What is 3/5 as a decimal?

3/5 is exactly 0.6 as a decimal.

How many millimetres is 3/5 of an inch?

3/5 of an inch is 15.24 mm, computed with the exact definition 1 inch = 25.4 mm.

3/5

Fraction3/5

Decimal0.6

Percent60%

3 of 5 equal parts filled — the same share as a bar and as a circle.

Where the decimal comes from

3/5 equals 6/10 equals 0.6.

Multiply the top and bottom by 2 and the denominator becomes 10. A fraction over 10 is what a decimal is: 0.6 means 6 tenths.

60 of 100 squares — 0.6 of the whole. The same squares read as a percentage: 60%, because percent means per hundred.

Every way to write it

Decimal: 0.6
Percent: 60%
Ratio: 3 : 5 (part to whole)
As inches: 3/5″ = 15.24 mm

Equivalent fractions

Multiply the top and bottom of 3/5 by the same number and the value does not change:

3/5 = 6/10 = 9/15 = 12/20 = 15/25 = 18/30 · more, or pick a denominator

On the number line

As a measurement

Read as inches, 3/5″ is 15.24 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	19/32″	0.59375	15.0813	−0.1588 mm
64ths	19/32″	0.59375	15.0813	−0.1588 mm

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

Common questions

What is 3/5 as a decimal?: 3/5 is exactly 0.6 as a decimal.
What is 3/5 as a percentage?: 3/5 is exactly 60%.
How many millimetres is 3/5 of an inch?: 3/5 of an inch is 15.24 mm, computed with the exact definition 1 inch = 25.4 mm.

Fraction–decimal chartThe everyday set, printable.Rule charts16ths, 32nds, 64ths, 128ths.The rulerSee 3/5 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.

3/5