tape measure — thirds & tenths of an inch

One inch, full width, with 1/16" ticks. Red lines are thirds (1/3, 2/3). Blue lines are tenths (0.1 through 0.9). Type any decimal — even 19.36" — and a pink marker shows where that fractional part lands between the 1/16" ticks.

1/16" = 0.0625". Δ is the distance from the exact fraction to the nearest 1/16" tick.