Introduction
Force is a push or pull on an object. When you kick a ball, push a door, or lift a book, you use force. This calculator helps you find force using Newton's Second Law. This law says that force equals mass times acceleration. Mass is how much matter is in an object. Acceleration is how fast something speeds up or slows down.
To find force, you need to know two things: the mass of the object (in kilograms) and how fast it accelerates (in meters per second squared). Just type in these numbers, and the calculator will tell you the force in Newtons. A Newton is the unit we use to measure force. This tool makes it easy to solve force problems for homework, science projects, or to understand the world around you.
How to use our Force Calculator
Enter the values you know and pick what you want to find. The calculator will solve for force, mass, or acceleration using Newton's Second Law (F = m × a).
Calculate Mode: Click one of the four buttons at the top to choose what you want to calculate - Force, Mass, Acceleration, or Weight.
Quick Examples: Pick a preset example from the dropdown menu to see common force calculations like a car speeding up or a falling object.
Force: Type the force value and pick its unit (like Newtons or pounds-force). This field turns on when calculating mass or acceleration.
Mass: Type the mass value and pick its unit (like kilograms or pounds). This is how heavy the object is.
Acceleration: Type how fast the speed changes and pick its unit (like meters per second squared). For weight calculations, this is set to Earth's gravity. You can also explore objects in free fall where gravity is the only acceleration acting on them.
Precision: Choose how many numbers to show in your answer, from 3 to 12 figures or let it pick automatically.
Notation: Pick how to display big or small numbers - Standard, Scientific (with powers of 10), or Engineering notation.
Unit System: Choose SI metric units, Imperial units, or Mixed to quickly set all units at once.
Calculate Button: Press this blue button to get your answer after entering your values.
Understanding Force in Physics
Force is a push or pull that can make objects move, stop, or change direction. Think of force like the effort you use to push a shopping cart or throw a ball. In physics, we measure force in units called Newtons (N), named after the famous scientist Isaac Newton.
Newton's Second Law of Motion
The main rule for force comes from Newton's Second Law, which says that force equals mass times acceleration (F = m × a). This means three important things work together:
- Force (F) - The push or pull on an object, measured in Newtons
- Mass (m) - How much matter is in an object, measured in kilograms
- Acceleration (a) - How fast something speeds up or slows down, measured in meters per second squared
Common Force Examples in Daily Life
Forces are everywhere around us. When you kick a soccer ball, your foot applies force to make it fly. When a car speeds up from a red light, the engine creates force to push it forward. Even gravity is a force - it pulls objects toward Earth at about 9.8 meters per second squared. The gravitational force between any two objects depends on their masses and the distance between them.
Weight vs Mass
Weight and mass are different things. Mass is how much matter something has and stays the same everywhere. Weight is the force of gravity pulling on that mass. An astronaut has the same mass on Earth and the Moon, but weighs less on the Moon because it has weaker gravity. This weight