Weight to Force Calculator

Q: What is the difference between weight and mass?

Mass is the amount of matter in an object and is constant everywhere. Weight is the force of gravity acting on that mass, which changes depending on the gravitational field (e.g., you weigh less on the Moon than on Earth).

Q: Why is the result in Newtons (N)?

The Newton (N) is the SI unit for force. It's derived from the base units of mass (kg), length (m), and time (s), where 1 N = 1 kg·m/s².

Q: What is the standard gravity of Earth?

The standard value for Earth's gravitational acceleration (g) is 9.80665 m/s². This is the default value used in the calculator when 'Earth' is selected.

Instantly calculate the force exerted by an object based on its mass and the gravitational acceleration. Accurate, fast, and easy to use.

Mass (m)

Mass Unit

Gravitational Acceleration (g)

Select a Celestial Body (or Custom)

Force (F)

98.07 N

How to Use the Calculator

To find the force from an object’s weight, follow these simple steps:

Enter the Mass: Input the mass of the object in the “Mass (m)” field.
Select Mass Unit: Choose the appropriate unit for your mass (Kilograms, Grams, Pounds, or Ounces).
Set Gravitational Acceleration: You can either select a celestial body like Earth, Moon, or Mars to use its standard gravity, or choose “Custom” to enter your own value in the “Gravitational Acceleration (g)” field. The value is in m/s².
View the Result: The calculator will automatically show you the resulting force in Newtons (N). You can also click the “Calculate” button to refresh the result.

The Formula Used

The calculation is based on Newton’s Second Law of Motion, which is simplified to the weight formula when dealing with gravity. The formula is:

Force (F) = Mass (m) × Gravitational Acceleration (g)

Force (F): The resulting force, measured in Newtons (N).
Mass (m): The amount of matter in the object. For this formula, we convert the input mass into its base unit, kilograms (kg).
Gravitational Acceleration (g): The acceleration at which objects fall towards the center of a celestial body, measured in meters per second squared (m/s²).

Frequently Asked Questions

What is the difference between weight and mass?

Mass is an intrinsic property of matter, representing how much “stuff” an object contains. It’s constant everywhere. Weight is the force of gravity acting on that mass. So, your mass is the same on Earth and the Moon, but your weight is much less on the Moon due to its lower gravity.

Why is the result in Newtons (N)?

The Newton (N) is the standard SI (International System of Units) unit for force. One Newton is defined as the force required to accelerate a one-kilogram mass at a rate of one meter per second squared (1 N = 1 kg·m/s²).

What is the standard gravity of Earth?

The standard gravitational acceleration on the surface of the Earth is defined as 9.80665 m/s². Our calculator uses this value as the default for “Earth”.