# Torque Conversion Calculator (Nm to lbf-ft and More)

> Source: https://netray.co/tools/torque-conversion-calculator-nm-lbf-ft-kgf-m
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: Free Tools

## Short answer

Convert any torque value between Newton-metres, pound-feet, pound-inches, kgf-m, kgf-cm, ounce-inches and Newton-centimetres.

## Category

engineering-plm

## Audience

- Assembly engineer
- Quality engineer
- Maintenance technician
- Technical writer

## Tool

**Kind:** calculator

**Inputs:**

#### Torque value

**Key:** value

**Type:** number

**Default:** 100

**Min:** 0

**Step:** 1

**Help:** The number as written on the drawing or work instruction.

#### Convert from

**Key:** from

**Type:** select

**Default:** 1

**Options:**

##### Newton-metre (N-m)

**Value:** 1

##### Pound-foot (lbf-ft)

**Value:** 1.3558179

##### Pound-inch (lbf-in)

**Value:** 0.1129848

##### Kilogram-force metre (kgf-m)

**Value:** 9.80665

##### Kilogram-force centimetre (kgf-cm)

**Value:** 0.0980665

##### Ounce-force inch (ozf-in)

**Value:** 0.00706155

##### Newton-centimetre (N-cm)

**Value:** 0.01

**Outputs:**

#### Newton-metre (N-m)

**Key:** nm

**Expr:** value * from

**Format:** decimal

**Primary:** true

#### Pound-foot (lbf-ft)

**Key:** lbf_ft

**Expr:** nm / 1.3558179

**Format:** decimal

**Primary:** true

#### Pound-inch (lbf-in)

**Key:** lbf_in

**Expr:** nm / 0.1129848

**Format:** decimal

#### Kilogram-force metre (kgf-m)

**Key:** kgf_m

**Expr:** nm / 9.80665

**Format:** decimal

#### Kilogram-force centimetre (kgf-cm)

**Key:** kgf_cm

**Expr:** nm / 0.0980665

**Format:** decimal

#### Ounce-force inch (ozf-in)

**Key:** ozf_in

**Expr:** nm / 0.00706155

**Format:** decimal

#### Newton-centimetre (N-cm)

**Key:** ncm

**Expr:** nm * 100

**Format:** decimal

**Chart:**

#### N-m and lbf-ft for the same torque

**Type:** line

**X:** value

**From:** 10

**To:** 500

**Steps:** 25

**Series:**

- nm
- lbf_ft

**Disclaimer:** Conversion only. Always follow the torque value, lubrication condition and tightening sequence in the approved drawing or manufacturer procedure.

## Content

**Intro:** Torque specifications arrive in N-m from European drawings, lbf-ft from US maintenance manuals, lbf-in on small fasteners and kgf-m or kgf-cm on older Japanese documents. This calculator converts between all of them with standard factors.

**Sections:**

#### How to use the calculator

**Body:** Enter the torque value, pick the unit it is written in, and read every other unit in the results. The two primary outputs are N-m and lbf-ft, which cover most shop floors. The chart shows the linear relationship between the two, which is useful for creating a quick lookup card at an assembly station. Update your work instruction with the converted value and note the original unit so auditors can trace the source.

**Bullets:**

- Check the unit label twice: lbf-in and lbf-ft differ by a factor of 12
- N-cm is common on small electronics screws
- kgf-m appears on older Japanese equipment manuals
- Round to the resolution of your torque tool

#### Conversion factors used

**Body:** One lbf-ft equals 1.3558179 N-m. One lbf-in equals 0.1129848 N-m. One kgf-m equals 9.80665 N-m, since a kilogram-force is defined with standard gravity. One ozf-in equals 0.00706155 N-m, and one N-cm equals 0.01 N-m. All other units are computed from N-m, so there is no accumulated rounding between steps.

#### Worked example

**Body:** A US maintenance card calls for 85 lbf-ft on a wheel stud. Enter 85 with lbf-ft selected to get 115.2 N-m, which you can round to 115 N-m for a click-type wrench. A small instrument screw at 10 lbf-in converts to 1.13 N-m, or 113 N-cm. Remember that a rounded value must still sit inside the tolerance band on your torque tool, normally plus or minus 4 percent for class II click wrenches under ISO 6789.

#### Common mistakes

**Body:** The most expensive mistake is a wrong foot-inch confusion, which gives a twelve-fold error. Others include applying a dry torque to a lubricated thread, converting a torque-angle spec as if it were a single torque, and rounding too aggressively on small fasteners. Where torque is a controlled characteristic, record both the original and the converted value in the control plan.

**Bullets:**

- Torque-plus-angle specs must not be converted as a single value
- Lubrication changes achieved clamp load for the same torque
- Verify wrench calibration range covers the converted value
- Document the source unit in the work instruction

**Cta:** If your ERP or MES holds torque specs in mixed units, Netray can help build a read-only check across routings and work instructions. Ask for a scoping call.

**Faq:**

#### How many N-m is 1 lbf-ft?

**Answer:** One pound-foot equals 1.3558179 Newton-metres. As a quick rule, multiply lbf-ft by 1.356 to get N-m, or multiply N-m by 0.7376 to get lbf-ft.

#### How do I convert in-lb to N-m?

**Answer:** Multiply inch-pounds by 0.1129848 to get Newton-metres. For example, 100 in-lb is 11.3 N-m. Divide by 12 first if you need pound-feet.

#### Is kgf-m the same as N-m?

**Answer:** No. One kgf-m equals 9.80665 N-m. Older Japanese and Korean documents often use kgf-m or kgf-cm, so converting without the factor produces a value nearly ten times too small.

#### Can I convert a torque-angle specification?

**Answer:** Only the torque portion converts. The angle is unitless in degrees and stays as written. Many angle-controlled joints also require new or lubricated fasteners, which a unit conversion does not address.

## Search terms

torque conversion calculator, nm to lbf ft, lb ft to nm, in lb to nm, kgf m to nm, torque wrench conversion, ozf in to nm, torque unit converter

---
Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json