What is 17/64 as a decimal?

17/64 is exactly 0.265625 as a decimal.

How many millimetres is 17/64 of an inch?

17/64 of an inch is 6.746875 mm, computed with the exact definition 1 inch = 25.4 mm.

17/64

Fraction17/64

Decimal0.265625

Percent26.5625%

17 of 64 equal parts filled .

Where the decimal comes from

17/64 equals 265625/1,000,000 equals 0.265625.

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: 0.265625 means 265625 thousandths.

Every way to write it

Decimal: 0.265625
Percent: 26.5625%
Ratio: 17 : 64 (part to whole)
As inches: 17/64″ = 6.746875 mm

Equivalent fractions

Multiply the top and bottom of 17/64 by the same number and the value does not change:

17/64 = 34/128 = 51/192 = 68/256 = 85/320 = 102/384 · more, or pick a denominator

On the number line

As a measurement

Read as inches, 17/64″ is 6.746875 mm exactly. The nearest marks on the finer rules:

Rule	Nearest mark	Decimal inches	mm	Difference
16ths	1/4″	0.25	6.35	−0.3969 mm
32ths	9/32″	0.28125	7.1438	+0.3969 mm
64ths	17/64″	0.265625	6.7469	exact

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

Common questions

What is 17/64 as a decimal?: 17/64 is exactly 0.265625 as a decimal.
What is 17/64 as a percentage?: 17/64 is exactly 26.5625%.
How many millimetres is 17/64 of an inch?: 17/64 of an inch is 6.746875 mm, computed with the exact definition 1 inch = 25.4 mm.

Fraction–decimal chartThe everyday set, printable.Rule charts16ths, 32nds, 64ths, 128ths.The rulerSee 17/64 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.