A span is a unique unit of length that measures 9 inches. This antiquated measurement derives its name from the distance between the tip of the thumb and the tip of the index finger when the hand is fully extended. Although somewhat obscure, the span still finds relevance in certain trades and professions, such as carpentry and masonry.
Conversion Table
Table of Contents
- 1 Span = 9 inches
- 1 Inch = 2.54 centimeters
FAQs (Frequently Asked Questions)
Why is the span still used in some trades and professions?
The span is a practical measurement for tasks that require quick approximations. Its use has persisted in certain fields where precision down to the inch is not always necessary.
How does one measure a span accurately?
To measure a span, extend your hand wide with your thumb and index finger fully apart. The span is the distance between the tips of these two fingers. However, for more precise measurements, it’s recommended to use standardized measuring tools.
In which trades or professions is the span commonly employed?
Carpenters often use the span to gauge the width of wooden pieces. Similarly, masons might use it to estimate the thickness of brick walls.
Can the span be converted to other units of measurement?
Yes, the span can be converted to inches (1 span = 9 inches) and, subsequently, to centimeters (1 inch = 2.54 centimeters) for more conventional measurement systems.
Is the span an internationally recognized unit of measurement?
No, the span is not an official international standard. It’s more of a traditional and informal unit primarily used in specific contexts.
Conclusion
In summary, a span is a unit of length equivalent to 9 inches, traditionally measured as the distance between the tip of the thumb and the tip of the index finger when the hand is spread wide. While not widely used in modern settings, it remains a practical tool in specific trades and activities where rough measurements are sufficient.