Force Calculator (F = m·a)

Solve Newton's second law — force from mass and acceleration, or any variable from the other two.

Calculator Science & Engineering Updated Apr 19, 2026
How to Use
  1. Enter any two of F, m, a.
  2. The third computes instantly.
F = m × a
Result

Units

Newton
1 N = 1 kg · m/s²
Pound-force
1 lbf ≈ 4.448 N
kgf
1 kgf = 9.807 N (weight of 1 kg at g)
Dyne
1 N = 10⁵ dyne (CGS)

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