TORQUE FACTS
Torque Conversion
Common Torque Abbreviations
Foot Pounds – ft. lbs.
Inch Pounds – in. lbs.
Inch Ounces – in. ozs.
Newton Meter – Nm
Centi-Newton Meter – cNm
Meter Kilogram – Mkg
Easy-to-use Torque Conversion Table
| To Convert From |
To |
Multiply by |
| in. oz. |
in. lb. |
0.0625 |
| in. lb. |
in.oz. |
16 |
| in. lb. |
ft.lb. |
0.08333 |
| in. lb. |
cmkg |
1.1519 |
| in. lb. |
mkg |
0.011519 |
| in. lb. |
Nm |
0.113 |
| in. lb. |
dNm |
1.13 |
| ft. lb. |
in. lb. |
12 |
| ft. lb. |
mkg |
0.1382 |
| ft. lb. |
Nm |
1.356 |
| dNm |
in. lb. |
0.885 |
| dNm |
Nm |
0.10 |
| Nm |
dNm |
10 |
| Nm |
cmkg |
10.2 |
| Nm |
mkg |
0.102 |
| Nm |
in. lb. |
8.85 |
| Nm |
ft. lb. |
0.7376 |
| cmkg |
in. lb. |
0.8681 |
| cmkg |
Nm |
0.09807 |
| mkg |
in. lb. |
86.81 |
| mkg |
ft. lb. |
7.236 |
| mkg |
Nm |
9.807 |
Formula for Calculating Addition of an Adapter to a Torque Wrench
| Formula: |
|
|
|
| Length (L) = |
Effective length of the wrench as described below.
|
| Dial Wrenches = |
The measured distance from the center of the square drive to the center ring or notch on the handle.
|
| Micrometer Wrenches = |
The measured length from the center of the square drive to the center of the handle, with the wrench set at the desired torque reading.
|
| Desired Torque (TA) = |
The torque value designated for the fastener with or without an adapter.
|
| Added Length of Adapter (A) = |
The measured length from the center of the adapter drive to the center of the wrench square drive.
|
| New Setting (TW) = |
The torque setting on the wrench allowing for the added length of the adapter. This reading will be lower than the desired torque.
|
| Example: |
250 ft. lb. Dial Wrench using a 2” long crowfoot adapter
L = Effective Length: 18.75”
Desired Torque = 250 ft. lb.
Length of Adapter = 2” |
| Result: |
|
18.75" x 250 ft. lb.
18.75" + 2"
|
= Pull Wrench to 226 ft. lb. |
|
| 
