Home / Converters / ft-lb to Nm Converter

Converters

ft-lb to Nm Converter

Convert torque instantly between ft·lbf, N·m, in·lbf and kgf·m, then control precision, batch mixed units, inspect tolerance ranges, save repeats, and export auditable results.

Torque conversion studio

ft·lbf ↔ N·m, without the usual unit confusion

Type in any torque field and the other units update immediately. Control display precision, inspect tolerance ranges, convert mixed-unit lists, save recent conversions, and verify the definition-derived factor before using a setting.

4 live units · mixed batch · share/export

Foot pound-forceft·lbf · lb-ft · ft-lbNewton-meterN·m · SI torque unitInch pound-forcein·lbf · useful for smaller torque valuesKilogram-force meterkgf·m · legacy metric-force torque

Current conversion1 ft·lbf = 1.35582 N·m

12 in·lbf · 0.138255 kgf·m

Input tolerance rangeOffDisplay round-trip delta0

Precision modeDigitsInput tolerance ±%Default unit for unitless batch rows

Quick references (not specs)

Source: ft·lbf1 ft·lbf = 1.3558179483314 N·m1 ft·lbf = 12 in·lbf exactly1 kgf·m = 9.80665 N·m

Paste mixed torque values

One value per line. Units can be mixed: 75 ft-lb, 100 Nm, 250 in-lb, 10 kgf-m. Fractions such as 7 1/2 ft-lb are accepted.

Ready.

Batch summary

4 rows ready to convert.

Rows are conversions only. A value that resembles a common fastener setting is not a recommendation. For critical tightening work, use the manufacturer’s specification and an appropriate calibrated tool.

Input	ft·lbf	N·m	in·lbf	kgf·m

Definition-derived conversion basis

The torque factor comes from the pound-force and foot definitions, not from a rounded lookup table. Cross-check the published factors in the NIST Guide to the SI torque table.

1 lbf = 4.4482216152605 N
1 ft = 0.3048 m
1 ft·lbf = 4.4482216152605 × 0.3048 = 1.3558179483314 N·m

Reverse: 1 N·m = 0.737562149277 ft·lbf.
Small-torque bridge: 1 ft·lbf = 12 in·lbf exactly.
Legacy metric-force bridge: 1 kgf·m = 9.80665 N·m.
Mental estimate: N·m × 3/4 ≈ ft·lbf, useful only as a rough check.

Torque vs energy: N·m and J share dimensions, and “foot-pound” is also used in energy contexts, but this page treats the values strictly as torque. The physical quantity and use case matter.

Do not turn a conversion chart into a torque specification. Fastener torque depends on the actual manufacturer/service specification and application conditions.

Filterable quick-reference table

Common numeric references in both directions. These are conversion examples, not recommended settings.

Filter values

ft·lbf	N·m	in·lbf	kgf·m

Ready. Type in any torque field.

Core conversion workflows

Start with a broad dimension converter or jump to the most common metric/imperial pairs. Specialist converters remain available from the full hub.

All 134 converters

Unit ConverterAll-in-one measurement conversion Length ConverterMetric and imperial length units Weight ConverterMass and weight units Temperature ConverterCelsius, Fahrenheit and Kelvin Inches → CMExact 2.54 conversion CM → InchesReverse exact length conversion KG → LBSKilograms to pounds LBS → KGPounds to kilograms °F → °CFahrenheit to Celsius °C → °FCelsius to Fahrenheit Miles → KMMiles to kilometers KM → MilesKilometers to miles

Practical guide and verification

What this conversion means

Foot-pound force and newton-metre are both torque units. The conversion is exact enough for engineering work when you keep sufficient precision: 1 ft·lbf ≈ 1.355818 N·m for practical conversion.

Worked check

A quick reasonableness check is direction: converting ft·lbf to N·m should increase the numeric value by about 35.6%. If the number becomes smaller, the conversion direction was probably reversed.

Where errors happen

Torque specifications are often rounded by manufacturers, so a converted value may not exactly match a service manual that published both units independently. Do not treat a rounding difference as a new mechanical tolerance.