Use this horology calculation to interpret a stated watch, clock, timing-machine, water-resistance, alarm, or historical respiratory-timing quantity under its defined convention.

Disc Positions

Required integer input.

Day-disc angular advance in degrees per daily step for a specified number of disc positions. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Degrees Per Day (deg/day)

The resulting degrees per day returned as a number.

• Mechanical-watch amplitude and beat measurements depend on lift angle, position, state of wind, movement condition, instrument setup, and elapsed sampling. ATM markings are test-pressure classifications rather than literal safe diving depths.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm movement specifications and measure in multiple positions and power states; follow the manufacturer's water-resistance guidance and obtain pressure testing after case service.

• Week Disc Advance

  Week-disc angular advance in degrees per weekly step for a specified number of positions.

• Daily Rate To Monthly Drift

  Signed clock drift over a specified number of calendar days from seconds gained or lost per day.

• Jumping Hour Advance Rate

  Average jumping-hour advances per day for a specified hours-per-jump interval.