⚙ CALCULATOR

Beat Rate Calculator

Enter a beat rate — or pick one of the common reference frequencies — and get back the beats per second, the theoretical daily tolerance, the seconds-hand step angle and the escapement tooth counts that make it work.

Inputs

Beat rate (vph)

Escape wheel teeth (teeth)

Fourth wheel teeth (teeth)

Display unit

Beat rate

—

vibrations per hour

Frequency—

Beat period—

Seconds step—

Steps / rev—

Beats per day—

Drift, 1 beat/h—

Escape wheel—

Train ratio—

Adjust the inputs to see a result.

What the numbers assume

Higher frequency divides time more finely, so it recovers better from positional disturbance — but it multiplies the number of impulse events per day, so wear rises with it.
A 4 Hz quartz movement steps 8 times per second; a 4 Hz mechanical movement beats 8 times per second. The similarity is numerical, not mechanical.

These are estimates from the values entered, given to make the relationships visible. They are not measurements, and they do not certify a movement. Verify against the actual movement and its service documentation.

⚙ RELATED

Beat Rate Calculator

Inputs

What the numbers assume

Read next

Timegrapher

Balance Wheel

Escapement