| Time | Measurement | Unit | Action |
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The 12-inch ruler is the ubiquitous measurement standard in American schools, carpentry shops, drafting studios, and craft rooms. This digital 12-inch ruler replicates a physical wooden or stainless steel shop ruler with binary fractional divisions down to 1/16th of an inch, calibrated to your monitor's exact pixel pitch.
Imperial rulers use line heights to indicate fractional subdivisions. Each inch is halved repeatedly:
Quick reference conversion between fractional inches, decimal inches, and exact millimeters:
| Fraction | Decimal (in) | Exact Millimeters | Common Application |
|---|---|---|---|
| 1/16" | 0.0625" | 1.5875 mm | Fine wood joinery, sheet metal |
| 1/8" | 0.1250" | 3.1750 mm | Standard screw diameters, drill bits |
| 1/4" | 0.2500" | 6.3500 mm | Quarter-inch drive sockets, seam allowance |
| 3/8" | 0.3750" | 9.5250 mm | Plywood thickness, plumbing fittings |
| 1/2" | 0.5000" | 12.7000 mm | Half-inch pipe, drywall thickness |
| 3/4" | 0.7500" | 19.0500 mm | Cabinet board thickness, garden hose fittings |
| 1" | 1.0000" | 25.4000 mm | Standard unit base, US coin diameter reference |
| 12" (1 Foot) | 12.0000" | 304.8000 mm | Standard school ruler, floor tile standard |