CentoSlide ― circular slide rule for calculating small musical intervals

360° = octave

Right-click the image to download the SVG; Click the image (which itself is a link) to interact with the slide rule within the browser.

Octave

360° = whole tone

Right-click the image to download the SVG; Click the image (which itself is a link) to interact with the slide rule within the browser.

Whole tone

Designed by @hsjoihs (GitHub, Twitter)