Kinetic Energy Calculator (KE = ½mv²)
Kinetic Energy Calculator (KE = ½mv²)
Kinetic energy is the energy an object has due to its motion. Choose which quantity you want to solve for, enter the other two known values, and this calculator computes the missing one.
Kinetic energy grows with the square of velocity, not linearly — doubling an object's speed quadruples its kinetic energy, which is exactly why high-speed collisions are so disproportionately more damaging than slow ones, and why small increases in vehicle speed translate into much larger increases in crash severity. This squared relationship is one of the more counter-intuitive but important facts in introductory physics, and it's worth comparing against the related Potential Energy Calculator when working through problems that involve energy converting from height into motion, like an object falling or a roller coaster descending a hill.
- The core formula is KE = ½mv², so a 10 kg object moving at 5 m/s has KE = 0.5 × 10 × 5² = 125 J.
- Kinetic energy grows with the square of velocity - doubling speed quadruples kinetic energy, which is why high-speed collisions are so much more damaging than slow ones.
- See the Potential Energy Calculator for gravitational energy, which converts to kinetic energy as an object falls (conservation of mechanical energy).
How do I calculate kinetic energy?
Multiply half the mass by the velocity squared: KE = ½ × m × v².
What is the kinetic energy of a 10 kg object moving at 5 m/s?
KE = 0.5 × 10 × 5² = 125 J.
Kinetic Energy Calculator (KE = ½mv²)
Kinetic energy is the energy an object has due to its motion. Choose which quantity you want to solve for, enter the other two known values, and this calculator computes the missing one.
Kinetic energy grows with the square of velocity, not linearly — doubling an object's speed quadruples its kinetic energy, which is exactly why high-speed collisions are so disproportionately more damaging than slow ones, and why small increases in vehicle speed translate into much larger increases in crash severity. This squared relationship is one of the more counter-intuitive but important facts in introductory physics, and it's worth comparing against the related Potential Energy Calculator when working through problems that involve energy converting from height into motion, like an object falling or a roller coaster descending a hill.
- The core formula is KE = ½mv², so a 10 kg object moving at 5 m/s has KE = 0.5 × 10 × 5² = 125 J.
- Kinetic energy grows with the square of velocity - doubling speed quadruples kinetic energy, which is why high-speed collisions are so much more damaging than slow ones.
- See the Potential Energy Calculator for gravitational energy, which converts to kinetic energy as an object falls (conservation of mechanical energy).
How do I calculate kinetic energy?
Multiply half the mass by the velocity squared: KE = ½ × m × v².
What is the kinetic energy of a 10 kg object moving at 5 m/s?
KE = 0.5 × 10 × 5² = 125 J.