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IMREAL Function
Summary
The Excel IMREAL function extracts the real coefficient from a complex number expressed in x+yi or x+yj format. It provides a straightforward way to isolate the real part of complex mathematical expressions used in engineering and scientific calculations.
Syntax
IMREAL(inumber)Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
| inumber | Complex Number/Text |
Yes | The complex number from which to extract the real coefficient |
Using the IMREAL Function
IMREAL is perfect for complex number calculations in engineering, physics, and mathematics. Use it when you need to separate the real component from complex results generated by other engineering functions like IMSUM, IMPRODUCT, or IMPOWER.
Common IMREAL Examples
Extract Real Part from Basic Complex Number
=IMREAL("6-9i")Returns 6, the real coefficient of the complex number 6-9i.
Real Part with j Notation
=IMREAL("-2+3j")Returns -2 from the complex number using engineering j notation.
Positive Imaginary with j
=IMREAL("5+12j")Returns 5, isolating the real component.
Frequently Asked Questions
Common Errors and Solutions
#VALUE! error
Cause: Invalid complex number format
Solution: Use correct 'x+yi' or 'x+yj' format. Use COMPLEX() function to create properly formatted complex numbers.
#NUM! error
Cause: Empty or non-complex input
Solution: Ensure inumber parameter contains a valid complex number.
Notes
- Any valid complex number format works: 3+4i, 3-4i, -3+4i, -3-4i
- Supports both i (math) and j (engineering) notations
- Combine with COMPLEX() to create complex numbers from real/imaginary parts
- Real part can be positive, negative, or zero
Compatibility
Available in: Excel 2007, Excel 2010, Excel 2013, Excel 2016, Excel 2019, Excel 2021, Microsoft 365
Not available in: Excel 2003 and earlier
Content last reviewed: December 9, 2025
Update frequency: As needed
Excel versions tested: Excel 2007+