My 1980s motorcycle manual lists the cylinder head torque as 1.2 kgf·m, but my torque wrench only has N·m and ft·lb scales. What do I set it to?

1.2 kgf·m × 9.80665 ≈ 11.8 N·m (about 8.7 ft·lb). Set your wrench to 11.8 N·m, or the nearest available setting.

I see a torque spec written as 'm·kgf' instead of 'kgf·m' — is that a different unit?

No — 'm·kgf', 'kg·m', and 'kgf·m' all refer to the same unit (kilogram-force meter), just written in different orders by different manual translators. The conversion factor is the same: multiply by 9.80665 to get N·m.

A vintage car manual gives 4.5 kgf·m for wheel bolts — that seems low compared to modern cars. Is the manual correct?

4.5 kgf·m ≈ 44.1 N·m, which is on the lower end but plausible for smaller, lighter vintage wheels with smaller stud diameters than modern vehicles. Always follow the manual's spec for that specific vehicle rather than comparing to modern torque values.

Kilogram-Force Meters to Newton-Meters Converter

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From

Precision4 dp

1 Kilogram-Force Meter = 9.8066 Newton-Meter

Key Formulas

Newton-Meter → Foot-Pound

ft·lb = N·m × 0.737562

Foot-Pound → Newton-Meter

N·m = ft·lb × 1.35582

Newton-Meter → Inch-Pound

in·lb = N·m × 8.85075

Inch-Pound → Newton-Meter

N·m = in·lb × 0.112985

Formula

N·m = kgf·m × 9.80665

Older Japanese and some European service manuals — particularly for motorcycles and small engines manufactured before the widespread adoption of SI units in technical documentation — give torque specs in kilogram-force meters (kgf·m, sometimes written kg·m or m·kgf). Modern torque wrenches are calibrated in N·m or ft·lb, so converting a legacy kgf·m spec is necessary to set the wrench correctly.

Source: NIST SP 811, Table B.9

Last reviewed: 2026-06-11 · see our methodology

Frequently Asked Questions

Real-World Examples

A common cylinder head bolt torque spec on a classic motorcycle.

1 kgf·m = 9.81 N·m

Wheel axle nut torque on an older Japanese motorcycle.

3.5 kgf·m = 34.32 N·m

Spark plug torque listed in an older small-engine manual.

0.5 kgf·m = 4.9 N·m

Engine mounting bolt torque on some vintage cars.

10 kgf·m = 98.07 N·m

nm to ft lb ft lb to nm nm to in lb in lb to nm nm to kgf m

Kilogram-Force Meters to Newton-Meters Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

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