Unit Converters

Length, Pressure, Speed & O-Ring calculations

📏Length

mm—

cm—

m—

inches—

feet—

🔧Pressure

bar—

psi—

MPa—

kPa—

atm—

⚡Speed / Velocity

m/s—

m/min—

ft/s—

ft/min—

km/h—

🌡️Temperature

°C—

°F—

K—

🔩Torque

N·m—

ft·lb—

in·lb—

kg·cm—

💪Force

N—

kN—

lbf—

kgf—

🔵Durometer (Shore)

Approximate — empirical conversion tables (ASTM D2240)

Shore A—

Shore D—

Shore 00—

🪞Surface Finish (Ra)

Rz ≈ 4×Ra · Rq ≈ 1.25×Ra (Gaussian dist.) · Rt ≈ 6×Ra

Ra µm—

Ra µin—

Rz µm (≈)—

Rq / RMS µm (≈)—

Rt µm (≈)—

ISO N-grade (≈)—

🔄Shaft Speed — RPM ↔ Surface Velocity

RPM → Surface Speed

Shaft Dia.

RPM RPM

m/s—

m/min—

ft/min—

Surface Speed → RPM

Shaft Dia.

Surface Speed

RPM—

⭕O-Ring Calculator

Stretched Length → Inside Diameter

Stretched Length

Cross-Section

Stretch % %

Inside Diameter → Stretched Length

Inside Diameter

Cross-Section

Stretch % %