Torque
τ = F × r
Stress
σ = F / A
Gear Ratio
GR = Ndriven/Ndriver
Power
P = τ·ω
Surface Pressure
p = F / A
RPM → Speed
v = π·D·n/60
Belt Speed
v = π·D·n/60
Length Converter
mm ↔ cm ↔ m ↔ in ↔ ft
Fast calculators for design checks—clean UI, clear results.
τ = F × r
σ = F / A
GR = Ndriven/Ndriver
P = τ·ω
p = F / A
v = π·D·n/60
v = π·D·n/60
mm ↔ cm ↔ m ↔ in ↔ ft