About Grandfather Clocks
Grandfather clocks - formally known as longcase clocks - are freestanding, weight-driven pendulum clocks introduced in the 17th century. The pendulum's long arc allows for greater precision, making these clocks some of the most accurate mechanical timekeepers ever made. Their iconic "tick-tock" sound has become synonymous with the passage of time itself.
If you enjoy watching time pass in style, explore our nixie tube clock for a retro electronic aesthetic, or our digital clock for clean modern display. The world clocks page shows time around the globe. For countdown purposes, try the countdown to date tool or our range of online timers.
The name "grandfather clock" was popularised by Henry Clay Work's 1876 song "My Grandfather's Clock." Before that, these were simply called longcase or tallcase clocks. Today they remain a beloved feature of traditional homes, often passed down as family heirlooms. Our alarm clock brings a touch of that classic feel to your morning routine.
History and Mechanical Clock Facts
| Fact | Detail |
|---|---|
| First longcase clock made | c. 1680, by Ahasuerus Fromanteel |
| Typical height | 6–8 feet (1.8–2.4 m) |
| Pendulum period | Exactly 2 seconds per swing |
| Weight mechanism | Descending weights drive the gear train |
| "Grandfather's Clock" song | Published 1876, Henry Clay Work |
| Average price (antique) | $2,000–$20,000+ |