πŸ“– New to this tool? Read the step-by-step guide β†’

πŸ”§ 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
β†’
6.895 bar
1 atm
β†’
760 Torr
100 N
β†’
22.48 lbf
1000000 Pa
β†’
1 MPa
10 Nβ‹…m
β†’
7.376 lbβ‹…ft
10 m/s
β†’
32.81 ft/s
1000 kg/mΒ³
β†’
62.43 lb/ftΒ³
0.001 mΒ³/s
β†’
15.85 GPM
Engineering Categories
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Pressure

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

Nβ‹…m ↔ ftβ‹…lbf inβ‹…lbf ↔ kgfβ‹…m dNβ‹…m ↔ ozβ‹…in
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Stress

Pa ↔ PSI MPa ↔ ksi GPa ↔ Msi
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Force

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

Nβ‹…m ↔ ftβ‹…lbf kNβ‹…m ↔ ftβ‹…kip
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Flow Rate

mΒ³/s ↔ GPM L/min ↔ CFM L/s ↔ ftΒ³/min
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Velocity

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

m/sΒ² ↔ ft/sΒ² g ↔ m/sΒ² g ↔ ft/sΒ²
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Density

kg/mΒ³ ↔ lb/ftΒ³ g/cmΒ³ ↔ oz/inΒ³ kg/L ↔ lb/gal
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Viscosity

Paβ‹…s ↔ cP mΒ²/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 / Ξ·_pump. Motor power: P_motor = P_shaft / Ξ·_motor. Total efficiency: Ξ·_total = Ξ·_pump Γ— Ξ·_motor (typically 0.55–0.75).

Reference Values & Examples

  • Q=0.01 mΒ³/s, H=20 m, Ξ·=0.65: P_shaft = 1000Γ—9.81Γ—0.01Γ—20/0.65 = 3.02 kW
  • 10 L/s at 15 m head, 60% efficient: P = 10Γ—15Γ—9.81/0.6 = 2.45 kW
  • Doubling flow rate increases power by ~8Γ— (pump laws: P ∝ QΒ³)

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 β€” determining whether flow is laminar or turbulent β€” 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 β€” 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.