Planck constants to reduced Planck constants
Type a value in h to get it in ħ instantly.
6.283ħ
That's 13× as much as the spin of an electron, while a rotating molecule is 1.51× more. That is about 6.283 quanta of ħ.
What it means
How much spin is that?
Angular momentum has the same dimensions as action, which is why the same constant, ħ, quantizes both.
The math
How to convert h to ħ
To convert Planck constants to reduced Planck constants, multiply by 6.28319.
Example: 1 h × 6.28319 = 6.28319 ħ.
In the other direction, 1 ħ = 0.159155 h.
Every unit
Your angular momentum in every unit
Tables
h to ħ conversion table
| h | ħ |
|---|---|
| 1×10⁻³⁴ h | 6.283×10⁻³⁴ ħ |
| 1×10⁻²⁰ h | 6.283×10⁻²⁰ ħ |
| 1×10⁻¹⁰ h | 6.283×10⁻¹⁰ ħ |
| 0.001 h | 0.00628319 ħ |
| 0.1 h | 0.628319 ħ |
| 1 h | 6.28319 ħ |
| 10 h | 62.8319 ħ |
| 100 h | 628.319 ħ |
| 10,000 h | 62,831.9 ħ |
ħ to h conversion table
| ħ | h |
|---|---|
| 1×10⁻³⁴ ħ | 1.592×10⁻³⁵ h |
| 1×10⁻²⁰ ħ | 1.592×10⁻²¹ h |
| 1×10⁻¹⁰ ħ | 1.592×10⁻¹¹ h |
| 0.001 ħ | 0.000159155 h |
| 0.1 ħ | 0.0159155 h |
| 1 ħ | 0.159155 h |
| 10 ħ | 1.59155 h |
| 100 ħ | 15.9155 h |
| 10,000 ħ | 1,591.55 h |
Quick answers
Quick answers
- How many ħ is 1 h?
- 1 h is 6.28319 ħ.
- How many ħ is 10 h?
- 10 h is 62.8319 ħ.
The units
About these units
Planck constants (h)
The unreduced constant, 2π times larger than ħ.
Reduced Planck constants (ħ)
The quantum step: 1.055 × 10⁻³⁴ J·s. Electron spin is exactly ħ/2.
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