What is 0.33 as a fraction?

0.33 as a fraction is 33/100. The digits go over 100, and 33 and 100 share no common factor, so it is already in lowest terms.

What is 0.33 as a percentage?

0.33 is 33%. Multiplying a decimal by 100 moves the point two places to the right.

How many millimetres is 0.33 of an inch?

0.33 inches is 8.382 mm, using the exact definition 1 inch = 25.4 mm.

0.33 as a fraction

Fraction33/100lowest terms

Decimal0.33

Percent33%

How to get there

0.33 has 2 digits after the point, so it is that many hundredths: write the digits over 100 — 33/100.
33 and 100 share no factor but 1, so 33/100 is already in lowest terms.

33 of 100 squares — 0.33 of the whole, which is also 33%.

As a measurement

Read as inches, 0.33″ is 8.382 mm exactly. The nearest marks on a rule:

Rule	Nearest mark	Inches	mm	Difference
16ths	5/16″	0.3125	7.9375	−0.4445 mm
32ths	11/32″	0.34375	8.7313	+0.3493 mm
64ths	21/64″	0.328125	8.3344	−0.0476 mm

Common questions

What is 0.33 as a fraction?: 0.33 as a fraction is 33/100. The digits go over 100, and 33 and 100 share no common factor, so it is already in lowest terms.
What is 0.33 as a percentage?: 0.33 is 33%. Multiplying a decimal by 100 moves the point two places to the right.
How many millimetres is 0.33 of an inch?: 0.33 inches is 8.382 mm, using the exact definition 1 inch = 25.4 mm.

The same number, other ways

33/100Everything about the fraction: equivalents, the bar model, the number line.33%The same value as a percentage, with its own derivation.Decimal → fraction chartThe whole lookup table, printable.Nearest fractionMatch 0.33″ against any rule, with the exact error.

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.