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.

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

Beats Per Day (beat/day)

The resulting beats 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.

• Hertz To Bph

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

• Tourbillon Revolutions Per Day

  Tourbillon cage revolutions per 24-hour day from its rotation period in seconds.

• Bph To Hertz

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