Torque Converter Online: Convert Nm to lb-ft, kgf·m and oz·in Free
CodexFuse Team · 2026-11-07T01:14:55.548Z · 9 min read min read
Convert torque units free online — Nm to lb-ft, kgf·m to Nm and more. A real workshop example, exact conversion factors, and honest limits.
A torque converter is a free online tool that converts a torque value from one unit to another — newton-meters to pound-feet, kilogram-force meters to ounce-inches, and back — instantly and without installing anything. You type a number, pick the unit you have and the unit you need, and the tool gives you the converted value. It exists because torque is still published in different units depending on the country, the industry, and the age of the manual you are reading.
If you have ever stared at a service manual that says 120 lb-ft while your torque wrench only shows Nm, you know the problem. Guessing the conversion, or rounding it in your head, is how bolts get over-torqued and threads get stripped. This article shows you how to convert torque correctly, walks through a real workshop example with exact numbers, and explains where a converter helps — and where it cannot.
What Is a Torque Converter Tool?
A torque converter tool is a unit converter built specifically for torque: it takes a value in one torque unit and returns the equivalent value in another, using fixed conversion factors. It handles the ten units engineers and mechanics actually meet — newton-meter (Nm), pound-foot (lb-ft), pound-inch (lb-in), kilogram-force meter (kgf·m), ounce-inch (oz·in), and their smaller variants — so a spec written in one system becomes usable in another. It converts numbers only; it does not measure torque or check whether a bolt was tightened correctly.
Why Torque Comes in So Many Units
Torque is force applied at a distance, so every unit is a force unit multiplied by a length unit — and different industries picked different combinations. American automotive manuals still use pound-feet because the US customary system dominates US car culture. European and Asian manufacturers publish newton-meters because the metric system is standard there. Older machinery documentation, especially from Japan, uses kilogram-force meters. Small electronics and precision assembly use ounce-inches or pound-inches because the numbers stay readable.
The practical result is that one workshop can meet three unit systems in a single week: a Japanese bike manual in kgf·m, a US truck manual in lb-ft, and a German torque wrench marked in Nm. A converter removes the arithmetic from that chain, which matters because torque errors are not cosmetic — 20% too much torque on a cylinder head bolt can warp the head, and 20% too little can let a wheel nut work loose.
Always convert the spec before you set the wrench, never after you have already tightened the bolt. A torque value is a target, not a report — once the bolt is tight, the number on the wrench tells you nothing about the load already in the fastener.
A Real Workshop Example: 120 lb-ft to Nm
Bilal runs a small auto workshop in Lahore. A customer brings in a 2018 pickup with a US service manual, and the manual lists the wheel lug-nut torque as 120 lb-ft. Bilal's click-type torque wrench is marked in newton-meters. He needs the exact Nm setting before he touches a single nut.
He opens the free torque converter, types 120, selects pound-feet as the input unit and newton-meters as the output unit. The tool returns 162.7 Nm. The conversion factor is fixed: 1 lb-ft equals 1.35582 Nm, so 120 × 1.35582 = 162.698, rounded to 162.7 Nm. Bilal sets his wrench to 163 Nm — the nearest setting his wrench offers — and tightens the nuts in a star pattern.
The same job needs a second conversion. The truck's engine torque is listed in a brochure as 250 Nm, and Bilal wants to quote it in lb-ft for the customer, who thinks in imperial units. 250 ÷ 1.35582 = 184.4 lb-ft. A third figure comes from an old Japanese torque chart for the same axle: 16.6 kgf·m. Checking it: 1 kgf·m equals 9.80665 Nm, so 16.6 × 9.80665 = 162.8 Nm — the same 120 lb-ft spec, confirmed from a third source. Three documents, three units, one consistent answer.
| Spec as published | Converted value | What Bilal does with it |
|---|---|---|
| 120 lb-ft (US manual) | 162.7 Nm | Sets the torque wrench to 163 Nm |
| 250 Nm (brochure) | 184.4 lb-ft | Quotes engine torque to the customer |
| 16.6 kgf·m (Japanese chart) | 162.8 Nm | Cross-checks the lug-nut spec |
When two documents disagree by more than a rounding error — say one says 120 lb-ft and another says 150 Nm for the same bolt — trust neither until you check the official manual. Unit conversion only fixes units; it cannot fix a wrong spec.
How Do You Use the Free Torque Converter?
You use the free torque converter in three steps: enter the value you have, choose the unit it is in, and read the converted result. The tool covers ten torque units and updates the result instantly in your browser, so there is no waiting and no file to download. Conversion is free and unlimited, and you sign in with a free CodexFuse account to use it.
- Enter the value. Type the torque number exactly as it appears in your manual or spec sheet — for example, 120.
- Choose the units. Select the unit you are converting from (lb-ft) and the unit you want (Nm). The tool supports Nm, lb-ft, lb-in, kgf·m, oz·in, and five more units.
