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Easily calculate neutron velocity from energy with our free Neutron Velocity Calculator. Quick, accurate, and simple tool for students and researchers.
Ever wondered how fast a neutron moves? Our Neutron Velocity Calculator helps you find that in seconds. You just enter the neutron’s energy, and the tool instantly shows its velocity in meters per second, kilometers per second, or even as a fraction of light speed.
This calculator was built for students, engineers, and science lovers who want quick and accurate neutron speed results — without getting lost in complex physics.
Neutron velocity is the speed at which a neutron travels. It depends on the neutron’s kinetic energy. When the energy increases, the neutron moves faster. In nuclear science, understanding neutron speed helps us predict how nuclear reactions behave.
For example, in a nuclear reactor, “fast neutrons” and “thermal neutrons” act very differently. That’s why knowing their velocity is so important.
The formula used in our calculator comes from the classic text Introduction to Nuclear Engineering by Lamarsh and Baratta (2001):
Vn = 1.383 × 10⁶ × √E / 100
Where:
So, if you know the neutron’s energy, you can find its velocity by taking the square root of that energy, dividing by 100, then multiplying by 1.383 × 10⁶.
Let’s say the neutron energy is 500 eV.
Vn = 1.383 × 10⁶ × √(500) / 100
Vn = 1.383 × 10⁶ × 22.36 / 100
Vn = 309,248.2 m/s
That means the neutron moves at about 309 km per second — pretty fast, right?
Using this calculator is as easy as pie.
In an instant, you’ll see the full step-by-step process:
You’ll even see how the energy value was converted and how each step of the math was done.
Measuring how fast neutrons move is key in many fields. In nuclear reactors, it helps control chain reactions safely. In medical imaging, it helps produce accurate neutron-based scans. And in scientific experiments, it helps understand the tiny world inside atoms.
The faster the neutron moves, the more energy it carries — and that affects how it interacts with matter.
Our Neutron Velocity Calculator turns a tough physics equation into a quick and simple result. You don’t need to memorize formulas or worry about conversions. Just enter your values and get accurate results in seconds.
Whether you’re a student learning about nuclear science or a researcher verifying data, this tool saves time and helps you stay focused on what matters — understanding the physics behind it all.
The neutron velocity depends on its energy. For example, a neutron with 500 eV of energy moves at about 309,248 m/s.
You can input energy in eV, keV, MeV, or Joules, and the result can be shown in m/s, km/s, cm/s, mph, or as a fraction of light speed (c).
Not easily. Neutrons have no charge, so scientists use time-of-flight methods or detectors that estimate speed based on energy.
They’re directly related. When energy increases, velocity increases too. The relationship follows the formula Vn = 1.383 × 10⁶ × √E / 100.