Plurality in Decimals

Sorry, it shall say:

0.5 inches or 0.5 inch
1.5 inches or 1.5 inch

ThanX

The accepted practice (though there are some deviants) is the following:
Any numerals between -1 and 1 inclusive should be singular, otherwise plural.
Units (in short form) should always be in singular.
So:
0.5 inch
1.5 inches
0.8 kg
1.8 kg (not 1.8 kgs)
Chris

So, it is not correct to say:

1.75 kgs

But, 1.75 inches is correct.

Is it the same with other units of measurement?

renan torres-riveroSo, it is not correct to say:

1.75 kgs

But, 1.75 inches is correct.

Is it the same with other units of measurement?

Yes, the rule applies to all units, metric or otherwise. Imagine if this rule is broken, so you may have something li

Hi,
0.5 in = Zero point five inches = One half of a inch.
1.5 in = One point five inches = One and a half inches = One inch and a half
1 in = One inch
0 in = Zero inches

Notice that abbreviations are not used in the plural: kg (kilograms), km (kilometers), in (inches)... and never kgs, kms, etc.

Let me check if whether I got it right or not:

So, I shall use the plural even for amounts below the unit (one) and for zero:

0.7 Zero point seven metres
0.46 Zero point Forty-six inches
But
0.1 Zero point one inch

On the abbrevation issue, I understand that perfectly.

ThanX a lot Kooyeen

Gosh! Wrote "if whether". Hehehehe, my mistake
just "whether".

Yes, always the plural except when you are considering one unit alone. So, one inch, one meter, one volt... all the rest takes the plural unit of measurement: 0.2 meters, 1.1 inches, zero volts, etc. That's the way I read them, and the way I think the vast majority of native speakers read them. The rule that says "everything that is less than 1 is singular and everything that is greater is plural"