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Escape Velocity Calculator

Science & Engineering

Second cosmic velocity · any body by mass & radius

Quick Answer

Escape Velocity Calculator: Second cosmic velocity · any body by mass & radius. Escape Velocity Calculator uses standard science & engineering formulas to compute accurate results instantly.

How it works

  1. 1Escape velocity v=√(2GM/R), independent of spacecraft mass
  2. 2Enter body mass M (kg) and radius R (km)
  3. 3Earth: 11.19 km/s; Moon: only 2.38 km/s
  4. 4At this speed (tangential) the craft escapes gravity for good

Celestial body

kg
km
Escape velocity11.19km/s
Equivalent：11,186 m/s
Orbital velocity：7.91 km/s
Escape velocity is the idealized minimum initial speed (no drag, tangential launch); real rockets also overcome atmospheric and gravity losses, so the required ΔV is higher. Orbital (surface) velocity = escape / √2. Mean radius and standard mass are used — oblateness and terrain cause local variation.

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How to Use

  1. Enter known quantities: fill values and confirm units in the Escape Velocity Calculator.
  2. Instant solution: unknowns solve live with the formula shown transparently.
  3. Use constant/material tables: standard physical constants and material data are listed on this page.
  4. Compare conditions: change inputs to compare scenarios.

Key Points

  • Escape Velocity Calculator is a free online science & engineering tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Second cosmic velocity · any body by mass & radius.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Escape Velocity Calculator formula

Escape Velocity Calculator uses standard science & engineering formulas to compute accurate results instantly.

FAQ

How do I use the Escape Velocity Calculator?
Open the page and fill in the input fields — results update automatically. Second cosmic velocity · any body by mass & radius.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on CODATA recommended constants and standard physics formulas. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Escape Velocity Calculator[EB/OL]. https://www.yijiansuan.com/en/c/science/escape-velocity

Results provided by this tool are for reference only and do not constitute professional advice.