Excel Convert Time to Decimal: A Complete Guide
Learn how to convert time in Excel from hh:mm format to decimal numbers efficiently and accurately.
Excel Time Conversion to Decimal
Understanding Time Conversion
Converting time in Excel (formatted as hh:mm) to decimal is a common requirement, especially for time tracking and calculations. Here are some effective methods:
- Multiplication method: Multiply the time value by 24 to convert it to decimal hours.
- Using time functions: Extract hours, minutes, and seconds for precise calculations.
- CONVERT function: For Excel 365 users, utilize the CONVERT function for unit conversion.
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Function Syntax
XLOOKUP(lookup_value, lookup_array, return_array, [if_not_found], [match_mode], [search_mode])
lookup_value
The value to search for
lookup_array
The range to search within
return_array
The range containing the return values
if_not_found (Optional)
Value to return if no match is found
match_mode (Optional)
0: Exact match; -1: Exact or next smaller; 1: Exact or next larger
search_mode (Optional)
1: First-to-last; -1: Last-to-first; 2: Binary search
Usage Examples
Basic Example

Looking up contact phone number for a specified customer ID in customer data table
=XLOOKUP(A2, B2:B10, C2:C10)
Advanced Example

Cross-sheet lookup with multiple matching results
=XLOOKUP(A2, Sheet2!B:B, Sheet2!C:E, "Not Found", 0)
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Try NowTroubleshooting
#N/A Error
Common error when no match is found, can be handled by setting the if_not_found parameter
Data Type Mismatch
Ensure lookup value and range data types match
Performance Optimization
Use binary search mode to improve efficiency with large datasets
Excel Time Conversion to Decimal Comparison
Feature | XLOOKUP | VLOOKUP | INDEX+MATCH |
---|---|---|---|
Lookup Direction | Bi-directional | Right only | Bi-directional |
Multiple Column Return | Supported | Not supported | Supported |
Error Handling | Built-in | Additional handling needed | Additional handling needed |
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