Torque Unit Converter – Convert Nm to lb-ft, lb-in and kg-m
Torque Unit Converter
Free torque unit converter – type a value into any unit field to instantly convert across all torque measurements in real-time.
Use this free torque unit converter to convert Nm to lb-ft, lb-in and kg-m instantly – type in any field.
Quick answer
To convert Nm to lb-ft, multiply by 0.73756. To convert lb-ft to Nm, multiply by 1.35582. Example: 250 Nm × 0.73756 ≈ 184.39 lb-ft. This torque unit converter converts newton-metres, pound-feet, pound-inches and kilogram-metres at the same time – just type in any field.
Table of Contents
Torque specs come in different units depending on where a car, bike or tool was made. European and Asian service manuals usually use newton-metres (Nm), American manuals use pound-feet (lb-ft) or pound-inches (lb-in), and older specs sometimes use kilogram-metres (kg-m). Getting the conversion wrong can mean a stripped thread or a loose wheel.
Our free torque unit converter removes the guesswork. Type a number into any of the four fields and the other three update in real time. A built-in reference matrix shows the base conversion factors, and everything runs privately in your browser.
Torque Conversion Formulas
| Convert | Multiply by | Example |
|---|---|---|
| Nm → lb-ft | 0.737562 | 100 Nm = 73.76 lb-ft |
| lb-ft → Nm | 1.355818 | 100 lb-ft = 135.58 Nm |
| Nm → lb-in | 8.850746 | 10 Nm = 88.51 lb-in |
| lb-in → Nm | 0.112985 | 100 lb-in = 11.30 Nm |
| lb-ft → lb-in | 12 | 25 lb-ft = 300 lb-in |
| kg-m → Nm | 9.80665 | 10 kg-m = 98.07 Nm |
| Nm → kg-m | 0.101972 | 100 Nm = 10.20 kg-m |
These factors come from the definitions of the units: one pound-force is 4.448222 newtons and one foot is 0.3048 metres, so 1 lb-ft = 4.448222 × 0.3048 ≈ 1.355818 Nm. One kilogram-force is exactly 9.80665 N, so 1 kg-m = 9.80665 Nm.
Nm to lb-ft worked example
An engine is rated at 400 Nm of torque. 400 × 0.737562 ≈ 295 lb-ft.
lb-ft to Nm worked example
A wheel nut spec says 100 lb-ft. 100 × 1.355818 ≈ 135.6 Nm – set your torque wrench to 135 or 136 Nm depending on its scale.
How to Use the Torque Unit Converter
Converting torque units takes only a few seconds.
Step 1: Type a Value in Any Unit Field
Click the field for the unit you already have – Newton-meters, Pound-feet, Pound-inches or Kilogram-meters – and type your number. For example, enter 250 in Newton-meters.
Step 2: Read All Converted Values Instantly
The other three fields update in real time. 250 Nm shows as 184.39 lb-ft, 2,212.69 lb-in and 25.49 kg-m. It works in any direction: type 100 in Pound-feet and you get 135.58 Nm.
Step 3: Check the Reference Matrix or Clear
Use the Base Conversion Reference Matrix below the fields for quick 1-unit factors, and click Clear Fields to start a new conversion.
Common Torque Values: Nm to lb-ft Chart
| Nm | lb-ft | lb-in |
|---|---|---|
| 5 Nm | 3.69 lb-ft | 44.25 lb-in |
| 10 Nm | 7.38 lb-ft | 88.51 lb-in |
| 25 Nm | 18.44 lb-ft | 221.27 lb-in |
| 50 Nm | 36.88 lb-ft | 442.54 lb-in |
| 100 Nm | 73.76 lb-ft | 885.07 lb-in |
| 150 Nm | 110.63 lb-ft | 1,327.61 lb-in |
| 200 Nm | 147.51 lb-ft | 1,770.15 lb-in |
| 300 Nm | 221.27 lb-ft | 2,655.22 lb-in |
| 500 Nm | 368.78 lb-ft | 4,425.37 lb-in |
Where You Need a Torque Unit Converter
- Car maintenance: wheel nuts, spark plugs, drain plugs and cylinder-head bolts all have torque specs. Always follow the value in your vehicle manual.
- Bicycles: carbon handlebars and seat posts are often rated at only 4–6 Nm (about 35–53 lb-in), so pound-inches matter.
- Comparing engines: spec sheets list torque in Nm or lb-ft depending on the market.
- Power tools: impact drivers and wrenches quote maximum torque in Nm or in-lbs.
- Engineering and education: converting between SI and imperial units in coursework.
Tips for Accurate Torque Settings
- Round to the scale of your torque wrench, never above the maximum spec.
- lb-ft and ft-lb are used interchangeably for torque; in-lb and lb-in also mean the same.
- Use pound-inches for small fasteners – a click wrench in lb-ft is often inaccurate below about 20% of its range.
- Torque (Nm) and energy (joules) share base units, but they are different quantities – do not mix them up.
Working with other physics units? Try our Wavelength to Frequency Calculator or convert pressure with the Bar to PSI Converter.
Frequently Asked Questions
How do I convert Nm to lb-ft?
Multiply newton-metres by 0.737562. For example, 100 Nm × 0.737562 = 73.76 lb-ft.
How do I convert lb-ft to Nm?
Multiply pound-feet by 1.355818. For example, 80 lb-ft × 1.355818 = 108.47 Nm.
Is ft-lb the same as lb-ft?
For torque, yes. Both describe one pound-force acting at one foot. lb-ft is the preferred engineering form.
How many lb-in are in 1 lb-ft?
There are 12 pound-inches in one pound-foot because there are 12 inches in a foot.
What is kg-m torque in Nm?
1 kilogram-metre (kgf·m) equals 9.80665 Nm. Multiply kg-m by 9.80665 to get Nm.
Is this torque unit converter free?
Yes. It is free, needs no sign-up and converts all four units instantly in your browser.