Old instruments
Volvelle
Direct answer
Volvelle is a diagram with one or more movable paper discs used to calculate or display cycles and correspondences.
Volvelle is a rotating paper calculator used in historical astronomy, timekeeping, or navigation.
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At a glance
- Found in
- Historical Almanacs & Instruments
- Related
- Star Atlas, Planisphere, Calendar Wheel, Canon of Eclipses
Volvelle is a rotating paper calculator used in historical astronomy, timekeeping, or navigation.
An engraved functional orientation; the page explains the real instrument, method, or publication.
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The story behind Volvelle
Volvelles appeared in medieval and early modern manuscripts and printed books for astronomy, calendars, medicine, and computation.
A one-minute story
The Book of the Sky
How people learned to read the sky, from Babylon to the day you were born.
Why Volvelle matters
Volvelle matters because its layered motion turns a static page into an interactive model of calendrical or celestial relationships.
How to read Volvelle
Read Volvelle by identifying every scale, pointer, epoch, and assumption before rotating the parts.
Volvelle in practice: an example
A lunar volvelle can align calendar date and lunar age to estimate phase.
Where readings of Volvelle go wrong
A surviving wheel may be incomplete, decorative, or based on an obsolete model and should not be assumed precise.
Sources and editorial method
Research references used for this entry include:
- Royal Museums Greenwich: Astronomical and Navigational Instruments - Museum reference collection for historical observing, calculating, timekeeping, and navigation instruments.
- Library of Congress: Rare Book and Special Collections - Collection context for historical American almanacs and the printed culture in which they circulated.
- Source
- The Great Almanac Dictionary
- Category
- Historical Almanacs & Instruments
- Last updated
- 2026-09-26
Explore Volvelle
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More in Historical Almanacs & Instruments
- Assumed Position
- Celestial Globe
- Declination Table
- Hadley Quadrant
- Lunar Distance Table
- Plumb Line
- Sextant
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Common questions
What is a volvelle?
Volvelle is a diagram with one or more movable paper discs used to calculate or display cycles and correspondences.
What do people get wrong about a volvelle?
A surviving wheel may be incomplete, decorative, or based on an obsolete model and should not be assumed precise.
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