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Watch Beat Rate Converter: H to Hz & s/d Calculator
Convert vibrations per hour (VPH) to Hertz, ticks per second, and calculate the daily rate impact of a single lost tick. Works with ETA, Sellita, Miyota, Seiko, Rolex, Omega, and Zenith calibers.
Movement
Vibrations per hour
4.000 Hz Frequency
8 /s Ticks per second
If it loses 1 tick per hour
3 s/d
One missed tick per hour means ~3 seconds lost per day at 28,800 vph. Lower beat rates amplify the impact.
1
Select your movement or enter a custom VPH. 2
Read the Hz frequency, ticks per second, and the impact of a lost tick. Higher beat rates (36,000 vph) give smoother hand sweep and better precision, but also more wear on the escapement.
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Frequently Asked Questions
How do you convert VPH to Hz?
Divide the VPH by 7,200. A watch beating at 28,800 vph runs at 4 Hz (28,800 ÷ 7,200 = 4). The division by 7,200 accounts for the fact that one complete oscillation contains two vibrations, and there are 3,600 seconds in an hour.
What does a higher beat rate mean for accuracy?
Higher beat rates generally allow for greater theoretical precision because the balance wheel is less affected by positional disturbances. However, they also create more friction and wear on the pallet stones and escape wheel, requiring better lubrication and more frequent servicing.
How does a lost tick affect daily accuracy?
One missed tick per hour translates to 24 lost ticks per day. The time lost depends on your beat rate: divide 86,400 by your VPH. At 28,800 vph, that's 3 seconds per day. At 18,000 vph, it's 4.8 seconds per day.
Can a watch recover from a lost tick?
No. Once a tick is missed, the time is permanently lost. The watch doesn't "catch up." This is why escapement health-ean pallet stones, proper lubrication, and correct beat error-d-ctly impacts daily rate.
Bibliographic References
- [1] What Is a Beat Rate?-Crown & Caliber
https://henryarcher.com/en-eu/blogs/blog/beat-rates
- [2] Oscillations, Vibrations and Hertz in Watchmaking
https://monochrome-watches.com/glossary/oscillation/
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