Km/s per megaparsec to per second
Type a value in km/s/Mpc to get it in s⁻¹ instantly.
2.184×10⁻¹⁸s⁻¹
That's about the same as the Planck satellite value. Its Hubble time is 14.51 billion years.
Convert the other way: s⁻¹ to km/s/Mpc
What it means
How fast is that expansion?
The Hubble time 1/H₀ is close to, but not the same as, the age of the universe, which depends on how expansion changed over time (13.8 billion years).
The math
How to convert km/s/Mpc to s⁻¹
To convert km/s per megaparsec to per second, multiply by 3.241×10⁻²⁰.
Example: 67.4 km/s/Mpc × 3.241×10⁻²⁰ = 2.184×10⁻¹⁸ s⁻¹.
In the other direction, 1 s⁻¹ = 3.086×10¹⁹ km/s/Mpc.
Every unit
That expansion rate in every unit
Tables
km/s/Mpc to s⁻¹ conversion table
| km/s/Mpc | s⁻¹ |
|---|---|
| 50 km/s/Mpc | 1.62×10⁻¹⁸ s⁻¹ |
| 55 km/s/Mpc | 1.782×10⁻¹⁸ s⁻¹ |
| 60 km/s/Mpc | 1.944×10⁻¹⁸ s⁻¹ |
| 65 km/s/Mpc | 2.107×10⁻¹⁸ s⁻¹ |
| 67.4 km/s/Mpc | 2.184×10⁻¹⁸ s⁻¹ |
| 69.8 km/s/Mpc | 2.262×10⁻¹⁸ s⁻¹ |
| 70 km/s/Mpc | 2.269×10⁻¹⁸ s⁻¹ |
| 73 km/s/Mpc | 2.366×10⁻¹⁸ s⁻¹ |
| 75 km/s/Mpc | 2.431×10⁻¹⁸ s⁻¹ |
| 80 km/s/Mpc | 2.593×10⁻¹⁸ s⁻¹ |
| 100 km/s/Mpc | 3.241×10⁻¹⁸ s⁻¹ |
s⁻¹ to km/s/Mpc conversion table
| s⁻¹ | km/s/Mpc |
|---|---|
| 50 s⁻¹ | 1.543×10²¹ km/s/Mpc |
| 55 s⁻¹ | 1.697×10²¹ km/s/Mpc |
| 60 s⁻¹ | 1.851×10²¹ km/s/Mpc |
| 65 s⁻¹ | 2.006×10²¹ km/s/Mpc |
| 67.4 s⁻¹ | 2.08×10²¹ km/s/Mpc |
| 69.8 s⁻¹ | 2.154×10²¹ km/s/Mpc |
| 70 s⁻¹ | 2.16×10²¹ km/s/Mpc |
| 73 s⁻¹ | 2.253×10²¹ km/s/Mpc |
| 75 s⁻¹ | 2.314×10²¹ km/s/Mpc |
| 80 s⁻¹ | 2.469×10²¹ km/s/Mpc |
| 100 s⁻¹ | 3.086×10²¹ km/s/Mpc |
Quick answers
Quick answers
- How many s⁻¹ is 1 km/s/Mpc?
- 1 km/s/Mpc is 3.241×10⁻²⁰ s⁻¹.
- How many s⁻¹ is 10 km/s/Mpc?
- 10 km/s/Mpc is 3.241×10⁻¹⁹ s⁻¹.
- How many s⁻¹ is 67.4 km/s/Mpc?
- 67.4 km/s/Mpc is 2.184×10⁻¹⁸ s⁻¹.
The units
About these units
Km/s per megaparsec (km/s/Mpc)
The standard unit of H₀.
Per second (s⁻¹)
H₀ in SI, as a rate.
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