Calculate force, mass, or acceleration using Newton's Second Law (F = ma) — the fundamental equation of classical mechanics.
How it works
- Enter two of the three variables: Force, Mass, or Acceleration.
- Leave the variable you want to solve for completely blank.
- The calculator computes the remaining physical property using Newton's F=ma theorem.
Frequently asked questions
What are typical everyday force values?
Lifting a 1 kg book against gravity requires about 9.81 N. A car engine might produce 5,000–50,000 N of thrust.
What is the difference between mass and weight?
Mass (kg) is the amount of matter and does not change. Weight (N) = mass × gravitational acceleration and varies by location.
What is net force?
The sum of all forces acting on an object. Newton's Second Law applies to net force — individual forces must be added vectorially.