Force Calculator
Force from mass and acceleration (Newton's second law).
kg
m/s²
Formula: F = m × a
Worth Knowing
Newton's second law is deceptively simple but easy to misapply if you're not careful with units: mass must be in kilograms and acceleration in meters per second squared for the result to come out in newtons directly, so a common source of wrong answers is plugging in weight (a force, in pounds or kilograms-force) where the formula expects mass. It's also worth remembering this gives net force — if multiple forces act on an object (gravity, friction, an applied push), this calculator's result represents the combined effect of all of them, not any single force in isolation.
How to Use
- Enter Mass into the first field of the Force Calculator.
- Fill in the rest: Acceleration.
- Your result appears instantly as you type — there's no submit button or page reload.
Formula
F = m × a