Electric Potential Converter

# Electric Potential (Voltage) Unit Converter
# Base unit: Volt (V)

POTENTIAL_TO_VOLT = {
    "V":   1,
    "mV":  1e-3,
    "µV":  1e-6,
    "nV":  1e-9,
    "kV":  1e3,
    "MV":  1e6,
    "GV":  1e9,
    "abV": 1e-8,     # Abvolt (CGS-EMU)
    "statV": 299.792458,  # Statvolt (CGS-ESU)
}

def convert_potential(value: float, from_unit: str, to_unit: str) -> float:
    """Convert electric potential (voltage) between units."""
    if from_unit not in POTENTIAL_TO_VOLT:
        raise ValueError(f"Unknown unit: {from_unit}")
    if to_unit not in POTENTIAL_TO_VOLT:
        raise ValueError(f"Unknown unit: {to_unit}")

    volts = value * POTENTIAL_TO_VOLT[from_unit]
    return volts / POTENTIAL_TO_VOLT[to_unit]

# Examples
print(f"1 kV = {convert_potential(1, 'kV', 'V'):.0f} V")
print(f"120 V = {convert_potential(120, 'V', 'mV'):.0f} mV")
print(f"1.5 V = {convert_potential(1.5, 'V', 'µV'):.0f} µV")
print(f"5 V = {convert_potential(5, 'V', 'kV'):.4f} kV")
print(f"1 statV = {convert_potential(1, 'statV', 'V'):.6f} V")