20 Nm to ft-lbs

Open 20 Nm in the converter →

Where you might see 20 Nm

Spark plugs with a 14 mm taper seat (no washer) are typically 10 to 20 Nm. It is close to the typical dry torque for M6 grade 12.9 (18 Nm). See the metric bolt torque chart. Always use the figure in your vehicle or part maker's manual.

How to work it out

Multiply Nm by 0.737562: 20 x 0.737562 = 14.75 ft-lbs. To go back, multiply ft-lbs by 1.35582. On a torque wrench, set 15 ft-lbs (or 177 in-lb on a small wrench).

Nearby values

Nm	ft-lbs	in-lb
15	11.06	132.8
16	11.80	141.6
17	12.54	150.5
18	13.28	159.3
19	14.01	168.2
20	14.75	177.0
21	15.49	185.9
22	16.23	194.7
23	16.96	203.6
24	17.70	212.4
25	18.44	221.3

Full list: Nm to ft-lbs chart (1 to 300 Nm). Going the other way: ft-lbs to Nm chart.

Other popular conversions

• 10 Nm
• 25 Nm
• 30 Nm
• 40 Nm
• 50 Nm
• 60 Nm
• 100 Nm
• 120 Nm
• 140 Nm
• 160 Nm
• 200 Nm

Built and maintained by Daryn Potgieter. Conversion factor from NIST SP 811. Last reviewed 28 September 2026. Spotted an error? Tell us.