Skip to content
This page is also available in your language. Switch

Sync settings

Choose what your account keeps in step on every device where you are signed in.

  • My tools

    Always synced: the tools on your board, their order and size.

  • The windows open on your start page, including what you typed in them.

  • Every note in the notepad – on the notepad page, on your board and in windows.

  • Every list of website shortcuts – on the shortcuts page, on your board and in windows.

  • Every grid in the cover grid maker – on its page, on your board and in windows.

  • Every list of bookmarked organisations in the OIN lookup – on its page, on your board and in windows.

  • Keeps your pipeline and saved recipes on all your devices. Your files are never synced – only the steps and settings.

Turning something off removes it from your account straight away. Your devices keep their own copy.

Notifications

Tools that can tell you about something new while a Synsi tab is open, even when you are in another tab or app. Choose them for this browser.

This browser cannot show notifications from websites.
Notifications are blocked for this site. Allow them in your browser’s site settings (the icon left of the address), then switch them on here.

  • Says “New message” while a Synsi tab is open – never who wrote it or what.

Your choice is stored in this browser only. Notifications never show personal content such as a message or a number. They work while a Synsi tab is open; closed tabs get none.

Browse all tools →

Torque Converter – Newton-metres, Pound-feet and Pound-inches

Convert engine torque and bolt tightening specifications between Nm, lb-ft and lb-in with this torque converter.

My tools →
Result –

Runs in your browser – your data never leaves your device Also available via our free API

Common conversions

From unit Value To unit Result
Pound-feet (lb-ft) 1 Newton-metres (N·m) 1.3558
Newton-metres (N·m) 1 Pound-feet (lb-ft) 0.7376
Pound-inches (lb-in) 1 Newton-metres (N·m) 0.113
Kilonewton-metres (kN·m) 1 Pound-feet (lb-ft) 737.5621

How to use the Torque Converter

  1. 1 Enter the torque value, for example from a workshop manual.
  2. 2 Choose the unit it is given in, such as Nm or lb-ft.
  3. 3 Choose the unit of your torque wrench and read the converted setting.

What torque measures

Torque is a turning force: a force applied at a distance from a pivot. It is calculated as force × lever arm, so units of torque combine a force and a length:

  • 1 newton-metre (Nm) – 1 N at a distance of 1 m. The SI unit.
  • 1 kilonewton-metre (kNm) = 1,000 Nm, used in structural engineering and large machinery.
  • 1 pound-foot (lb-ft) = 1.3558 Nm – 1 lbf at a distance of 1 ft.
  • 1 pound-inch (lb-in) = 0.11298 Nm – 1 lbf at 1 in; 12 lb-in make 1 lb-ft.

Engine torque

Car specifications list torque in Nm in most of the world and in lb-ft in the United States. A diesel engine with 400 Nm delivers 295 lb-ft, and a 300 lb-ft V8 delivers 407 Nm. Torque and power are related through engine speed: power in kW = torque in Nm × RPM ÷ 9,549.

Torque wrench settings

Workshop manuals give tightening torques for wheel nuts, spark plugs, cylinder heads and bicycle parts. Wheel nuts on a passenger car are typically tightened to about 100–140 Nm (74–103 lb-ft); always use the value for your vehicle. Small components such as bicycle stems or carbon seat posts are often specified in Nm or lb-in, sometimes as low as 4–6 Nm (35–53 lb-in), so convert carefully: confusing lb-ft with lb-in multiplies the force by 12 and can break the part.

lb-ft or ft-lb?

Pound-feet (lb-ft) and foot-pounds (ft-lb) are often used interchangeably for torque in everyday mechanics. Strictly, physicists use lb-ft for torque and ft-lb for energy or work, but the numerical conversion factor to newton-metres is the same: 1.3558.

Using a torque wrench correctly

Set the wrench in the unit printed on its scale, hold it by the handle rather than the extension and pull smoothly until it clicks. Tighten wheel nuts in a star pattern, and check them again after the first 50–100 km. Return a click-type wrench to its lowest setting after use to keep it accurate.

Sources

Conversion factors follow the SI definitions in the BIPM SI Brochure and the exact factors for US customary and imperial units in NIST Special Publication 811.

Frequently asked questions

How do I convert Nm to lb-ft?

Multiply newton-metres by 0.737562. For example, 100 Nm is 73.76 lb-ft.

How many Nm is 1 lb-ft?

One pound-foot is 1.35582 Nm.

How many lb-in are in a lb-ft?

There are 12 pound-inches in one pound-foot.

Are ft-lbs and lb-ft the same?

For torque wrench settings, yes – both convert to 1.3558 Nm.

Last updated: