ft-lbs to Nm Converter (Foot-Pounds to Newton-Meters)
Convert torque in foot-pounds to newton-meters for metric torque wrenches and service manuals. 1 lbf·ft = 1.35582 N·m, so 80 ft-lbs is 108.47 N·m and 100 ft-lbs is 135.58 N·m.
Referências do dia a dia
Tabela de conversão entre unidades
| Grupo | Unidade | Símbolo | Valor equivalente |
|---|---|---|---|
| SI e métrico | Newton-milímetro | N·mm | 108.465,4359 |
| SI e métrico | Newton-centímetro | N·cm | 10.846,5436 |
| SI e métrico | Newton-metro | N·m | 108,4654 |
| SI e métrico | Quilonewton-metro | kN·m | 0,1085 |
| Imperial e americano | Libra-pé | lbf·ft | 80 |
| Imperial e americano | Libra-polegada | lbf·in | 960 |
| Imperial e americano | Onça-polegada | ozf·in | 15.360 |
| Quilograma-força | Quilograma-força metro | kgf·m | 11,0604 |
| Quilograma-força | Quilograma-força centímetro | kgf·cm | 1.106,0396 |
Explicação matemática passo a passo
- 1 lbf·ft equivale a 1,35581794833 N·m, então multiplique: 80 × 1,35581794833 = 108,465436 N·m.
- Fator direto: 1 lbf·ft = 1,35581795 N·m.
Fatores de conversão essenciais
Libra-pé: Torque de motores e porcas de roda nos EUA (ft-lb)
lbf·ft to N·m formula
Resposta direta: 1 lbf·ft = 1,3558179 N·m, so multiply by 1,3558179: N·m = lbf·ft × 1,3558179. Going back: lbf·ft = N·m × 0,73756215.
How to convert libras-pé to newtons-metro
A foot-pound of torque is one pound-force (4.4482216 N) acting at one foot (0.3048 m), which is 1.3558179 N·m. Multiply foot-pounds by 1.35582 to get newton-meters. US specs are usually in ft-lbs (or in-lbs for small fasteners); European and Asian manuals use N·m.
1. lbf·ft → N·m
Multiply the number of libras-pé by the conversion factor:
Example: 80 lbf·ft × 1,3558179 = 108,47 N·m.
2. N·m → lbf·ft
To go back, divide by the same factor, or multiply by its reciprocal, 0,73756215:
Example: 108,47 N·m ÷ 1,3558179 = 80 lbf·ft.
Mental math: add a third
Add a third of the ft-lbs value. The estimate is under 2% low:
90 ft-lbs: 90 + 30 = 120 N·m (exact: 122.02 N·m).
1 lbf·ft in other torque units
| Unit | 1 lbf·ft equals | Typical use |
|---|---|---|
| Newton-milímetro | 1.355,8179 N·mm | Pequenos fixadores e eletrônica |
| Newton-centímetro | 135,58179 N·cm | Parafusadeiras e motores pequenos |
| Newton-metro | 1,3558179 N·m | Unidade de torque do SI — chaves e motores |
| Quilonewton-metro | 0,0013558179 kN·m | Estruturas e máquinas pesadas |
| Libra-polegada | 12 lbf·in | Parafusos pequenos e componentes de bicicleta (in-lb) |
| Onça-polegada | 192 ozf·in | Servos e motores de passo |
| Quilograma-força metro | 0,13825495 kgf·m | Especificações asiáticas e europeias antigas |
| Quilograma-força centímetro | 13,825495 kgf·cm | Servos de aeromodelismo e motores pequenos |
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 |
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 |
Perguntas frequentes
What is 100 lbf·ft in N·m?
100 lbf·ft is 135,58 N·m (100 × 1,3558179).
What is 250 lbf·ft in N·m?
250 lbf·ft is 338,95 N·m (250 × 1,3558179).
How many Nm is 1 ft-lb?
One foot-pound is 1.35582 N·m (1.3558179 to eight figures).
How do I convert inch-pounds to Nm?
Divide inch-pounds by 12 to get foot-pounds, or multiply by 0.112985 to get N·m directly. 100 in-lbs = 11.30 N·m. The torque converter above includes lbf·in.