Type any decimal — or a calculation like 12.5/4 — and get the exact simplified fraction, plus the nearest 1/16 and 1/32 with the rounding error, so you always know which mark to cut to.
0.375
375/1000 ÷ 125
3/8
2.4375
2 + 4375/10000
2 7/16
0.333333
closest simple ratio
1/3
fraction = decimal × 10ⁿ / 10ⁿ, then simplify
For repeating or untidy decimals the converter searches for the simplest fraction that matches your value, then also rounds it to the nearest 1/16, 1/32 and 1/64 — the marks that exist on a real tape measure.
Write the decimal over its place value, then simplify. 0.375 = 375/1000, and dividing both by 125 gives 3/8. This page does that automatically and also reduces the result.
0.375 = 3/8 exactly. In sixteenths it is 6/16, and in sixty-fourths 24/64.
Decimals like 0.1 or 2.37 have no tidy fraction on a tape measure. The exact fraction is shown first, and the nearest 1/16, 1/32 and 1/64 are given with the rounding error so you can pick a mark you can actually cut to.
Yes. 0.333333 resolves to 1/3 and 0.166666667 to 1/6, because the converter looks for the simplest fraction that matches the value you typed.