- Read the result. The converted value appears immediately. Round it to the nearest setting your wrench or instrument actually offers, and write the rounded figure on the job card so the next person uses the same number.
The same three steps work for any unit pair the tool supports, whether you are converting a bicycle torque spec in Nm to lb-in for a small torque screwdriver, or a heavy-machinery spec in kgf·m to Nm for a hydraulic torque wrench.
Common Torque Conversions at a Glance
These are the conversions mechanics and engineers look up most often. They are exact to the decimals shown; your wrench's own accuracy — typically ±4% for a click-type wrench — matters more than the fifth decimal place.
| From | To | Multiply by | Example |
|---|---|---|---|
| 1 lb-ft | Nm | 1.35582 | 100 lb-ft = 135.6 Nm |
| 1 Nm | lb-ft | 0.73756 | 200 Nm = 147.5 lb-ft |
| 1 kgf·m | Nm | 9.80665 | 10 kgf·m = 98.1 Nm |
| 1 Nm | oz·in | 141.612 | 5 Nm = 708.1 oz·in |
| 1 lb-in | Nm | 0.112985 | 50 lb-in = 5.65 Nm |
If you convert torque values often, bookmark the tool alongside your other unit converters — a weight converter for load specs and a timezone converter for coordinating with overseas suppliers cover the other two numbers that cause daily mix-ups in a workshop.
Your workshop's real problem is not one conversion — it is the admin around the job: invoices, customer records, supplier email, and backups scattered across subscriptions. CodexFuse brings hosting, business email, security, and backups together on one fully managed platform, on pay-as-you-go credits.
Get Started with CodexFuseWhat This Tool Does Not Do
A torque converter is honest about its limits, and knowing them keeps you safe. It converts numbers — it does not measure torque, calibrate your wrench, or tell you whether a bolt is tight enough.
- No calibration check. A converter cannot tell you your torque wrench has drifted. Click-type wrenches should be calibrated at least once a year, or after a drop.
- No clamp-load correction. The same torque produces different clamping force on a dry thread, an oiled thread, and a rusted thread. The spec assumes the thread condition the manual states — usually clean and lightly oiled — so follow that, not just the number.
- No spec validation. If the manual you are reading has a misprint, the converter will faithfully convert the wrong number. Cross-check critical specs against a second source, as Bilal did with the Japanese chart.
- Browser-based only. The tool runs in your browser and needs an internet connection and a free CodexFuse account sign-in; it is not an offline app for the shop floor.
For workshops, the same discipline applies to the business side: a single wrong number in an invoice or a lost customer record costs more than a wrong torque figure. That is why CodexFuse runs the whole platform — hosting, email, security, backups — as one managed service on credits, so nothing depends on remembering which subscription holds which piece of your business. If you also juggle weight specs from overseas suppliers, the tola-to-kg converter handles the other unit system your supply chain still uses.
If you work with mixed unit systems every day, keep these converters handy: Time Converter — convert time units free and Tons to Kg — free online tons to kilograms converter.
Frequently Asked Questions
How many lb-ft is 100 Nm?
100 Nm equals 73.76 lb-ft. Multiply newton-meters by 0.73756 to get pound-feet, so 100 × 0.73756 = 73.756, rounded to 73.8 lb-ft for most workshop purposes.
How do I convert lb-ft to Nm?
Multiply the pound-feet value by 1.35582. For example, 120 lb-ft × 1.35582 = 162.7 Nm. Or use the free torque converter: enter the value, choose lb-ft and Nm, and read the result instantly.
What is the difference between lb-ft and lb-in?
Both are imperial torque units, but pound-feet are twelve times larger than pound-inches: 1 lb-ft equals 12 lb-in. Lb-ft is used for wheels, engines, and heavy fasteners; lb-in is used for small screws, electronics, and precision assembly where the numbers would otherwise be tiny.
Is the torque converter really free?
Yes. The converter is free and unlimited on CodexFuse — you sign in with a free account and convert as many values as you need, with no per-conversion charge and no subscription.
Can I convert kgf·m to Nm?
Yes. Multiply kgf·m by 9.80665 to get Nm — so 10 kgf·m equals 98.07 Nm. The converter handles this pair directly, along with oz·in, lb-in, and the other six supported units.
Why does my torque wrench show Nm but my manual says lb-ft?
Your wrench is marked in metric units and your manual was written for the US customary system. It is the most common mismatch in workshops: convert the manual's figure to Nm before setting the wrench, and write the converted value on the job card so the whole team uses one number.
Convert It Right, Then Run the Business Right
Torque conversion is a small task with outsized consequences — a single wrong number can strip a thread or leave a wheel nut loose. Use the free converter, convert before you set the wrench, and cross-check any spec that looks wrong. Then apply the same discipline to the rest of your workshop: move your website, business email, security, and backups to CodexFuse, where one fully managed platform on pay-as-you-go credits replaces the pile of subscriptions you are babysitting today. Sign up free, set up your hosting and email in minutes, and stop paying — in time or money — for tools that should simply work.
