What is Newton's Second Law?

F = ma — Force equals mass times acceleration. A 10 kg object accelerating at 2 m/s² experiences a net force of 20 Newtons.

How many Newtons is 1 pound?

1 pound-force (lbf) = 4.448 Newtons. Or conversely, 1 Newton = 0.2248 lbf.

Force Calculator (F = ma)

Quick answer: Enter mass and acceleration to find force, or solve for mass or acceleration from the other two values.

Apply Newton's Second Law (F = ma) to solve for force, mass, or acceleration. Enter any two values to find the third. Results in Newtons (N) and pound-force (lbf).

Last reviewed: April 2026Report an error

Solve For

Mass (kg)

Acceleration (m/s²)

Force

98.00 N

Result calculated for force.

Force (N)

98.00

Force (lbf)

22.03

How to Use This Force (F=ma) Calculator

1Select what you want to solve for: force, mass, or acceleration.
2Enter the two known values in SI units (kg and m/s²).
3Read the result in Newtons and pound-force.

Frequently Asked Questions

: F = ma — Force equals mass times acceleration. A 10 kg object accelerating at 2 m/s² experiences a net force of 20 Newtons.
: 1 pound-force (lbf) = 4.448 Newtons. Or conversely, 1 Newton = 0.2248 lbf.

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Force Calculator (F = ma)

How to Use This Force (F=ma) Calculator

Frequently Asked Questions

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