Force Calculator
The Force Calculator (Force = Mass × Acceleration) is a versatile online physics tool based on Newton’s Second Law of Motion. It can calculate force, mass, or acceleration depending on which values you enter.
Simply choose what you want to find - Force, Mass, or Acceleration - and input the two known values. The calculator instantly computes the missing one and converts between multiple unit systems for convenience.
Supported units include:
Force: newton (N), kilonewton (kN), pound-force (lbf), dyne, kip
Mass: kilogram (kg), gram (g), pound (lb), ounce (oz), tonne (t)
Acceleration: meter per second squared (m/s²), foot per second squared (ft/s²), inch per second squared (in/s²), centimeter per second squared (cm/s²), kilometer per second squared (km/s²)
This tool is ideal for students, engineers, and physics learners who need accurate and flexible calculations in different unit systems.
FAQs
What is a Force Calculator?
A Force Calculator is an online tool that applies Newton’s Second Law of Motion to find the relationship between force, mass, and acceleration. You can choose to calculate Force (F), Mass (m), or Acceleration (a) depending on the known values.
How do I calculate force, mass, or acceleration?
The calculator uses the core formula F = m × a. Depending on what you want to find, you can rearrange it as:
1. To find Force: F = m × a
2. To find Mass: m = F / a
3. To find Acceleration: a = F / m
These formulas let you quickly determine any variable if you know the other two.
How to find acceleration with force and mass?
You can calculate acceleration using Newton’s Second Law of Motion: a = F / m, where F is the force in newtons (N) and m is the mass in kilograms (kg). Simply divide the total applied force by the object’s mass to find acceleration in meters per second squared (m/s²). For example, a 20 N force applied to a 5 kg object produces an acceleration of 4 m/s².
What is the formula for force?
The formula for calculating force is based on Newton’s Second Law:
Force (F) = Mass (m) × Acceleration (a)
This means that the greater the mass or acceleration, the greater the force required.
Make sure to use consistent units - newtons (N) for force, kilograms (kg) for mass, and meters per second squared (m/s²) for acceleration.
Is weight a force?
Yes - weight is a force caused by gravity acting on an object’s mass. The formula for weight is W = m × g, where m is mass and g is the acceleration due to gravity (≈ 9.81 m/s² on Earth). For instance, a 70 kg person has a weight of about 686.7 newtons. Weight changes with gravity, but mass stays constant everywhere in the universe.
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