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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 Reynolds Number

The Reynolds number (Re) is a dimensionless ratio of inertial to viscous forces in a fluid, predicting whether flow is laminar (smooth) or turbulent (chaotic).

How It Works

Re = ρvD/µ = vD/ν. Laminar: Re < 2,300. Transitional: 2,300–4,000. Turbulent: > 4,000. Turbulent flow has 4–10× higher heat transfer and pressure drop than laminar.

Reference Values & Examples

  • Blood in capillary: Re ≈ 0.001 (very laminar)
  • Water in 25 mm pipe at 1 m/s: Re ≈ 25,000 (turbulent)
  • Aeroplane wing cruise: Re ≈ 10⁷ (turbulent boundary layer)
  • Microfluidic chip channel: Re ≈ 0.1–100 (laminar — enables precise chemical mixing)

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

Using the same friction factor for all flow regimes. The Darcy friction factor in the Moody chart varies from f=64/Re (laminar) to f≈0.02 (fully turbulent, rough pipe). Using f=0.02 in laminar flow overestimates pressure drop by a factor of 10+ at Re=1,000.