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0.1 as a fraction

0.1 = 1/10.

Said aloud, this is the same phrase as a different number. Here the repeating block is 1 in one reading and 0.1 in the other, so the answers differ: 0.1 is 1/10, while 0.(1) is 1/9. Which one you meant depends on where the bar sits over the digits.

Checked by test against every decimal in this family · How we check

How it gets there

  1. Put the digits over their place value. 0.1 has 1 decimal place, so it is 1/10.
  2. Nothing divides both. 1 and 10 share no factor greater than one, so 1/10 is already in lowest terms — which is why this one looks like it has not been simplified.

Questions people actually ask

What is half of 0.1?
1/20, or 0.05 as a decimal. Halving a fraction doubles the denominator rather than halving the top, unless the numerator is even and cancels. Doubled instead, 1/10 is 1/5 or 0.2.
What is 0.1 as a fraction?
1/10, in lowest terms. 1/10 is the same value before reducing, and dividing both by 1 gets there.
How do you convert 0.1 to a fraction step by step?
Put the digits over their place value — 0.1 has 1 decimal place, so it is 1/10 — then divide both by their greatest common divisor, 1. That gives 1/10 and it cannot reduce further.
Is 1/10 in simplest form?
Yes. The numerator and denominator share no factor above 1, which is what simplest form means. 1/10 is the same number written before that reduction.
What is 0.1 on a tape measure?
It falls between marks. The nearest sixteenth is 1/8, which is off by about 0.63 mm on an inch — close enough for carpentry and not for machining.
What is 1/10 as a decimal?
0.1. This page runs the conversion in the direction people ask for it, and dividing 1 by 10 runs it back the other way.

The same number, other ways

Fraction, lowest terms
1/10
Before reducing
1/10
As a percentage
10%
As a ratio
1:10
Equivalent fractions
2/20, 3/30, 4/40, 5/50
Nearest sixteenth on a tape
1/8 (nearest)

A tape measure only has sixteenths, so 0.1 does not land on a mark. The nearest one is 1/8, which is 0.400 of a sixteenth away — about 0.63 mm on an inch.

Work it out for any decimal

The two calculators this page is built from take any numbers you like: reduce a fraction shows the divisor it used, and fraction to decimal goes the other way, to the nearest 16th, 32nd and 64th.

Decimals either side

0.05 = 1/200.06 = 3/500.07 = 7/1000.08 = 2/250.09 = 9/1000.10 = 1/10

Cite this page

APA
Rule Calculator. (2026). 0.1 as a fraction. Rule Calculator. https://rulecalculators.com/fraction/0-1-as-a-fraction
MLA
"0.1 as a fraction." Rule Calculator, October 1, 2026, https://rulecalculators.com/fraction/0-1-as-a-fraction.
Chicago
Rule Calculator. "0.1 as a fraction." Rule Calculator. Last reviewed October 1, 2026. https://rulecalculators.com/fraction/0-1-as-a-fraction.

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