Newton-Meters to Foot-Pounds Converter

How to convert newton-meters to foot-pounds

foot-pounds = newton-meters ÷ 1.3558179483314004

The newton-meter is the SI unit of torque. 1 foot-pound (pound-force foot) is 0.3048 m × 0.45359237 kg × 9.80665 m/s², about 1.3558 newton-meters.

Dividing by 1.3558179483314004 is exact. Written as a multiplication the factor is a repeating decimal, 1 N·m = 0.7375621492773… ft·lb, so a rounded multiplier such as 0.7376 is slightly off. This converter keeps the exact fraction (2500000000000000/3389544870828501) and rounds only the result it shows.

Worked example: 120 N·m

1. Start with the value in newton-meters: 120 N·m.
2. Divide by 1.3558179483314004, because 1 foot-pound = 1.3558179483314004 newton-meters: 120 ÷ 1.3558179483314004 = 88.50745791….
3. Round to the precision you need: 88.51 ft·lb to two decimals.

Newton-Meters and foot-pounds side by side

Newton-Meters to foot-pounds chart

Print chart

Newton-meters from 5 to 500 converted to foot-pounds with the exact factor, shown to five significant digits.

Newton-Meters to foot-pounds, part 1 of 4

N·m	ft·lb
5	3.6878
10	7.3756
15	11.063
20	14.751
25	18.439
30	22.127
35	25.815
40	29.502
45	33.19
50	36.878
55	40.566
60	44.254
65	47.942
70	51.629
75	55.317
80	59.005
85	62.693
90	66.381
95	70.068
100	73.756
105	77.444
110	81.132
115	84.82
120	88.507
125	92.195

Newton-Meters to foot-pounds, part 2 of 4

N·m	ft·lb
130	95.883
135	99.571
140	103.26
145	106.95
150	110.63
155	114.32
160	118.01
165	121.7
170	125.39
175	129.07
180	132.76
185	136.45
190	140.14
195	143.82
200	147.51
205	151.2
210	154.89
215	158.58
220	162.26
225	165.95
230	169.64
235	173.33
240	177.01
245	180.7
250	184.39

Newton-Meters to foot-pounds, part 3 of 4

N·m	ft·lb
255	188.08
260	191.77
265	195.45
270	199.14
275	202.83
280	206.52
285	210.21
290	213.89
295	217.58
300	221.27
305	224.96
310	228.64
315	232.33
320	236.02
325	239.71
330	243.4
335	247.08
340	250.77
345	254.46
350	258.15
355	261.83
360	265.52
365	269.21
370	272.9
375	276.59

Newton-Meters to foot-pounds, part 4 of 4

N·m	ft·lb
380	280.27
385	283.96
390	287.65
395	291.34
400	295.02
405	298.71
410	302.4
415	306.09
420	309.78
425	313.46
430	317.15
435	320.84
440	324.53
445	328.22
450	331.9
455	335.59
460	339.28
465	342.97
470	346.65
475	350.34
480	354.03
485	357.72
490	361.41
495	365.09
500	368.78

foot-pounds = newton-meters ÷ 1.3558179483314004. Factors: NIST SP 811, BIPM SI Brochure. unitcheck.net/energy/newton-meters-to-foot-pounds/

Check which unit your wrench shows

A torque wrench set to “100” applies very different torque depending on its scale: 100 N·m is 73.76 ft·lb, and 100 ft·lb is 135.58 N·m. Confirm the unit on the tool and on the specification before tightening.

Where the factor comes from

A foot-pound of torque is one pound-force acting at one foot. With 1 ft = 0.3048 m, 1 lb = 0.45359237 kg and standard gravity 9.80665 m/s² (all exact by definition), 1 ft·lb = 0.3048 × 0.45359237 × 9.80665 = 1.3558179483314004 N·m. Small fasteners are often specified in inch-pounds: 1 ft·lb = 12 in·lb.