This tool converts a value of Planck's constant from **Joule-seconds (J·s)** to **Electronvolt-seconds (eV·s)**.

Key Information:

• **Planck's Constant (h):** A fundamental constant in quantum mechanics relating energy to frequency. Standard value is $6.62607015 \times 10^{-34} \text{ J·s}$.
• **Electronvolt (eV):** A unit of energy commonly used in atomic and particle physics. It's defined as the energy gained by an electron moving through a potential difference of 1 Volt.
• **Conversion Factor:** $1 \text{ eV} = 1.602176634 \times 10^{-19} \text{ J}$

Formula: $$ \small h_{\text{eV·s}} = \frac{h_{\text{J·s}}}{1.602176634 \times 10^{-19}} $$