Kg to Newtons Calculator
Convert mass in kilograms to force in newtons using gravitational acceleration.
Converting Kilograms to Newtons
Mass and weight are different physical quantities. Mass (kg) measures the amount of matter. Weight is the gravitational force acting on that mass, measured in newtons (N). This calculator converts mass to weight force using \(F = m \times g\).
Formula
$$F = m \times g$$\(F\) is force in newtons, \(m\) is mass in kilograms, and \(g\) is gravitational acceleration in m/s². On Earth, the standard value is \(g = 9.80665\) m/s².
Gravity on Different Bodies
Gravitational acceleration varies by celestial body. The Moon's gravity is about 1.62 m/s² and Mars is about 3.72 m/s². Select a preset or enter a custom value for other planets, altitudes, or engineering assumptions.
Frequently Asked Questions
Is a kilogram a unit of weight?
No. A kilogram measures mass. Weight is a force measured in newtons. On Earth, a 1 kg mass weighs approximately 9.81 N.
Why use 9.80665 m/s² for Earth?
9.80665 m/s² is the standard gravitational acceleration defined by international convention for physics and engineering calculations.
Does altitude change gravity?
Yes, slightly. Gravity decreases with altitude, but the change is small for most everyday and engineering purposes near Earth's surface.
How much would I weigh on the Moon?
Multiply your Earth mass by 1.62 m/s². A 70 kg person weighs about 113 N on the Moon versus about 686 N on Earth.
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