Rex says
The fast lane for the math you almost remember from school. Type the numbers, get the answer, move on with your day.
Try a scenario
Click to load — tweak from there.Inputs
Result
Torque (N·m)
30.00
Torque (ft·lb)
22.13
Torque (in·lb)
265.5
Torque (kgf·m)
3.06
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter force (N).
- 2Enter lever arm (m).
- 3Enter angle (°).
- 4Read your torque (n·m) on the right — it updates as you type.
- 5Hit Share to keep the scenario or send it to someone.
About this calculator
Torque is force times distance times the sine of the angle between them. Useful for bolts, wrenches, and motor sizing.
Worked example
Using the values the calculator loads with:
Inputs
- Force: 100 N
- Lever arm: 0.3 m
- Angle: 90 °
Results
- Torque (N·m): 30
- Torque (ft·lb): 22.13
- Torque (in·lb): 265.5
- Torque (kgf·m): 3.06
What each field means
Inputs
- Force (N)
- The force used in the calculation, measured in N. Starts at 100 N so you have a working example on load.
- Lever arm (m)
- The lever arm used in the calculation, measured in m. Starts at 0.3 m so you have a working example on load.
- Angle (°)
- The angle used in the calculation, measured in °. Starts at 90 ° so you have a working example on load. Accepted range: 0–180 °.
Results
- Torque (N·m)
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Torque (ft·lb)
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Torque (in·lb)
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Torque (kgf·m)
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the torque calculator work?
Torque is force times distance times the sine of the angle between them. Useful for bolts, wrenches, and motor sizing. The underlying maths is: τ = F × r × sin θ
What do I need to enter?
3 values: force, lever arm, and angle. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the torque (n·m) result mean?
It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are rounded for display; the underlying calculation keeps full precision.
Who is this tool for?
It's built for students, developers, and anyone who needs the answer right now without setting up a spreadsheet.
Accuracy and limitations
- Results are rounded for display; the underlying calculation keeps full precision.
- Very large or very small inputs may hit floating-point limits in the browser.
- Inputs outside the accepted range are clamped rather than rejected.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Torque Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/torque-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/torque-calculator" target="_blank" rel="noopener">Torque Calculator — RevenueLab</a> (2026).</p>
Source: [Torque Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/torque-calculator) (2026).