Recognised as Decimal number

0.00021

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

0.00021 is a decimal number equal to 21⁄100,000. It lies between 0 and 1, and as a percentage it is 0.021%.

Number properties

Absolute value0.00021

SignPositive

Integer part0

Fractional part0.00021

Decimal places5

Floor0

Ceiling1

Rounded to nearest0

Truncated0

Fractions & ratios

As a fraction21/100,000exact

Ratio21 : 100,000

As a percentage0.021%

Reciprocal4,761.9047619048≈

Arithmetic

Double0.00042

Half0.000105

Square4.41 × 10^-8

Cube9.261 × 10^-12

Square root0.0144913767≈

Cube root0.0594392195≈

Negation-0.00021

Natural logarithm-8.4684030272≈

Logarithm base 10-3.6777807053≈

Representations

Decimal0.00021

Scientific notation2.1 × 10^-4

Exponential2.1e-4

IEEE 754 binary64 (hex)0x3F2B866E43AA79BCthe exact 64-bit pattern stored

IEEE 754 binary32 (hex)0x395C337232-bit single precision, may lose accuracy

Stored as0.00021the nearest binary64 value to what you typed

Rounding & precision

Significant figures as written2counted 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 places0.000

To 4 decimal places0.0002

To 1 significant figure0.0002

To 2 significant figures0.00021

To 3 significant figures0.000210

To 4 significant figures0.0002100

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.