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FACTDOUBLE function in Google Sheets

Returns the "double factorial" of a number.

=FACTDOUBLE(value)

FACTDOUBLE syntax and parameters

One argument, one required.

  • valuenumberRequired

    The number or reference to a number whose double factorial will be calculated and returned.

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 Excel

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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Related functions

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