Electric Resistance Converter
Convert between resistance units: ohm, milliohm, microohm, kilohm, megaohm, gigaohm.
Conversion Results
Ohm (Ω)
1
Milliohm (mΩ)
1000
Microohm (µΩ)
1000000
Kilohm (kΩ)
0.001
Megaohm (MΩ)
0.000001
Gigaohm (GΩ)
1e-9
About this tool
Electrical resistance, measured in ohms (Ω), is a fundamental property of electrical circuits. Different units—milliohms, microohms, kilohms, megaohms, and gigaohms—are commonly used depending on the magnitude of resistance being measured, from tiny resistances in conductors and switches to enormous resistances in insulators. Converting between these units is essential for electricians, electronics engineers, circuit designers, and anyone working with power systems, electronic devices, sensors, or telecommunications equipment. This tool enables instant conversion between all standard resistance units, eliminating manual calculation errors.
Simply select your source unit and target unit, enter the resistance value you want to convert, and the tool calculates the result immediately. Whether you're reading component specifications from datasheets, designing circuit boards with precise resistance values, troubleshooting electrical systems, testing insulation integrity in cables and equipment, or analyzing measurement data from multimeters and laboratory instruments, this converter handles all standard resistance units with high precision. The interface supports both SI prefixes (milli, micro, kilo, mega, giga) and traditional ohm-based measurements.
This tool is particularly valuable for professionals and enthusiasts across electrical and electronic fields. Circuit engineers designing resistor networks, electricians testing continuity and resistance in installations, embedded systems developers working with sensor resistances, telecommunications technicians managing impedance in transmission lines, and students learning electrical principles all benefit from quick and accurate conversions. The tool requires no specialized knowledge: simply enter your value and get precise results instantly.
Frequently Asked Questions
Code Implementation
# Electric resistance unit converter
CONVERSION_FACTORS = {
'ohm': 1,
'milliohm': 1e-3,
'microohm': 1e-6,
'kilohm': 1e3,
'megaohm': 1e6,
'gigaohm': 1e9,
}
def convert_resistance(value: float, from_unit: str, to_unit: str) -> float:
"""Convert between resistance units"""
if from_unit not in CONVERSION_FACTORS:
raise ValueError(f"Unknown unit: {from_unit}")
if to_unit not in CONVERSION_FACTORS:
raise ValueError(f"Unknown unit: {to_unit}")
# Convert to ohm first, then to target
in_ohm = value * CONVERSION_FACTORS[from_unit]
return in_ohm / CONVERSION_FACTORS[to_unit]
def display_all(value: float, unit: str):
"""Show value in all units"""
for target_unit, factor in CONVERSION_FACTORS.items():
converted = convert_resistance(value, unit, target_unit)
print(f" {converted:.6g} {target_unit}")
# Ohm's law
def ohms_law(voltage=None, current=None, resistance=None):
"""Calculate the missing value using V = I * R"""
if voltage is None:
return current * resistance
if current is None:
return voltage / resistance
return voltage / current
# Examples
print("1 kilohm =")
display_all(1, 'kilohm')
print(f"V=5V, R=1kOhm -> I={ohms_law(voltage=5, resistance=1000)*1000:.1f} mA")
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