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Easily calculate orbital speed with our free Circular Velocity Calculator. Learn the formula, how it works, and why it matters in simple words.
Ever wondered how fast an object must move to stay in orbit? That’s where a Circular Velocity Calculator comes in handy. We built this tool so you can find orbital speed with just mass and radius. No stress, no tough math just clear results.
Circular velocity is the speed an object needs to stay in a stable orbit around another body, like a satellite circling Earth. If the object goes slower, gravity pulls it down. If it goes faster, it may escape the orbit.
The formula for circular velocity is simple:
v = √(GM/r)
Here,
v = circular velocity (m/s)
G = gravitational constant (6.674 × 10⁻¹¹ m³/kg·s²)
M = mass of the central body (kg)
r = radius of orbit (m)
This formula shows one key fact: circular velocity doesn’t depend on the satellite’s mass, only the central body’s mass and distance.
Our Circular Velocity Calculator uses this exact formula. You only need to enter the mass of the central object (like Earth, Sun, or another planet) and the orbital radius. The tool does all the heavy lifting and gives you the speed in units you choose, like m/s, km/s, mph, or even knots.
It’s that simple. You don’t need to know physics inside out the tool handles the math and explains each step.
Take Earth. Its mass is about 5.97 × 10²⁴ kg, and the radius is about 6,371 km. Put these into the formula:
v = √(6.674 × 10⁻¹¹ × 5.97 × 10²⁴ / 6.371 × 10⁶)
v ≈ 7,910 m/s
That means an object must travel at about 7.9 km/s to stay in low Earth orbit.
You’ll save time. You’ll avoid errors. And you’ll get step-by-step details that show not just the answer, but also how the answer is reached. Whether you’re a student, hobbyist, or space fan, this tool is for you.
Our Circular Velocity Calculator makes orbital speed simple. Instead of doing long math on paper, you’ll get instant, accurate results with a clear breakdown. Try it once, and you’ll see how easy orbital mechanics can be.
It’s the speed needed to keep an object in a circular orbit.
No, it depends only on the central body’s mass and the orbit radius.
Circular velocity keeps you in orbit. Escape velocity is higher it’s the speed needed to break free from gravity.
Yes. Just enter their mass and the orbit radius, and the calculator works the same way.