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Mechanical engineering converters

For engines, structures and machine shops: torque, stress and strain, gears, threads, surface finish, sheet metal and more.

25 converters

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Torquea torque wrench dial from jar lids to locomotives
- N·m → lb·ft
- lb·ft → N·m
- N·m → lb·in
Thrustfrom a model rocket to Starship
- kN → lbf
- lbf → kN
- kN → kgf
Spring ratea spring squashing under a 10 kg weight
- N/mm → lbf/in
- lbf/in → N/mm
- N/m → N/mm
Elastic modulushow far a bar of it stretches
- GPa → Mpsi
- Mpsi → GPa
- GPa → ksi
Strainmicrostrain to percent
- µε → %
- % → µε
- µε → mm/m
Second moment of areathe square beam that would match it
- mm⁴ → in⁴
- in⁴ → mm⁴
- cm⁴ → in⁴
Gear tooth sizethe wheel a 20-tooth gear would make
- DP → m
- m → DP
- m → CP (mm)
Thread pitchthe distance between one thread and the next
- TPI → mm
- mm → TPI
- TPI → in
Vibrationyour machine from smooth to shaking itself apart
- mm/s → in/s
- in/s → mm/s
- mm/s → µm/s
Surface roughnessyour finish against a human hair
- µm Ra → µin Ra
- µin Ra → µm Ra
- µm Ra → N
Corrosion ratehow long your wall thickness lasts
- mpy → mm/yr
- mm/yr → mpy
- mm/yr → µm/yr
Engine poweryour engine in horsepower
- N·m → kW
- kW → N·m
- lb·ft → hp
Power-to-weightcyclists, hatchbacks and Formula One
- hp/t → W/kg
- W/kg → hp/t
- hp/t → kW/t
Fuel consumptionthe efficiency behind that figure
- g/kWh → lb/hp·h
- lb/hp·h → g/kWh
- g/kWh → %
Sheet metal gaugewhat a square meter of it weighs
- ga → mm
- mm → ga
- ga → in
Torsional stiffnessthe torque to twist it a quarter turn
- N·m/deg → N·m/rad
- N·m/rad → N·m/deg
- lb·in/deg → N·m/deg
Fracture toughnessthe crack size that becomes critical
- MPa·√m → ksi·√in
- ksi·√in → MPa·√m
- MPa·√m → Pa·√m
Etch ratehow long a 100 nm layer takes
- nm/min → Å/s
- Å/s → nm/min
- nm/min → µm/min
Welding heat inputthe travel speed that gives it
- kJ/mm → kJ/in
- kJ/in → kJ/mm
- kJ/mm → J/mm
Coating weightthe thickness on each side of a sheet
- g/m² → µm
- µm → g/m²
- g/m² → oz/ft²
Linear mass densityfrom a cable to a railway rail
- kg/m → lb/ft
- lb/ft → kg/m
- lb/yd → kg/m
Metal hardness (HRC, HB, HV)HRC 58 is about 653 HV
- HRC → HV
- HV → HRC
- HRC → HB
Cutting speed and RPM300 SFM on a 10 mm cutter is 2,900 rpm
- SFM → rpm
- rpm → SFM
- m/min → rpm
Section modulus10 in³ is 164 cm³
- in³ → cm³
- cm³ → in³
- in³ → mm³
Engine displacementa 350 is 5.7 liters
- ci → L
- L → ci
- cc → ci

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