The Shopena Supply torque conversion calculator helps you switch between different torque units quickly. It's a great reference when selecting a torque screwdriver, as not all specifications are displayed in the units you need. Torque refers to a turning force that results in rotation. It’s calculated by multiplying the applied force by the distance from the rotation point, which is why it’s expressed in units like lbf.ft, combining force and length. With this torque calculator you can convert measurements between various units, whether you're going from ozf.in to lbf.ft, ozf.in to kgf.cm, or other combinations.
Torque Conversion Calculator
Types of torque units:
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Newton-meter (Nm)
- SI (metric) unit of torque
- Represents the torque resulting from a one-newton force applied perpendicularly at a distance of one meter from the pivot point.
- Commonly used in engineering and automotive industries.
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Kilogram-meter (kg·m)
- Metric unit, not SI-standard
- Represents the torque from a one-kilogram force acting at a one-meter radius.
- Often used in some older technical manuals or specific regions.
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Pound-foot (lb·ft or ft·lb)
- Imperial/US customary unit
- Represents the torque produced by a one-pound force acting perpendicularly at one foot from the pivot point.
- Widely used in the United States, especially in automotive and mechanical contexts.
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Pound-inch (lb·in)
- Same as lb·ft, but with the force applied one inch from the pivot.
- Useful for smaller torque applications like electronics, small machinery, etc.
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Ounce-inch (oz·in)
- Very small unit of torque, with an ounce of force applied one inch from the pivot.
- Often used in precision equipment or electronics like servo motors.
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Dyne-centimeter (dyn·cm)
- CGS (centimeter-gram-second) system unit of torque
- One dyne of force applied one centimeter from the axis.
- Rarely used today; more historical/scientific than practical.
Downloadable Torque Conversion Chart:
Click here to download the chart
Torque FAQ:
What exactly is torque?
Torque is rotational force, the product of force and distance from the pivot, measured in newton-metres (N·m) or pound-feet (lbf-ft).
Why are there multiple torque units?
Metric industries use N·m; US markets favour lbf-ft and lbf-in; electronics often cite ozf-in or cN·m. Converting keeps specs consistent worldwide.
How do I convert between N·m, lbf-ft, and lbf-in?
1 N·m ≈ 0.73756 lbf-ft ≈ 8.85075 lbf-in. The calculator above performs all common conversions instantly.
How accurate are torque tools and when should they be calibrated?
Quality tools run ±3–6 %. Calibrate every 5 000 cycles or 12 months, whichever comes first.
Does an extension bar or crow-foot affect torque?
Yes. Adding length changes the lever arm; apply the correct factor or use a built-in table to maintain accuracy.
Can temperature impact torque readings?
Extreme heat or cold alters lubricant viscosity and tool internals, causing drift. Re-calibrate or compensate outside 10–35 °C.
Click, dial, digital, or rotary transducer—what’s the difference?
Click tools give an audible “click”; dial shows a live needle; digital displays numbers and stores data; transducers capture real-time torque for QA.
What happens if I over- or under-torque fasteners?
Over-torque can strip threads or shear bolts; under-torque lets joints loosen and vibrate apart. Always follow the manufacturer’s spec.