Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Escape Velocity Calculator

Calculates the escape velocity from a planet, moon, or star — the minimum speed an object needs to break free of its gravity without further propulsion. It uses √(2GM/r) with the universal gravitational constant.

Mass of the Body (kg)

Radius (distance from centre) (m)

Physics

Force Calculator (Newton's Second Law)

Calculate the net force on an object from its mass and acceleration using Newton’s Second Law, F = m·a. The cornerstone of classical mechanics, used everywhere from sizing motors to estimating brake forces to predicting how hard a ball will hit the ground.

Mass (kg)

Acceleration (m/s²)

Key differences

	Escape Velocity Calculator	Force Calculator (Newton's Second Law)
Category	Physics	Physics
Inputs required	2	2
Result	Escape Velocity (m/s)	Force (N)
What it does	Calculates the escape velocity from a planet, moon, or star — the minimum speed an object needs to break free of its gravity without further propulsion. It uses √(2GM/r) with the universal gravitational constant.	Calculate the net force on an object from its mass and acceleration using Newton’s Second Law, F = m·a. The cornerstone of classical mechanics, used everywhere from sizing motors to estimating brake forces to predicting how hard a ball will hit the ground.