Newton (N)

Definition

The SI unit of force — one kg accelerated at one m/s².

History

The newton is the SI unit of force, named after Isaac Newton, defined as the force that accelerates one kilogram at one meter per second squared. It replaced a patchwork of older force units.

Where it is used

Newtons are used in physics and engineering to state loads and forces.

Typical uses include physics, engineering loads.

Conversion pages

These pages convert newton to or from another unit in force.

• Newton to pound-force
• Kilogram-force to newton

Other Force units

• Pound-force (lbf)
• Kilogram-force (kgf)
• Kilonewton (kN)

Sources

• NIST SP 811 NIST SP 811, App. B (force). lbf and kgf are exact via the pound/kilogram and standard gravity 9.80665 m/s² (CGPM 1901); SP 811 prints them rounded · Dataset reviewed Nov 11, 2026