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Excel BITLSHIFT Function

The BITLSHIFT function returns a decimal number shifted left by a specified number of bits.

bitlshift function 1


=BITLSHIFT (number, shift_amount)


  • Number (required): The number on which you perform a left shift operation.
  • Shift_amount (required): An integer value, specifying the number of bits to shift.

Return value

The BITLSHIFT function returns a numeric value.

Function notes

  1. The shift_amount argument can be positive or negative. When the shift_amount is a positive integer, the bits are shifted to the left, while the shift_amount is a negative integer, the bits are shifted to the right.
  2. When the BITLSHIFT function shifts the bits to the left, zero(s) will be added to the right of the binary representation of the number. Vice vera.
  3. The #NUM! error value occurs if:
    • number is not an integer.
    • number < 0 or > (2^48)-1.
    • the absolute value of Shift_amount > 53.
  4. The #VALUE! error value occurs if any of the supplied arguments are non-numeric.


Supposing, you want to get the decimal number shifted left or right by a specified number of bits in the table below. Please do as follows.

1. Copy the formula below into cell E5.


2. Then drag the fill handle down to the cells you want to apply this formula too. The results are as the following screenshot shows.

bitlshift function 2


  1. We can directly input values in the two arguments in the formula. For example, the formula in cell E5 can be changed to:

    =BITLSHIFT (6, -2)

Relative Functions:

  • Excel EVEN Function
    The EVEN function rounds numbers away from zero to the nearest even integer.

  • Excel EXP Function
    The EXP function returns the result of the constant e raised to the nth power.

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