Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Ohms to Megaohms
Convert Ω to MΩ instantly, then review the formula, assumptions, and rounding guidance.
Electrical unitsInstant result
Decimals
Formula result = input × 1 ÷ 1000000. 1 Ω = 0 MΩ
Common examples
One value, several units
Kiloohms0.001 kΩ
Megaohms0 MΩ
Milliohms1,000 mΩ
Conversion table
| Ω | MΩ |
|---|---|
| 1 Ω | 0 MΩ |
| 2 Ω | 0 MΩ |
| 5 Ω | 0 MΩ |
| 10 Ω | 0 MΩ |
| 25 Ω | 0 MΩ |
| 50 Ω | 0.0001 MΩ |
| 100 Ω | 0.0001 MΩ |
Conversion chart
1 Ω0 MΩ
5 Ω0 MΩ
10 Ω0 MΩ
25 Ω0 MΩ
50 Ω0.0001 MΩ
Worked example
1 megaohm equals 1,000,000 ohms.
Unit definition
Ohms (Ω) One ohms equals 1 ohm.
Unit history
Ohms is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert Ω to ohm.
3. Convert the base value to MΩ and apply your display precision.
Understand the result before using it
Ohms to Megaohms converts a value measured in Ohms (Ω) into the equivalent value in Megaohms (MΩ). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1 ÷ 1000000
Assumptions
- Ohms and Megaohms represent the same resistance quantity.
- The input is expressed in Ω; the output is expressed in MΩ.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 Ω = 0.000001 MΩ. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a Ω measurement in a document that expects MΩ.
- Compare a ohms value with a value reported in megaohms.
- Check the Ω-to-MΩ arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse Ω with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Ohms to Megaohms?
result = input × 1 ÷ 1000000 Using the displayed relationship, 1 Ω equals 0.000001 MΩ.
How many Megaohms are in one Ohms?
One Ohms is 0.000001 Megaohms. The displayed digits may be rounded.
Can I reverse the Ω to MΩ conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts MΩ back to Ω.
Is the Ohms to Megaohms result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.