If your clock is ticking away but its a little slow or fast, use this calculator to determine how much to shortern or lengthen the pendulum. You don't have to be too precise on the current length; if you have a fairly close figure, then the needed change will be close too.
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The center of gravity includes the mass of the pendulum bob and the pendulum shaft. However, with this calculation of determining the needed change in pendulum length it is really only important to measure the estimated center of gravity in exactly the same way each time.
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BPM = |
(141120 ÷ LP)½
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where,
- BPM is beats per minute
- LP is the pendulum length
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