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Excel

FACTDOUBLE function in Excel

Returns the double factorial of a number

=FACTDOUBLE(number)

FACTDOUBLE syntax and parameters

One argument, one required.

  • numbernumberRequired

    The value for which to return the double factorial. If number is not an integer, it is truncated.

FACTDOUBLE examples

Formulas you'll actually reuse.

  1. 7‼ = 7 × 5 × 3 × 1 — every other factor:

    =FACTDOUBLE(7)

    Result105

  2. 8‼ = 8 × 6 × 4 × 2 — pairings of 8 people into couples, times 2⁴:

    =FACTDOUBLE(8)

    Result384

FACTDOUBLE in Google Sheets

Same name — your formula ports as-is.

Try FACTDOUBLE in the playground

Edit the example — nothing to install.

Preloaded with the FACTDOUBLE formula from Example 1 — change anything and watch it respond.

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