P_hydraulic / η_pump. Motor power: P_motor = P_shaft / η_motor. Total efficiency: η_total = η_pump × η_motor (typically 0.55–0.75).

Reference Values & Examples

  • Q=0.01 m³/s, H=20 m, η=0.65: P_shaft = 1000×9.81×0.01×20/0.65 = 3.02 kW
  • 10 L/s at 15 m head, 60% efficient: P = 10×15×9.81/0.6 = 2.45 kW
  • Doubling flow rate increases power by ~8× (pump laws: P ∝ Q³)

Common Applications

  • Pipe and duct system design
  • Pump and fan selection
  • HVAC and process engineering
  • Hydraulic machinery sizing
  • Chemical and environmental engineering projects

Did You Know?

The Reynolds number — determining whether flow is laminar or turbulent — was derived by Osborne Reynolds in 1883 using dye injected into glass pipes. His original experimental apparatus is still on display at the University of Manchester.

Common Mistake

Sizing a pump at exactly the required duty point. Pump efficiency falls at off-design flows — a pump sized right at BEP (best efficiency point) operates poorly if system resistance varies. Select pump so normal duty is 80–110% of BEP flow.