Explanation

In the worksheet shown, we have race results for an 800m race.

The goal is to display time in minutes, seconds, and hundredths of a second (centiseconds).

Dealing with times that include fractional seconds can be tricky in Excel.

Custom number format for time in hundredths of a second

However, several quirks in Excel make working with fractional seconds more difficult than you would expect.

This article explains these quirks and provides tips and formulas to make the process easier.

Note when you add a placeholder for hours, you must enter time starting with hours.

Custom number format for time in hundredths of a second

In short, you must enter time according to specified placeholders.

For example, enter “01:45.73” for “1 minute, 45.73 seconds”.

Often, it is easiest to enter the complete time again.

Custom number format for time in hundredths of a second

This is a puzzling problem.

The first step is to multiply by 1440.

Excel stores dates and times as serial numbers where one day is 1.0.

Custom number format for time in hundredths of a second

MOD is a shortcut here.

Multiplying 0.847 x 60 results in 50.82 seconds:

This matches the value for seconds seen in cell C5.

TIME simply removes the decimal part (0.5) during calculation.

Custom number format for time in hundredths of a second

Likewise, if we make a run at provide 30.5 forseconds, the decimal portion is discarded.

The TIME function is useful when you want to assemble a proper time inside another formula.

TIMEVALUE Function

The Excel TIMEVALUE function converts a time represented as text into a proper Excel time.

Excel ignores custom time format when editing

For example, MOD(10,3) = 1.

The result of MOD carries the same sign as the divisor.

Editing hundredths of a second with a helper column

Extracting fractional seconds from time in Excel

A formula to create time with fractional seconds

Excel formula: Convert Excel time to decimal hours

Excel formula: Convert decimal minutes to Excel time

Excel formula: Convert decimal seconds to Excel time

Excel TIME function

Excel SECOND function

Excel TIMEVALUE function

Excel MOD function

Custom number format for time in hundredths of a second

Excel ignores custom time format when editing

Editing hundredths of a second with a helper column

Extracting fractional seconds from time in Excel

A formula to create time with fractional seconds