Force, Mass & Acceleration Calculator (F = ma)

Newton's second law of motion states that force equals mass times acceleration (F = ma). This calculator solves for any one of the three variables given the other two, and also shows the weight of the object in Newtons.

kg
m/s²
N
Force
98.1 N
Mass
10 kg
Acceleration
9.81 m/s²
Weight
98.0665 N

Frequently asked questions

What is the difference between mass and weight?

Mass (kg) is the amount of matter in an object - it doesn't change with location. Weight (N) is the gravitational force acting on that mass and changes with gravity. On the Moon (g ≈ 1.62 m/s²), a 10 kg mass weighs only 16.2 N.

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