Nm to ft-lbs Converter (Newton-Meters to Foot-Pounds)
Convert torque in newton-meters to foot-pounds for torque wrenches, wheel nuts and engine specs. 1 N·m = 0.73756 lbf·ft, so 100 N·m is 73.76 ft-lbs and 200 N·m is 147.51 ft-lbs.
Referências do dia a dia
Tabela de conversão entre unidades
| Grupo | Unidade | Símbolo | Valor equivalente |
|---|---|---|---|
| SI e métrico | Newton-milímetro | N·mm | 200.000 |
| SI e métrico | Newton-centímetro | N·cm | 20.000 |
| SI e métrico | Newton-metro | N·m | 200 |
| SI e métrico | Quilonewton-metro | kN·m | 0,2 |
| Imperial e americano | Libra-pé | lbf·ft | 147,5124 |
| Imperial e americano | Libra-polegada | lbf·in | 1.770,1492 |
| Imperial e americano | Onça-polegada | ozf·in | 28.322,3865 |
| Quilograma-força | Quilograma-força metro | kgf·m | 20,3943 |
| Quilograma-força | Quilograma-força centímetro | kgf·cm | 2.039,4324 |
Explicação matemática passo a passo
- 1 lbf·ft equivale a 1,35581794833 N·m, então divida por esse fator: 200 ÷ 1,35581794833 = 147,51243 lbf·ft.
- Fator direto: 1 N·m = 0,73756215 lbf·ft.
Fatores de conversão essenciais
Newton-metro: Unidade de torque do SI — chaves e motores
N·m to lbf·ft formula
Resposta direta: 1 N·m = 0,73756215 lbf·ft, so multiply by 0,73756215: lbf·ft = N·m × 0,73756215. Going back: N·m = lbf·ft × 1,3558179.
How to convert newtons-metro to libras-pé
Torque is force × distance. One foot-pound (lbf·ft) is one pound-force acting at one foot: 4.4482216 N × 0.3048 m = 1.3558179 N·m. Dividing newton-meters by 1.3558, or multiplying by 0.73756, gives foot-pounds. "ft-lbs", "lb-ft" and "lbf·ft" all mean the same unit.
1. N·m → lbf·ft
Multiply the number of newtons-metro by the conversion factor:
Example: 200 N·m × 0,73756215 = 147,51 lbf·ft.
2. lbf·ft → N·m
To go back, divide by the same factor, or multiply by its reciprocal, 1,3558179:
Example: 147,51 lbf·ft ÷ 0,73756215 = 200 N·m.
Mental math: take off a quarter
Subtract a quarter of the N·m value. The estimate is about 1.7% high, fine for setting a click wrench:
120 N·m: 120 − 30 = 90 ft-lbs (exact: 88.51 ft-lbs).
1 N·m in other torque units
| Unit | 1 N·m equals | Typical use |
|---|---|---|
| Newton-milímetro | 1.000 N·mm | Pequenos fixadores e eletrônica |
| Newton-centímetro | 100 N·cm | Parafusadeiras e motores pequenos |
| Quilonewton-metro | 0,001 kN·m | Estruturas e máquinas pesadas |
| Libra-pé | 0,73756215 lbf·ft | Torque de motores e porcas de roda nos EUA (ft-lb) |
| Libra-polegada | 8,8507458 lbf·in | Parafusos pequenos e componentes de bicicleta (in-lb) |
| Onça-polegada | 141,61193 ozf·in | Servos e motores de passo |
| Quilograma-força metro | 0,10197162 kgf·m | Especificações asiáticas e europeias antigas |
| Quilograma-força centímetro | 10,197162 kgf·cm | Servos de aeromodelismo e motores pequenos |
N·m to lbf·ft chart
| N·m | lbf·ft |
|---|---|
| 5 | 3,69 |
| 10 | 7,38 |
| 12 | 8,85 |
| 15 | 11,06 |
| 20 | 14,75 |
| 25 | 18,44 |
| 27 | 19,91 |
| 30 | 22,13 |
| 35 | 25,81 |
| 40 | 29,5 |
| 45 | 33,19 |
| 50 | 36,88 |
| 55 | 40,57 |
| 60 | 44,25 |
| 70 | 51,63 |
| 80 | 59 |
| 90 | 66,38 |
| 100 | 73,76 |
| 110 | 81,13 |
| 120 | 88,51 |
| 130 | 95,88 |
| 140 | 103,26 |
| 150 | 110,63 |
| 180 | 132,76 |
| 200 | 147,51 |
| 250 | 184,39 |
| 300 | 221,27 |
| 350 | 258,15 |
| 400 | 295,02 |
| 450 | 331,9 |
| 500 | 368,78 |
| 600 | 442,54 |
| 800 | 590,05 |
| 1.000 | 737,56 |
lbf·ft to N·m chart
| lbf·ft | N·m |
|---|---|
| 5 | 6,78 |
| 10 | 13,56 |
| 15 | 20,34 |
| 18 | 24,4 |
| 20 | 27,12 |
| 25 | 33,9 |
| 30 | 40,67 |
| 35 | 47,45 |
| 40 | 54,23 |
| 45 | 61,01 |
| 50 | 67,79 |
| 55 | 74,57 |
| 60 | 81,35 |
| 65 | 88,13 |
| 70 | 94,91 |
| 75 | 101,69 |
| 80 | 108,47 |
| 85 | 115,24 |
| 90 | 122,02 |
| 100 | 135,58 |
| 110 | 149,14 |
| 120 | 162,7 |
| 140 | 189,81 |
| 150 | 203,37 |
| 200 | 271,16 |
| 250 | 338,95 |
| 300 | 406,75 |
| 400 | 542,33 |
| 500 | 677,91 |
Perguntas frequentes
What is 100 N·m in lbf·ft?
100 N·m is 73,76 lbf·ft (100 × 0,73756215).
What is 400 N·m in lbf·ft?
400 N·m is 295,02 lbf·ft (400 × 0,73756215).
Is lb-ft the same as ft-lbs?
Yes, for torque. Engineers write lbf·ft or lb-ft for torque and keep ft-lbf for work and energy, but torque wrenches and service manuals use ft-lbs for the same quantity: 1.3558 N·m.
What is a typical wheel nut torque in Nm and ft-lbs?
Most passenger cars specify 110–140 N·m (81–103 ft-lbs) for wheel nuts; light trucks often 150–200 N·m (111–148 ft-lbs). Always use the figure in your vehicle's handbook.