Gravitational Potential Energy Calculator: Effortlessly Compute GPE in Joules

Multiply mass (kg), local gravity (N/kg), and height (m) to find gravitational potential energy; a 50 kg box raised 2 m on Earth stores ≈ 981 J (NASA Planetary Fact Sheet, https://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html).