Escape Velocity Calculator

• •Use the Escape Velocity Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
• •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
• •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
• •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.

The Escape Velocity Calculator is a free, browser-based calculation tool for engineers, students, and technical professionals. Calculate the minimum velocity to escape a planet's gravitational field. Essential for rocket science and orbital mechanics. It implements standard formulas and supports both metric (SI) and imperial unit systems with automatic unit conversion. All calculations are performed instantly in your browser with no data sent to a server. Use this calculator as a quick reference and sanity-check tool during design, analysis, and learning. Always verify results against primary engineering references and applicable standards for any safety-critical application.

The Escape Velocity Calculator determines minimum speed to break free from a celestial body's gravity. Earth's escape velocity is ~11.2 km/s. This is fundamental to space exploration — every rocket must achieve at least this velocity. Escape velocity depends only on the planet's mass and radius, not the escaping object.

• !Confusing with orbital velocity (escape is √2 times orbital).
• !Thinking escape velocity depends on object mass.