What is 0.40625 as a fraction?

0.40625 as a fraction is 13/32. Write the digits over 100,000 to get 40,625/100,000, then divide top and bottom by 3,125.

What is 0.40625 as a percentage?

0.40625 is 40.625%. Multiplying a decimal by 100 moves the point two places to the right.

How many millimetres is 0.40625 of an inch?

0.40625 inches is 10.31875 mm, using the exact definition 1 inch = 25.4 mm.

0.40625 as a fraction

Fraction13/32lowest terms

Decimal0.40625

Percent40.625%

How to get there

0.40625 has 5 digits after the point, so it is that many ten-to-the-5 parts: write the digits over 100,000 — 40,625/100,000.
40,625 and 100,000 share a greatest common divisor of 3,125. Divide both by it: 13/32.

13 of 32 equal parts filled.

As a measurement

Read as inches, 0.40625″ is 10.31875 mm exactly. The nearest marks on a rule:

Rule	Nearest mark	Inches	mm	Difference
16ths	7/16″	0.4375	11.1125	+0.7938 mm
32ths	13/32″	0.40625	10.3188	exact
64ths	13/32″	0.40625	10.3188	exact

Common questions

What is 0.40625 as a fraction?: 0.40625 as a fraction is 13/32. Write the digits over 100,000 to get 40,625/100,000, then divide top and bottom by 3,125.
What is 0.40625 as a percentage?: 0.40625 is 40.625%. Multiplying a decimal by 100 moves the point two places to the right.
How many millimetres is 0.40625 of an inch?: 0.40625 inches is 10.31875 mm, using the exact definition 1 inch = 25.4 mm.

The same number, other ways

13/32Everything about the fraction: equivalents, the bar model, the number line.40.625%The same value as a percentage, with its own derivation.Decimal → fraction chartThe whole lookup table, printable.Nearest fractionMatch 0.40625″ 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.