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

Beats Per Hour (bph)

Required number input.

Balance oscillation cycles per second from beats per hour, with two beats per full oscillation. 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]

Hertz (Hz)

The resulting hertz 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.

• Hertz To Bph

  Watch beats per hour from full balance oscillations per second, with two beats per cycle.

• Amplitude Decline Power Reserve

  Observed linear balance-amplitude decline in degrees per hour over a running interval.

• Beats Per Day

  Total watch beats in a 24-hour day from beats per hour.