Force Calculator
Enter mass and acceleration (or force and one of them) to compute the missing quantity via F = m·a.
Input Data
Results
At a glance:Force is an interaction that changes an object's motion. Newton's second law states the net force equals mass times acceleration: F = m·a (more generally F = dp/dt). Given any two of F, m, a, the third follows: a = F/m, m = F/a. The newton (N) is the SI unit, 1 N = 1 kg·m/s². This tool lets you pick which variable to solve for and enter the other two. Force is a vector; F here is the net (resultant) force. Weight is the special case W = m·g under gravity.
Formula
F = m·a
a = F/m
m = F/a
How to Use
- Select which quantity to solve for (force, mass or acceleration).
- Enter the other two values.
- The calculator returns the result.
Case Studies
Pushing a box
m = 20 kg, a = 3 m/s².
F = 20×3 = 60 N.
Net force needed to accelerate it.
FAQ
Is F the net force?
Yes — the vector sum of all forces. If forces balance, net F = 0 and a = 0 even if individual forces are nonzero.
How is force related to weight?
Weight W = m·g is the gravitational force; it is a particular F in F = m·a where a = g. On Earth a 10 kg mass weighs ~98 N.
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References
Content review: Calculatorism Physics Team. Results are for reference only; please refer to the relevant authorities for the official figures.