Newton’s Second Law Calculator (F = m·a)

Enter two values to calculate the third. Choose what you want to solve for.

Pick which value you want to calculate.
Newtons (N).
Kilograms (kg).
Meters per second squared (m/s²).
F = m × a
m = F / a
a = F / m
Use consistent SI units.
If acceleration is 9.81 m/s², force equals weight (in Newtons).
Example: weight on Earth.