Force & Torque Converter
Engineering-friendly converter for force (N, kN, kgf, lbf) and torque (N·m, N·mm, kgf·m, kgf·cm, lbf·ft, lbf·in). Switch tab, choose units, enter a value: we normalize to a base unit and convert accurately.
Converted 100 N → 10.1972 kgf
Force result
10.1972
Reference tables
| Force | |
|---|---|
| Unit | To Newton (N) |
| 1 N | 1 |
| 1 kN | 1000 |
| 1 kgf | 9.80665 |
| 1 lbf | 4.4482216152605 |
| Torque | |
|---|---|
| Unit | To N·m |
| 1 N·m | 1 |
| 1 N·mm | 0.001 |
| 1 kgf·m | 9.80665 |
| 1 kgf·cm | 0.0980665 |
| 1 lbf·ft | 1.3558179483314 |
| 1 lbf·in | 0.1130 |
How the converter works
We normalize to a base unit and then convert to the target unit.
General formula (linear)
\( \text{target} = \text{value} \times \frac{\text{factorFrom}}{\text{factorTo}} \)
For force, the base unit is Newton (N). For torque, the base unit is Newton-metre (N·m).
Force basics
1 kgf is the force due to 1 kg mass under standard gravity: 1 kgf = 9.80665 N. This is common in older manuals.
Torque basics
Torque is force × lever arm. Converting lbf·ft to N·m is common when matching tools to engineering specs.
Formula (LaTeX) + variables + units
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General formula (linear) \( \text{target} = \text{value} \times \frac{\text{factorFrom}}{\text{factorTo}} \) For force, the base unit is Newton (N). For torque, the base unit is Newton-metre (N·m).
- No variables provided in audit spec.
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - NIST — SI units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/metric-si/si-units
Last code update: 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.