Recognised as Decimal number

0.00129

Positive
Decimal
5 d.p.
Exact fraction
3 s.f.

0.00129 is a decimal number equal to 129⁄100,000. It lies between 0 and 1, and as a percentage it is 0.129%.

Number properties

Absolute value0.00129

SignPositive

Integer part0

Fractional part0.00129

Decimal places5

Floor0

Ceiling1

Rounded to nearest0

Truncated0

Fractions & ratios

As a fraction129/100,000exact

Ratio129 : 100,000

As a percentage0.129%

Reciprocal775.1937984496≈

Arithmetic

Double0.00258

Half0.000645

Square0.000002

Cube2.146689 × 10^-9

Square root0.03591657≈

Cube root0.1088587233≈

Negation-0.00129

Natural logarithm-6.6531130606≈

Logarithm base 10-2.8894102897≈

Representations

Decimal0.00129

Scientific notation1.29 × 10^-3

Exponential1.29e-3

IEEE 754 binary64 (hex)0x3F5522A6F3F52FC2the exact 64-bit pattern stored

IEEE 754 binary32 (hex)0x3AA9153832-bit single precision, may lose accuracy

Stored as0.00129the nearest binary64 value to what you typed

Rounding & precision

Significant figures as written3counted from the digits as typed, not from the value

To 0 decimal places0

To 1 decimal place0.0

To 2 decimal places0.00

To 3 decimal places0.001

To 4 decimal places0.0013

To 1 significant figure0.001

To 2 significant figures0.0013

To 3 significant figures0.00129

To 4 significant figures0.001290

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