What height should I enter?

Enter the height difference relative to the zero level used in your problem.

Is spring energy always positive?

In the ideal Hooke-law model, stored elastic energy is nonnegative because displacement is squared.

Use it when distance from the planet's center matters, such as satellites or high orbits.

Calculate gravitational potential energy near Earth, orbital gravitational potential energy, or elastic spring potential energy.

Potential energy type

Near-surface gravitational Orbital gravitational energy Elastic spring energy

Solve for

Energy Mass Height

Mass

Height

Celestial bodycustom gravitational acceleration

Quick scenarios

Potential energy

6,864.7

Parameters: mass 70 kg, gravitational acceleration 9.807 m/s², height 10 m; energy 6,864.7 J

Impact speed without drag: 14.005 m/s. Speed in kilometers per hour: 50.417 km/h.

Energy graph for mass 70 kg - linear relationship

English results split potential-energy intent between the common near-surface mgh model and spring energy.

P E = m g h

PE is gravitational potential energy near a surface, m mass, g gravity and h height.

P E = \frac{1}{2} k x^{2}

k is spring constant and x displacement from equilibrium.

Near-surface gravitational potential energy depends on height relative to a chosen reference level.

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

Calculate kinetic energy, mass or speed from formula mv², with optional relativistic energy for high speeds.

Calculate weight from mass and gravity, gravitational force between two bodies, or local gravity at altitude.

Calculate fall time, impact speed, height, gravity and optional drag estimates for free-fall scenarios.