Tempo de Hubble
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Hubble Time calculator estimates the timescale of cosmic expansion using the Hubble constant (H₀). The formula t_H = 1/H₀ calculates the time it would take for the universe to expand at a constant rate. This value approximates the age of the universe under simplified models but doesn't account for factors like dark energy or acceleration.
To use this tool, input the Hubble constant in km/s/Mpc units. The result will be in billions of years. It's often used in cosmology to compare cosmic timescales or estimate the universe's age in idealized models, such as the Einstein-de Sitter universe.
Note: Hubble Time assumes linear expansion, ignoring acceleration or deceleration. The actual universe age (~13.8 billion years) is derived from more complex models that include dark matter, dark energy, and critical density.
Frequently asked questions
What formula is used in the Hubble Time calculation?
The formula used is t_H = 1/H₀, where H₀ is the Hubble constant measuring the universe's expansion rate.
Why isn't the result exactly the universe's age?
Hubble Time assumes constant expansion, but the universe actually accelerates or decelerates due to factors like dark matter and dark energy.
In which units should the Hubble constant be entered?
The Hubble constant should be provided in km/s/Mpc (kilometers per second per megaparsec). Typical values range between 65 and 75 km/s/Mpc.
What is this calculator used for in cosmology?
It helps estimate cosmic time scales in simplified models, such as theoretical calculations or comparisons between different expansion theories.