Force Converter Free Online
Convert force between SI (newton, kilonewton), CGS (dyne), gravitational (kgf, gram-force) and imperial (pound-force, ounce-force, ton-force) units. 1 N = 1 kg·m/s².
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Force Converter Features
SI & Gravitational
Newton (SI, derived from kg·m/s²) plus gravitational units (kgf, lbf) that include g = 9.80665 m/s² standard gravity.
9 Units
From dynes (10⁻⁵ N) used in CGS physics to meganewtons used in rocketry, plus everyday lbf and kgf.
Engineering Ready
Bolt torque specs in lbf, mechanical loads in kN, structural calcs in MN. All side-by-side.
Live Conversion
Type a value, see all units instantly.
Swap Units
Quick reverse with the swap button.
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All math runs in your browser.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Full force conversion | ||
| Live conversion | ||
| All-units result panel | ||
| Bulk CSV / Excel conversion | — | |
| REST API access | — | |
| Custom precision settings | — |
Frequently Asked Questions
1 N = 0.2248 lbf. Conversely, 1 lbf = 4.4482 N. A 100 N force is roughly 22.48 pounds — about the weight of a small bowling ball.
kg is mass; kgf is force = mass × standard gravity. 1 kgf = 9.80665 N. On Earth, 1 kg of mass exerts 1 kgf of weight, so they are often interchanged in everyday use.
Weight is a specific kind of force — the pull of gravity on a mass. F = m·g. So weight (in N) = mass (in kg) × 9.81. A 70 kg person weighs 686 N or 154 lbf.
1,000,000 newtons. The Saturn V rocket produced 35 MN of thrust at liftoff. SpaceX Starship Super Heavy ~74 MN. Bridge cable forces are also commonly stated in MN.
CGS unit of force = 10⁻⁵ N = 1 g·cm/s². Used in physics texts and biology (cell mechanics). 1 N = 100,000 dyn.