What is 9/64 as a decimal?

9/64 is exactly 0.140625 as a decimal.

How many millimetres is 9/64 of an inch?

9/64 of an inch is 3.571875 mm, computed with the exact definition 1 inch = 25.4 mm.

9/64

Fraction9/64

Decimal0.140625

Percent14.0625%

9 of 64 equal parts filled .

Where the decimal comes from

9/64 equals 140625/1,000,000 equals 0.140625.

Multiply the top and bottom by 15625 and the denominator becomes 1,000,000. A fraction over 1,000,000 is what a decimal is: 0.140625 means 140625 thousandths.

Every way to write it

Decimal: 0.140625
Percent: 14.0625%
Ratio: 9 : 64 (part to whole)
As inches: 9/64″ = 3.571875 mm

Equivalent fractions

Multiply the top and bottom of 9/64 by the same number and the value does not change:

9/64 = 18/128 = 27/192 = 36/256 = 45/320 = 54/384 · more, or pick a denominator

On the number line

As a measurement

Read as inches, 9/64″ is 3.571875 mm exactly. The nearest marks on the finer rules:

Rule	Nearest mark	Decimal inches	mm	Difference
16ths	1/8″	0.125	3.175	−0.3969 mm
32ths	5/32″	0.15625	3.9688	+0.3969 mm
64ths	9/64″	0.140625	3.5719	exact

Need a different rule or a tolerance? Nearest fraction · Within tolerance

Common questions

What is 9/64 as a decimal?: 9/64 is exactly 0.140625 as a decimal.
What is 9/64 as a percentage?: 9/64 is exactly 14.0625%.
How many millimetres is 9/64 of an inch?: 9/64 of an inch is 3.571875 mm, computed with the exact definition 1 inch = 25.4 mm.

Fraction–decimal chartThe everyday set, printable.Rule charts16ths, 32nds, 64ths, 128ths.The rulerSee 9/64 in its place.

Where this comes from. Exact rational arithmetic on the values shown — fractions are pairs of integers until display, and inch–metric conversion uses 25.4 mm to the inch, exact by definition since 1959. See the full methodology.