32 bit single precision IEEE 754 binary floating point number 0 - 0111 1110 - 010 0000 0100 0000 0000 0001 converted to decimal base ten (float)

32 bit single precision IEEE 754 binary floating point 0 - 0111 1110 - 010 0000 0100 0000 0000 0001 to decimal system (base ten) = ?

1. Identify the elements that make up the binary representation of the number:

First bit (the leftmost) indicates the sign,
1 = negative, 0 = positive.


The next 8 bits contain the exponent:
0111 1110


The last 23 bits contain the mantissa:
010 0000 0100 0000 0000 0001

2. Convert the exponent from binary (base 2) to decimal (base 10):

The exponent is allways a positive integer.

0111 1110(2) =


0 × 27 + 1 × 26 + 1 × 25 + 1 × 24 + 1 × 23 + 1 × 22 + 1 × 21 + 0 × 20 =


0 + 64 + 32 + 16 + 8 + 4 + 2 + 0 =


64 + 32 + 16 + 8 + 4 + 2 =


126(10)

3. Adjust the exponent.

Subtract the excess bits: 2(8 - 1) - 1 = 127, that is due to the 8 bit excess/bias notation:

Exponent adjusted = 126 - 127 = -1


4. Convert the mantissa from binary (base 2) to decimal (base 10):

Mantissa represents the number's fractional part (the excess beyond the number's integer part, comma delimited)

010 0000 0100 0000 0000 0001(2) =

0 × 2-1 + 1 × 2-2 + 0 × 2-3 + 0 × 2-4 + 0 × 2-5 + 0 × 2-6 + 0 × 2-7 + 0 × 2-8 + 1 × 2-9 + 0 × 2-10 + 0 × 2-11 + 0 × 2-12 + 0 × 2-13 + 0 × 2-14 + 0 × 2-15 + 0 × 2-16 + 0 × 2-17 + 0 × 2-18 + 0 × 2-19 + 0 × 2-20 + 0 × 2-21 + 0 × 2-22 + 1 × 2-23 =


0 + 0.25 + 0 + 0 + 0 + 0 + 0 + 0 + 0.001 953 125 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0.000 000 119 209 289 550 781 25 =


0.25 + 0.001 953 125 + 0.000 000 119 209 289 550 781 25 =


0.251 953 244 209 289 550 781 25(10)

5. Put all the numbers into expression to calculate the single precision floating point decimal value:

(-1)Sign × (1 + Mantissa) × 2(Exponent adjusted) =


(-1)0 × (1 + 0.251 953 244 209 289 550 781 25) × 2-1 =


1.251 953 244 209 289 550 781 25 × 2-1 =


0.625 976 622 104 644 775 390 625

0 - 0111 1110 - 010 0000 0100 0000 0000 0001 converted from 32 bit single precision IEEE 754 binary floating point to base ten decimal system (float) =
0.625 976 622 104 644 775 390 625(10)

More operations of this kind:

0 - 0111 1110 - 010 0000 0100 0000 0000 0000 = ?

0 - 0111 1110 - 010 0000 0100 0000 0000 0010 = ?


Convert 32 bit single precision IEEE 754 floating point standard binary numbers to base ten decimal system (float)

32 bit single precision IEEE 754 binary floating point standard representation of numbers requires three building blocks: sign (it takes 1 bit and it's either 0 for positive or 1 for negative numbers), exponent (8 bits), mantissa (23 bits)

Latest 32 bit single precision IEEE 754 floating point binary standard numbers converted to decimal base ten (float)

0 - 0111 1110 - 010 0000 0100 0000 0000 0001 = ? Apr 18 08:35 UTC (GMT)
0 - 1000 0100 - 110 1011 0111 1111 1111 1111 = ? Apr 18 08:35 UTC (GMT)
0 - 0111 1100 - 100 0100 1001 1011 1010 1011 = ? Apr 18 08:35 UTC (GMT)
0 - 1000 0011 - 010 1010 1000 0000 0000 0000 = ? Apr 18 08:35 UTC (GMT)
0 - 1000 0101 - 010 1010 0100 1000 0011 0001 = ? Apr 18 08:35 UTC (GMT)
0 - 0111 0100 - 110 1011 1111 0100 0000 0111 = ? Apr 18 08:34 UTC (GMT)
0 - 1001 1110 - 111 1111 1111 1111 1111 1101 = ? Apr 18 08:34 UTC (GMT)
1 - 1010 1010 - 111 1110 1111 1111 1111 1001 = ? Apr 18 08:34 UTC (GMT)
1 - 1111 1111 - 111 1111 1111 1111 1000 1010 = ? Apr 18 08:33 UTC (GMT)
1 - 1100 0110 - 000 0110 0010 1100 0101 1101 = ? Apr 18 08:32 UTC (GMT)
1 - 1000 0100 - 010 1111 0001 1110 1011 1001 = ? Apr 18 08:32 UTC (GMT)
0 - 0111 1111 - 011 1100 1100 1100 1101 0001 = ? Apr 18 08:32 UTC (GMT)
1 - 0111 1011 - 011 0000 0000 0000 0000 0000 = ? Apr 18 08:32 UTC (GMT)
All base ten decimal numbers converted to 32 bit single precision IEEE 754 binary floating point

