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Use our Falling Force Calculator to find falling force, gravity force, and net force with drag. Get fast, clear results for physics and math.
A falling force calculator helps you find the force on a falling object. It uses mass and gravity to give the force in newtons.
You can use this tool for quick physics math. It can also help with basic fall force checks. Just enter the mass, gravity, and drag force if needed.
The tool makes the math fast and clear. You won't need to solve the formula by hand.
The main falling force formula is:
F = m × g
Here, F means falling force in newtons (N).
m means mass in kilograms (kg).
g means gravity in m/s².
On Earth, you can use 9.80665 m/s². This is the standard value used by the calculator.
The formula comes from Newton's second law. Weight is the force of gravity on an object.
For an object with air drag, use:
Fnet = Fg − Fdrag
So, the full form is:
Fnet = (m × g) − Fdrag
Gravity pulls the object down. Air drag acts against the fall.
Height does not change the basic gravity force formula.
The force due to gravity stays:
Fg = m × g
But height can change the object's speed before impact. For a dropped object with no air drag, you can find its speed with:
v = √(2gh)
Here, h is the fall height in meters.
The impact force needs more data. It depends on how fast the object stops and how far it moves while stopping. So, a simple falling force calculator should not claim to give exact impact force from height alone.
Let's say a box has a mass of 20 kg.
Use Earth gravity:
g = 9.80665 m/s²
Now apply the formula:
F = m × g
F = 20 × 9.80665
F = 196.133 N
So, the falling force is:
F = 196.13 N
Now add 30 N of air drag.
Fnet = 196.133 − 30
Fnet = 166.133 N
So, the net falling force is:
Fnet = 166.13 N
Think of it like a tug of war. Gravity pulls down. Drag pulls up. The net force is what remains.
A 200 lb person has a mass of about 90.72 kg.
The force of gravity is about:
F = 90.72 × 9.80665
F ≈ 889.64 N
But force and fall speed are not the same thing.
A person's fall speed depends on height, body shape, air drag, acceleration force, and time. A person also reaches terminal velocity when air drag balances gravity.
So, you can't find exact fall speed from body weight alone.
This falling force calculator gives a simple physics solution.
It first changes mass to kilograms. Then it uses F = mg. If drag is added, it subtracts drag from gravity.
The result is shown in newtons. This makes the tool useful for school work, basic force math, and quick checks.
The calculator follows a simple physics rule:
Fnet = ma
For free fall with no drag, acceleration is gravity. Thus:
F = mg
A newton equals one kilogram meter per second squared.
This means the math stays simple. Keep mass in kg and gravity in m/s². The answer will be in N.
The falling force calculator gives a quick way to find gravitational force. It uses the trusted formula F = mg.
It also supports drag force for a more useful net force result. For fall height and impact force, more data is needed.
Use the calculator for fast, clear, and simple falling force math.
The formula is F = m × g. Mass must be in kg.
Falling force is measured in newtons, or N.
Not the basic gravity force. Height can affect speed before impact.
Yes. Convert pounds to kilograms first. Then use F = mg.
It can find gravity force and net force with drag. Exact impact force needs stopping time or stopping distance.
For Earth, use 9.80665 m/s². Gravity can vary slightly by location.