Torque Converter
Convert moment of force values across SI, US customary, gravitational metric, and CGS torque units. The converter uses newton-meters as the base route and keeps torque distinct from energy even though the dimensions are related.
Base unit
N m
Supported units
6
Useful for
fasteners
Live converter
Torque conversion inputs
Convert moment of force values across newton-meters, pound-force feet, pound-force inches, kilogram-force meters, kilogram-force centimeters, and dyne centimeters.
Converted result
135.581794833 N m
Input
100 lbf ft
Output unit
N m
Base method
newton-meters
Torque in every supported unit
| Unit | Converted value | Unit name | Note |
|---|---|---|---|
| N m | 135.581794833 | Newton-meters | SI torque unit. |
| lbf ft | 100 | Pound-force feet | US customary moment of force. |
| lbf in | 1,200 | Pound-force inches | Common fastener torque unit. |
| kgf m | 13.8254954376 | Kilogram-force meters | Gravitational metric force moment. |
| kgf cm | 1,382.54954376 | Kilogram-force centimeters | Small torque rating unit. |
| dyn cm | 1,355,817,948.33 | Dyne centimeters | CGS moment of force. |
Base unit
N m
Supported units
6
Useful for
fasteners
Convert fastener, motor, and mechanics torque values
Fastener specifications
Convert lbf ft, lbf in, and N m values when service manuals, torque wrenches, or parts sheets use different labels.
Full comparison table
Review every supported engineering unit after one input so adjacent checks do not require repeated typing.
SI base route
Trace each answer through a standard SI base unit instead of relying on an isolated result.
Torque conversion formula
The converter normalizes every source value to newton-meters, then divides by the target unit's newton-meter factor.
Working formulas
Base conversion
N m = value x N m per source unit
Every torque value is first expressed as newton-meters.
Target value
target value = N m / N m per target unit
The newton-meter value is scaled into the selected target unit.
Pound-force foot
1 lbf ft = 1.3558179483314004 N m
This factor uses the international foot and pound-force.
Symbols
- N m - newton-meter
- SI unit used for moment of force or torque.
- lbf ft - pound-force foot
- Common US customary torque unit.
Torque dimensions, factor chains, and specification limits
This live converter recalculates a moment of force for one entered value. Its comparison table is useful for unit translation, but it is not a fastener chart and does not choose a tightening target, sequence, lubricant condition, or safety margin.
Force multiplied by lever arm
Torque is the moment of force: force multiplied by perpendicular distance. The SI expression is newton metre. Although a newton metre has the same base dimensions as a joule, the quantity is still torque and should remain labeled N m rather than J.
The pound-force foot factor follows the international foot, the defined avoirdupois pound, and conventional standard gravity. Pound-force inches use the same force with a lever arm one twelfth as long, so 1 lbf ft equals exactly 12 lbf in within this unit system.
Worked conversion: 100 pound-force feet
100 lbf ft = 135.581794833 N m = 1,200 lbf in
The newton-metre value is shown to the converter's 12-significant-digit display limit. The lbf-in relationship is exact because one international foot is exactly 12 inches.
Copy the quantity and the unit
Keep the force marker in inch-pound torque units: lbf ft and lbf in are clearer than ambiguous shorthand. Round the converted result no more finely than the wrench setting or source specification supports.
A converted number does not replace the original service instructions. Joint condition, thread treatment, tightening sequence, calibration, and manufacturer tolerances can matter even when the arithmetic is correct.
Use this page for a specific torque-unit translation. Use the power converter only when the source quantity is already a rate such as watts or horsepower.
Open the power converter for rate quantitiesLimits to keep with the result
- The page converts torque units; it does not calculate clamp load, joint friction, or an approved tightening value.
- Converting torque to power also requires angular speed, so horsepower or watts cannot be inferred from torque alone.
- Preserve whether the source uses lbf ft or lbf in to avoid a twelvefold specification error.
Why torque needs explicit unit labels
Avoids torque-energy confusion
- Torque is expressed as newton-meters, not joules, even though both share compatible dimensions.
- Pound-force feet and pound-force inches differ by a factor of 12, a common fastener-spec mistake.
- The table makes gravitational metric and CGS units visible for older or specialized references.
Useful for mechanical checks
- Fastener, motor, lever-arm, and mechanics examples can be normalized through one route.
- The result table supports quick adjacent-unit audits.
- The formula block records the exact factor used for common US torque labels.
Useful for mechanical torque work
Mechanics
Convert torque wrench settings and service manual values.
Manufacturing teams
Normalize fastener and motor torque specs across mixed documentation.
Students
Practice torque unit conversions while keeping the SI distinction visible.
How it works in three quick steps.
Enter torque
Type the torque value from a fastener spec, motor note, mechanics problem, or test sheet.
Choose units
Select N m, lbf ft, lbf in, kgf m, kgf cm, or dyn cm.
Check the table
Use the table to compare adjacent torque units and confirm the newton-meter route.
Save torque conversions
Copy engineering result
Copy the converted value with source and target labels for calculations, specs, worksheets, or review notes.
Print the table
Print the comparison table when shop, lab, classroom, or field work needs multiple adjacent units visible.
Keep the SI route visible
Use the formula notes to confirm whether the conversion passed through N m, N, kg/m3, or m3/s.
Frequently Asked Questions
Is torque measured in joules?
How do lbf ft and lbf in relate?
What is the base unit used here?
Can I use this for motor torque ratings?
Why include kgf m and dyn cm?
Related engineering converters
About this torque converter
Torque conversion is more than a length conversion attached to a force label. A torque value describes moment of force, and engineering references often mix newton-meters, pound-force feet, pound-force inches, and gravitational metric units. A clear converter must preserve the force component and the lever-arm length together.
This page uses newton-meters as the base route and presents every supported output in one table. That makes it easier to audit fastener specs, motor ratings, lever-arm problems, and legacy references without silently replacing torque with energy terminology.
Who maintains this page
Ownership and review
Written and maintained by the Toolarithm editorial team. No review date is shown without a maintained editorial record. No independent professional review is claimed.
Methodology
Conversion factors are normalized to canonical units and checked in both directions. Exact definitions and offset formulas are preferred over rounded lookup values.
Read the editorial methodologyDates and sources
Review dates change only after a substantive method or content check.
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