AJ Designer

Resistance Unit Converter

result equals value times from-factor divided by to-factor

Resistance Conversion =

1 Ohm (Ω) = 0.001 Kilohm (kΩ); 1e-6 Megohm (MΩ)

Solution in Other Units

UnitValue
Ohm (Ω)1
Kilohm (kΩ)0.001
Milliohm (mΩ)1000
Megohm (MΩ)1e-6

Show Your Work

Result = Value × (Source factor ÷ Target factor)
Base unit for this resistance family is Ohm (Ω).
1 Ohm (Ω) = 1 Ohm (Ω)
1 Ohm (Ω) = 0.001 Kilohm (kΩ)
1 Ohm (Ω) = 1e-6 Megohm (MΩ)
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How It Works

This converter uses the ohm (Ω) as its base unit. Each supported resistance unit has a known factor relative to the ohm, so the calculator converts your source value into ohms first and then divides by each target-unit factor to populate the full resistance table.

Example Problem

Convert 680 kilohms to ohms and megohms for a resistor-selection check.

  1. Start with the source value: 680 kΩ.
  2. Use the relationship 1 kΩ = 1,000 Ω.
  3. Convert to the base unit: 680 × 1,000 = 680,000 Ω.
  4. Convert ohms to megohms by dividing by 1,000,000.
  5. 680,000 Ω = 0.68 MΩ.
  6. So 680 kΩ is 680,000 Ω or 0.68 MΩ.

Key Concepts

Resistance measures how strongly a material or component opposes electric current. The SI base unit is the ohm, but electronics and power work routinely use milliohms, kilohms, and megohms. Because these units are scaled versions of the same electrical quantity, conversion is a direct factor-based process through the ohm.

Applications

  • Circuit design: reading and comparing resistor values in ohms, kilohms, and megohms
  • Power systems: checking very small connection or contact resistances in milliohms
  • Insulation testing: interpreting large resistance values in megohms
  • Sensors and instrumentation: translating resistance readings into the unit scale used by schematics and reports

Common Mistakes

  • Mixing up milliohm and megohm values, which differ by nine orders of magnitude
  • Treating resistance like impedance in AC problems even though impedance can include reactive components
  • Dropping unit prefixes when copying component values between datasheets, schematics, and calculations

Frequently Asked Questions

How do you convert resistance units?

Convert the source value to ohms first, then divide by the target-unit factor. That is the base-unit method used by this calculator.

What is the formula for converting ohms, kilohms, and megohms?

Use Result = Value × (source factor ÷ target factor), where each factor is defined relative to the ohm.

How many ohms are in 1 kilohm?

One kilohm equals 1,000 ohms.

How many ohms are in 1 megohm?

One megohm equals 1,000,000 ohms.

What is a milliohm?

A milliohm is one thousandth of an ohm and is used for very low resistance values.

Why are resistance values written with so many prefixes?

Because practical resistance values span from tiny connection resistances to very large insulation or sensor values.

Can I use this for resistor values and electrical testing?

Yes. Any true resistance value can be converted across the supported units here.

Resistance Conversion Formula

Resistance conversions use the ohm as the common base unit. The calculator converts your source resistance into ohms first, then expresses the same electrical resistance in every other supported unit below.

Result = Value × (Source factor ÷ Target factor)
  • Result — the converted measurement in the target resistance unit
  • Value — the original measurement you enter
  • Source factor — the factor that maps the source unit to the common base unit
  • Target factor — the factor used to express the same base-unit value in the target unit

Worked Examples

Electronics

How do you convert 4,700 ohms to kilohms?

A resistor value is shown in ohms, but the schematic notation uses kilohms.

  • Start with the source value: 4,700 Ω.
  • Use the relationship 1 kΩ = 1,000 Ω.
  • Divide: 4,700 ÷ 1,000 = 4.7 kΩ.
  • That is also 0.0047 MΩ.
  • So the resistor value is 4.7 kilohms.
  • The same resistance is 4.7 kΩ.

A resistance of 4,700 Ω equals 4.7 kΩ.

This is a classic resistor-value conversion used in almost every electronics workflow.

Insulation Testing

What is 2.2 megohms in ohms?

An insulation reading is in megohms, but your calculation needs the raw ohm value.

  • Start with the source value: 2.2 MΩ.
  • Use the relationship 1 MΩ = 1,000,000 Ω.
  • Multiply: 2.2 × 1,000,000 = 2,200,000 Ω.
  • That is also 2,200 kΩ.
  • So the same resistance is 2,200,000 ohms.
  • The resistance is 2.2 MΩ or 2,200,000 Ω.

A resistance of 2.2 MΩ equals 2,200,000 Ω.

Large-resistance unit conversions are common in insulation and sensor work.

Power Connections

How do you convert 15 milliohms to ohms?

A contact-resistance or bus-bar value is listed in milliohms and needs to be compared with ohm-based calculations.

  • Start with the source value: 15 mΩ.
  • Use the relationship 1 mΩ = 0.001 Ω.
  • Multiply: 15 × 0.001 = 0.015 Ω.
  • That is also 15,000 µΩ if you need an even smaller-scale reference.
  • So the same resistance is 0.015 ohms.
  • The resistance is 0.015 Ω.

A resistance of 15 mΩ equals 0.015 Ω.

Very small resistances show up in power, switching, and interconnect measurements.

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