Convert between a calendar date and its day-of-year ordinal, ISO week number and week date, in both directions.
Compound gear train from teeth counts: output rpm, overall ratio, torque after a stated efficiency, and the service factor load.
Critical angle from static friction, then the slide or hold verdict, acceleration down the ramp and the work done against friction.
Estimate doubling time and project compound growth, with the exact doubling time beside the estimate so you can see where the rule drifts.
Dial in all eight corner radii, watch the shape change and copy the exact CSS.
Build linear, radial or conic gradient text and copy the CSS or the ready-made HTML span.
Convert text to Grade 1 Unicode Braille and back, with capital and number signs handled properly.
Draw a signature with mouse, pen or finger and download it as a transparent PNG.
