How to Use This Tool
Enter a Value
Type the resistance you want to convert into the input field. Decimals and scientific notation are supported.
Choose Your Units
Pick a From unit and a To unit from the dropdowns. Use the swap button to flip them instantly.
Read the Result
The converted value appears instantly below the inputs. Click Copy to put it on your clipboard.
See All Conversions
Scroll down to see the same resistance converted into every other supported unit at once.
Frequently Asked Questions
Is this tool really free?
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Yes, completely free with no limits and no sign-up. Everything runs in your browser.
Is my data sent to a server?
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No. All conversion math happens directly in your browser. Nothing you type is ever sent anywhere.
What units are supported?
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8 units: Ohm, Milliohm, Microohm, Kilohm, Megohm, Gigohm, Abohm, and Statohm.
What is an Ohm?
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The ohm is the standard unit of electrical resistance. It measures how much a material opposes the flow of electric current. Named after Georg Simon Ohm.
What is a Kilohm?
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A kilohm is 1,000 ohms. Resistors in the kilohm range are extremely common in electronics. Often written as k on schematics.
What is a Megohm?
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A megohm is 1,000,000 ohms. Used for insulation resistance testing and high-impedance circuits.
What is a Gigohm?
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A gigohm is 1,000,000,000 ohms. Used for extremely high resistance measurements like insulation testing and electrostatic applications.
What is an Abohm?
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An abohm is one billionth of an ohm (0.000000001 ohm). It is a CGS electromagnetic unit found in older physics literature.
What is a Statohm?
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A statohm is about 898.8 billion ohms. It is a CGS electrostatic unit used in theoretical physics.
Does it update instantly?
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Yes. All results recalculate as soon as you change any input.
What Is Resistance Converter?
Resistance Converter is a free tool that converts between 8 electrical resistance units right in your browser. It covers the practical ohm scale (microohm through gigohm) and the historical CGS units (abohm and statohm). Nothing you type is ever sent anywhere - all math runs locally on your device.
The result updates live as you type, and a full conversion table shows the same resistance in every other unit at once. Use the swap button to flip your units instantly, or copy the result to your clipboard in one click.
Features Explained
8 Resistance Units
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Convert between Ohm, Milliohm, Microohm, Kilohm, Megohm, Gigohm, Abohm, and Statohm.
Ohm Scale
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From Microohm (millionths) through Milliohm, Ohm, and Kilohm up to Megohm and Gigohm, covering everything from wire resistance to insulation testing.
CGS Units
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Abohm (one billionth of an ohm) and Statohm (about 899 billion ohms) for historical physics references.
All Conversions at Once
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Below the main result, a scrollable table shows the same resistance converted into every other unit simultaneously.
Instant Conversion
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The result updates live as you type. No Convert button needed.
Swap Button
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Click the swap button between the From and To dropdowns to flip them instantly.
Copy to Clipboard
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Click Copy to put the converted value on your clipboard in one click.
High Precision
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Results are displayed with up to 10 significant figures for accurate engineering and scientific work.
Input Validation
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Invalid input shows a clear error message instead of a wrong result.
100% Browser-Based
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All conversion math runs directly in your browser. Nothing you type is ever sent to any server.
Who Is This Tool For?
Electrical Engineers
Convert between ohms, kilohms, and megohms for circuit design, impedance matching, and component selection.
Electronics Hobbyists
Convert resistor values between ohms and kilohms when reading color codes and datasheets.
Students
Convert between resistance units for physics and electrical engineering homework.
Teachers
Demonstrate resistance unit conversions in real time during physics and electronics lessons.
Physicists
Convert between SI ohms and CGS units (abohm, statohm) for historical references.
Electricians
Convert insulation resistance measurements between megohms and gigohms for safety testing.
Telecommunications Engineers
Convert impedance values between ohms and kilohms for transmission line design.
Audio Engineers
Convert speaker and headphone impedances between ohms for matching and compatibility.
Power Engineers
Convert grounding and fault resistance measurements between milliohms and ohms.
Lab Technicians
Convert instrument readings between resistance units for calibration and reporting.
PCB Designers
Convert trace and via resistance between milliohms and ohms for layout verification.
Automotive Engineers
Convert sensor and wiring resistance between milliohms and ohms for diagnostics.
Medical Device Engineers
Convert electrode and lead resistance between ohms and kilohms for device specifications.
Solar Installers
Convert panel and string resistance between milliohms and ohms for system commissioning.
HVAC Technicians
Convert motor winding resistance between ohms for troubleshooting.
Embedded Developers
Convert pull-up and pull-down resistor values between ohms and kilohms.
Ham Radio Operators
Convert antenna and feed line impedances between ohms.
Battery Engineers
Convert internal resistance between milliohms and ohms for cell testing.
Researchers
Convert between SI and CGS resistance units for cross-referencing publications.
Quality Engineers
Convert test measurement resistance between units for compliance reporting.
Makers
Convert resistor values when building circuits, amplifiers, and power supplies.
Insulation Testers
Convert megohm and gigohm readings for insulation resistance verification.
Cable Technicians
Convert cable and connector resistance between milliohms and ohms.
Anyone
Quickly convert any resistance between 8 units for any reason.
Tips for Best Results
Metric prefixes for resistance
1 ohm = 1,000 milliohms = 1,000,000 microohms. 1 kilohm = 1,000 ohms. 1 megohm = 1,000,000 ohms. 1 gigohm = 1,000,000,000 ohms.
Common resistor values
Standard resistor values follow the E-series: 10, 22, 47, 100, 220, 470, 1k, 2.2k, 4.7k, 10k, 100k, 1M ohms.
Kilohms on schematics
On circuit diagrams, 4.7k means 4,700 ohms and 1M means 1,000,000 ohms. Use the converter to verify exact values.
Megohms for insulation
Good insulation typically measures in the megohm or gigohm range. Low megohm readings may indicate a problem.
Milliohms for connections
Wire resistance, contact resistance, and solder joint resistance are usually measured in milliohms.
Use the All Conversions table
Scroll below the main result to see the same resistance in every other unit at once.
Use the swap button
Click the swap button between the dropdowns to flip From and To instantly.
Copy the result
Click Copy next to the result to put the value on your clipboard.
Scientific notation for extremes
For very small (microohms) or very large (gigohms) values, type scientific notation like 5e-6 or 2.5e9.
Privacy is built in
Nothing you type is ever sent to any server. All math runs in your browser.
Privacy & Security
This tool runs 100% in your browser. Your files stay entirely on your own device. Nothing is uploaded, nothing is shared, and no server, advertiser, or third party has access to your files.
If a tool saves your work on your own device, you can remove it at any time using the Clear All button. Some tools rely on an external service to return their result; in those cases, only the minimum data required for the request is sent, and never your files or content. Any ads shown on this page run in an isolated frame and cannot read, touch, or transmit anything you upload, paste, type, or download here. Advertisers may see standard visit information like your IP address and which page you're on, as described in our Privacy Policy, but your data itself stays fully under your control.
