Convert torque units instantly across Newton-metres, pound-feet, pound-inches, kilogram-force units, and ounce-inches. You can also calculate torque from force and distance, estimate motor torque from power and RPM, and plan bolt tightening values for workshop, engineering, HVAC, and automotive tasks.
| Unit / Output | Value | Meaning |
|---|---|---|
| Run a calculation to fill the summary table. | ||
Start by choosing the mode that matches your task. Use Unit Conversion if you already know the torque and simply need another unit. Pick Force × Distance when you know the push or pull force and the effective lever arm. Choose Motor Torque to estimate shaft torque from power and RPM, or use Bolt Planner when you want to understand how much hand force is required with a given wrench length.
After entering values, the tool immediately returns the primary result, a Newton-metre reference, and an alternate comparison result. The summary table gives more context so you can cross-check units like Nm, lb-ft, and lb-in before applying the number in a real-world setup.
The most important torque formula is torque = force × perpendicular distance. This is why a longer wrench produces more torque with the same applied force. For rotating equipment, torque can also be estimated from power and rotational speed, which is useful for motors, gear drives, and machine design.
If a car wheel nut requires 110 Nm, the converter shows that this is about 81.1 lb-ft. If your wrench handle is 0.30 m long, you would need about 367 N of perpendicular force to reach the same torque at the handle.
A torque converter calculator is useful any time you move between service manuals, tool settings, or design notes that use different units. Automotive repair guides often list tightening specs in Newton metres, while some torque wrenches in older markets still use pound-feet or pound-inches. Electronics, bicycle assembly, and small appliance repair may use even smaller units because delicate fasteners can be damaged by overtightening. A reliable torque converter saves time because it removes mental math and reduces the chance of a mistake on critical parts.
Torque measures a twisting effect rather than straight-line force. That is why the same push can create very different results depending on handle length. When people search for a torque converter, they often need more than a raw number. They want to know whether a value belongs to a small, medium, or high torque task, whether it sounds reasonable for the job, and how it compares across the tools they actually own. That is why this page includes SI reference output, comparison units, and mode-based interpretation instead of behaving like a simple one-line converter.
For automotive work, torque values matter on wheel nuts, spark plugs, drain plugs, suspension hardware, brake components, and engine fasteners. A wheel nut value written as 110 Nm becomes much easier to use when you can instantly see the equivalent in lb-ft. The same applies to spark plugs, where specifications are often lower and may be easier to understand in lb-in. Small deviations can matter because under-tightening can lead to loosening or leaks, while over-tightening can strip threads or crack housings.
In workshop and fabrication environments, a torque calculator helps when using hand tools, beam torque wrenches, click wrenches, and improvised lever arms. Suppose you know the torque target but only want to estimate the required force at the end of a bar. The force-and-distance mode lets you model that scenario directly. This is especially helpful in learning environments where students need to understand the relationship between torque, leverage, and rotational mechanics instead of memorising disconnected unit factors.
Mechanical design and industrial maintenance often connect torque with power and rotational speed. Motor nameplates usually show power and RPM, not direct shaft torque. That makes a motor torque estimator useful when you are comparing gearbox options, belt drive ratios, or the expected load on a rotating component. Because real systems have losses, the FastCalc torque converter also includes an efficiency input. This gives a more realistic planning number than a frictionless textbook estimate.
Another practical reason people look for a torque converter is bolt planning. If a torque wrench is unavailable, users sometimes want to estimate the force needed at a known wrench length. While a dedicated calibrated tool remains the safest choice, a torque planner can still help explain the mechanics behind tightening and give perspective on how handle length changes required effort. A shorter wrench means more hand force. A longer wrench means less force to reach the same torque. Understanding that relationship improves confidence and technique.
Unit awareness also matters. Newton metre is the standard SI torque unit. Pound-foot is common in automotive and field service work, while pound-inch is often used for smaller hardware. Kilogram-force units still appear in some regional manuals and tool markings. The ability to move cleanly between these systems is valuable because real jobs rarely arrive in one perfectly standard format. FastCalc supports common workshop units and uses Newton metre as the internal base reference so all conversions stay consistent.
This page is also structured for search intent. People often search phrases like Nm to lb-ft converter, lb-ft to Nm calculator, torque formula calculator, motor torque calculator, or bolt torque converter. Instead of forcing separate tools for each narrow variation, this page brings those use cases together while keeping the interface easy on mobile. That is especially important because technicians, mechanics, students, and DIY users frequently open tools directly on phones in garages, workshops, or labs.
From an educational point of view, a strong torque converter should do more than translate a number. It should help users understand why torque behaves the way it does. The force-and-distance mode shows the mechanical principle clearly. The motor mode links torque with power transmission. The bolt planner turns abstract values into a feel-based real-world estimate. These features make the tool more useful for revision, hands-on learning, and quick verification before action.
Use this torque converter whenever you need a fast, accurate, and practical answer. It works well for automotive torque specs, bicycle assembly, machine maintenance, mechanical assignments, engineering checks, and workshop comparisons. Because the tool is mobile-first, self-contained, and instant, it fits the kind of real environments where people actually need torque information most.
No. One Newton metre equals about 0.73756 pound-feet, so 1 lb-ft is larger than 1 Nm.
Smaller fasteners need finer resolution, so pound-inches are often easier to use for light-duty torque settings.
No. This calculator helps with conversion and planning, but a calibrated torque wrench is still the correct tool for critical tightening work.
It assumes a steady relationship between power and rotational speed and lets you reduce the ideal torque by efficiency to model shaft output more realistically.