How to convert numbers from 32 bit single precision IEEE 754 binary floating point standard to decimal system in base 10

Follow the steps below to convert a number from 32 bit single precision IEEE 754 binary floating point representation to base 10 decimal system:

  • 1. Identify the three elements that make up the binary representation of the number:
    First bit (leftmost) indicates the sign, 1 = negative, 0 = pozitive.
    The next 8 bits contain the exponent.
    The last 23 bits contain the mantissa.
  • 2. Convert the exponent, that is allways a positive integer, from binary (base 2) to decimal (base 10).
  • 3. Adjust the exponent, subtract the excess bits, 2(8 - 1) - 1 = 127, that is due to the 8 bit excess/bias notation.
  • 4. Convert the mantissa, that represents the number's fractional part (the excess beyond the number's integer part, comma delimited), from binary (base 2) to decimal (base 10).
  • 5. Put all the numbers into expression to calculate the single precision floating point decimal value:
    (-1)Sign × (1 + Mantissa) × 2(Exponent adjusted)

Example: convert the number 1 - 1000 0001 - 100 0001 0000 0010 0000 0000 from 32 bit single precision IEEE 754 binary floating point system to base 10 decimal system (float):

  • 1. Identify the elements that make up the binary representation of the number:
    First bit (leftmost) indicates the sign, 1 = negative, 0 = pozitive.
    The next 8 bits contain the exponent: 1000 0001
    The last 23 bits contain the mantissa: 100 0001 0000 0010 0000 0000
  • 2. Convert the exponent, that is allways a positive integer, from binary (base 2) to decimal (base 10):
    1000 0001(2) =
    1 × 27 + 0 × 26 + 0 × 25 + 0 × 24 + 0 × 23 + 0 × 22 + 0 × 21 + 1 × 20 =
    128 + 0 + 0 + 0 + 0 + 0 + 0 + 1 =
    128 + 1 =
    129(10)
  • 3. Adjust the exponent, subtract the excess bits, 2(8 - 1) - 1 = 127, that is due to the 8 bit excess/bias notation:
    Exponent adjusted = 129 - 127 = 2
  • 4. Convert the mantissa, that represents the number's fractional part (the excess beyond the number's integer part, comma delimited), from binary (base 2) to decimal (base 10):
    100 0001 0000 0010 0000 0000(2) =
    1 × 2-1 + 0 × 2-2 + 0 × 2-3 + 0 × 2-4 + 0 × 2-5 + 0 × 2-6 + 1 × 2-7 + 0 × 2-8 + 0 × 2-9 + 0 × 2-10 + 0 × 2-11 + 0 × 2-12 + 0 × 2-13 + 1 × 2-14 + 0 × 2-15 + 0 × 2-16 + 0 × 2-17 + 0 × 2-18 + 0 × 2-19 + 0 × 2-20 + 0 × 2-21 + 0 × 2-22 + 0 × 2-23 =
    0.5 + 0 + 0 + 0 + 0 + 0 + 0.007 812 5 + 0 + 0 + 0 + 0 + 0 + 0 + 0.000 061 035 156 25 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 =
    0.5 + 0.007 812 5 + 0.000 061 035 156 25 =
    0.507 873 535 156 25(10)
  • 5. Put all the numbers into expression to calculate the single precision floating point decimal value:
    (-1)Sign × (1 + Mantissa) × 2(Exponent adjusted) =
    (-1)1 × (1 + 0.507 873 535 156 25) × 22 =
    -1.507 873 535 156 25 × 22 =
    -6.031 494 140 625
  • 1 - 1000 0001 - 100 0001 0000 0010 0000 0000 converted from 32 bit single precision IEEE 754 binary floating point representation to decimal number (float) in decimal system (in base 10) = -6.031 494 140 625(10)