Calculate how gravity affects the passage of time according to General Relativity.
Gravity Source
Calculation Results
Enter parameters to calculate time dilation
About this calculator
Overview
Gravitational time dilation is a phenomenon predicted by Einstein's General Relativity where time moves slower in regions of stronger gravitational potential (closer to a massive body).
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Pro Tips
The effect is extremely small for Earth, but significant for black holes and high-precision satellites like GPS.
The formula uses the Schwarzschild radius: rₛ = 2GM/c².
Time dilation approaches infinity as you reach the event horizon (r = rₛ).
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Fun Facts
"GPS satellites must correct for time dilation (gaining about 45 microseconds per day) to provide accurate locations."
"Clocks on the peak of Mt. Everest run slightly faster (by nanoseconds) than clocks at sea level."
"In the movie 'Interstellar', the extreme gravity of Gargantua caused 1 hour on Miller's planet to equal 7 years on Earth."
