Convert Torque from Ounce-inches to Centinewton-meters (ozf-in to cNm)

Ounce-inch to Centinewton-meter Conversion Formula

Example

Let's convert 5 Ounce-inch (ozf-in) to Centinewton-meter (cNm).

Using the formula:

Therefore, 5 Ounce-inch (ozf-in) is equal to 3.5307759999225961905 Centinewton-meter (cNm).

How many ounce-inches are in one centinewton-meter? One Centinewton-meter (cNm) contains 1.4161192893883987621 Ounce-inches (ozf-in) — the inverse of the factor above. Multiplying by 0.7061551999845192381 takes you from ounce-inches to centinewton-meters; multiplying by 1.4161192893883987621 brings you back.

Put in words: one ounce-inch equals 0.7061551999845192381 centinewton-meters, so the ounce-inch is the smaller unit of this pair. Converting between them never changes the amount of torque being measured — only the size of the unit you count it in.

What Is an Ounce-inch (ozf·in)?

An ounce-inch (ozf·in) is one ounce-force applied at one inch from the axis — the smallest of the common imperial torque units.

• 1 lbf·in = 16 ozf·in
• 1 lbf·ft = 192 ozf·in
• 1 ozf·in = 0.00706155 N·m

The Unit of Small Motors

Ounce-inches exist because small electric motors produce tiny torques that would be unreadable in pound-feet. A stepper motor rated at 0.35 lbf·ft is far more naturally described as 67 ozf·in, and that is how manufacturers publish it.

If you are choosing a stepper or servo for a 3D printer, CNC machine or robot, the datasheet holding-torque figure will almost certainly be in ozf·in or in N·cm.

Where Ounce-inch Is Used

• Stepper and servo motors — holding torque and detent torque ratings.
• Small gearmotors in appliances, printers and automation.
• Watchmaking and instrument work — miniature screws.
• Torque testing of caps, closures and small assemblies.

Converting Ounce-inch

What Is a Centinewton-meter (cN·m)?

A centinewton-meter (cN·m) is one hundredth of a newton-meter — a metric SI-prefixed unit for very small torques.

• 1 cN·m = 0.01 N·m
• 1 N·m = 100 cN·m

Why Such a Small Unit

Some torques are genuinely tiny. A spectacle hinge screw, a watch case back or a miniature connector may need a fraction of a newton-meter. Writing 8 cN·m is clearer and safer on a specification than 0.08 N·m, where a missing zero changes the value tenfold.

Because centi is a plain SI prefix, the conversion is exact and involves no measurement standard — just a shift of the decimal point.

Where Centinewton-meters Are Used

• Precision instruments and optics — small retaining screws.
• Electronics assembly — miniature terminal screws and board standoffs.
• Watchmaking and eyewear.
• Torque screwdriver ratings in the sub-newton-meter range.

Converting Centinewton-meter

Ounce-inch to Centinewton-meter Conversion Table

Here are some quick reference conversions from Ounce-inch (ozf-in) to Centinewton-meter (cNm):