Electric resistance converter: compare ohms, prefixes, abohms, and statohms
An electric resistance converter expresses one resistance across the SI ohm family, definition-equivalent units such as volts per ampere and reciprocal siemens, and historical CGS resistance units that still appear in older electrical references.
What this electric resistance converter covers
This page converts a non-negative resistance across microohms, milliohms, ohms, kilohms, megaohms, gigaohms, volts per ampere, reciprocal siemens, abohms, and statohms.
That makes it useful for both practical resistor and wiring work and for interpreting historical resistance units that are not part of today's standard SI workflow. It also covers the common search intent behind an ohm converter or electrical resistance unit converter by keeping the source unit, target unit, and ohm baseline visible at the same time.
Ohms stay as the baseline
The converter first resolves the entered value into ohms. Every supporting result is then just the same resistance written at another SI scale or in one of the CGS reference systems.
Keeping the ohm baseline visible is especially useful when you move between very small shunt or conductor values and much larger bias or insulation values.
1 mΩ = 10^-3 Ω; 1 µΩ = 10^-6 Ω
Small conductor and shunt values often read more naturally in milliohms or microohms.
Larger SI prefixes are common for resistor networks, sensing, and insulation checks.
1 Ω = 1 V/A = 1/S
The ohm can be read through Ohm's law as volts per ampere and as the reciprocal of the siemens conductance unit.
1 abΩ = 10^-9 Ω; 1 statΩ ≈ 8.9875517923 × 10^11 Ω
The historical CGS units are included so older references can be compared directly against the modern ohm baseline.
How to interpret the grouped sections
The SI section is the practical reference for modern circuit work because it spans the range from microohm shunts through gigaohm insulation values. The CGS section is there mainly to keep older electrostatic and electromagnetic references legible when they use abohms or statohms.
Highlighting the source unit inside the result sheet makes it easier to confirm the conversion path when you move between very different scales. The direct target unit is there for quick answers such as ohms to kilohms, kilohms to ohms, megaohms to ohms, or milliohms to microohms, while the grouped sheet keeps the surrounding magnitudes visible.
Resistance, conductance, and volts per ampere
Competitor resistance converters often include only a prefix ladder, but electrical resistance has two definition-level interpretations that are useful in practice. One ohm is one volt per ampere, which comes directly from Ohm's law. It is also the reciprocal of one siemens of conductance, so a larger resistance means a smaller conductance for an ideal ohmic path.
The calculator therefore reports the equivalent conductance in siemens and includes volts per ampere plus reciprocal siemens in the result sheet. Those rows are not a full circuit simulation, but they make the unit conversion more useful when the next step is checking whether a resistance belongs in a shunt, pull-up, divider, load, or insulation context.
R = V / I
Resistance equals voltage divided by current for an ideal ohmic path.
G = 1 / R
Conductance is the reciprocal of resistance when resistance is expressed in ohms.
Use the range note before applying the number
A converted resistance value is more useful when the scale is interpreted. Microohm and milliohm values commonly point to shunts, busbars, contacts, conductors, or measurement-lead effects. Ohm and kilohm values are common in loads, resistors, dividers, pull-ups, filters, sensors, and bias networks. Megaohm and gigaohm values are more likely to be about high-impedance measurement, leakage, or insulation context.
The range note and landmark table are designed to catch magnitude mistakes before they enter a design or troubleshooting workflow. For example, confusing 4.7 kΩ with 4.7 MΩ changes the resistance by a factor of 1,000, while confusing milliohms and microohms changes a low-resistance measurement by the same kind of order-of-magnitude jump.
What this converter does not estimate
This calculator does not estimate current, voltage drop, power dissipation, thermal drift, tolerance spread, resistor colour codes, parallel or series combinations, or material resistivity. It converts one resistance quantity into equivalent unit expressions only.
Use it as a reference and planning aid. If the next question is about circuit behaviour or conductor performance, switch to a calculator that models those relationships directly.
Frequently asked questions
Why are both mΩ and MΩ useful on the same page?
Because electrical work spans a very wide resistance range. Shunts, conductors, and contact paths can live in microohms or milliohms, while bias networks and insulation checks can live in megaohms or gigaohms.
What are abohms and statohms for?
They are historical CGS-system resistance units. They are not standard for modern circuit work, but they still appear in older electrical and electrostatics references.
Does this tell me the voltage drop across a resistor?
No. Voltage drop depends on current as well as resistance. This page only converts the resistance quantity itself between units.
Is an ohm the same as a volt per ampere?
Yes. One ohm is equivalent to one volt per ampere for an ideal ohmic path, which comes from the relationship R = V / I. That definition helps connect a resistance unit conversion back to Ohm's law without turning the page into a full circuit solver.
How do resistance and conductance relate?
Resistance and conductance are reciprocals. Resistance in ohms equals 1 divided by conductance in siemens, and conductance in siemens equals 1 divided by resistance in ohms. A high resistance therefore corresponds to a low conductance for the same ideal path.
When should I use milliohms or microohms?
Use milliohms or microohms when the resistance is very small and plain ohms would be hard to read. Shunts, busbars, relay contacts, connectors, low-resistance windings, and conductor checks often live in this range, and test-lead resistance can matter.
When should I use megaohms or gigaohms?
Megaohms and gigaohms are useful for high-impedance biasing, leakage paths, insulation checks, and measurement inputs. They are still ordinary resistance values, but the scale usually means the practical concern is leakage, loading, or isolation rather than a simple load resistor.
Can this replace a resistor colour code calculator?
No. A colour code calculator decodes bands on a physical resistor and may include tolerance bands. This converter assumes you already know the resistance value and only need to express it in another unit such as ohms, kilohms, megaohms, or milliohms.
Does this calculate equivalent resistance for series or parallel resistors?
No. Series and parallel networks require circuit relationships that combine multiple resistors. This page converts one resistance quantity between units. Use a resistor-network or Ohm's law calculator when you need equivalent resistance, current, voltage, or power.
