What is 13/20 as a decimal?

13/20 is exactly 0.65 as a decimal.

How many millimetres is 13/20 of an inch?

13/20 of an inch is 16.51 mm, computed with the exact definition 1 inch = 25.4 mm.

13/20

Fraction13/20

Decimal0.65

Percent65%

13 of 20 equal parts filled .

Where the decimal comes from

13/20 equals 65/100 equals 0.65.

Multiply the top and bottom by 5 and the denominator becomes 100. A fraction over 100 is what a decimal is: 0.65 means 65 hundredths.

65 of 100 squares — 0.65 of the whole. The same squares read as a percentage: 65%, because percent means per hundred.

Every way to write it

Decimal: 0.65
Percent: 65%
Ratio: 13 : 20 (part to whole)
As inches: 13/20″ = 16.51 mm

Equivalent fractions

Multiply the top and bottom of 13/20 by the same number and the value does not change:

13/20 = 26/40 = 39/60 = 52/80 = 65/100 = 78/120 · more, or pick a denominator

On the number line

As a measurement

Read as inches, 13/20″ is 16.51 mm exactly. The nearest marks on the finer rules:

Rule	Nearest mark	Decimal inches	mm	Difference
16ths	5/8″	0.625	15.875	−0.635 mm
32ths	21/32″	0.65625	16.6688	+0.1588 mm
64ths	21/32″	0.65625	16.6688	+0.1588 mm

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

Common questions

What is 13/20 as a decimal?: 13/20 is exactly 0.65 as a decimal.
What is 13/20 as a percentage?: 13/20 is exactly 65%.
How many millimetres is 13/20 of an inch?: 13/20 of an inch is 16.51 mm, computed with the exact definition 1 inch = 25.4 mm.

0.65 as a fractionThe same number from the decimal's side, with the reduction shown.65% as a fractionThe same number as a percentage, with the work shown.Fraction–decimal chartThe everyday set, printable.Rule charts16ths, 32nds, 64ths, 128ths.The rulerSee 13/20 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.