UK Speeding Calculator
A UK speeding-penalty calculator built around a single draggable dial that turns a speed into a clear, likely outcome.
When someone gets caught speeding, they want one answer fast: what's going to happen to me? The existing UK speeding calculators are accurate but dated and clunky — walls of dropdowns and dense legal text. There was an obvious gap for a tool that is instantly understandable and genuinely pleasant to use.
I built the penalty logic as a pure, testable module straight from the Sentencing Council guidelines and NPCC guidance, then wrapped it in one draggable speed dial. As you drag, the arc moves through the real thresholds — green tolerance, amber awareness course, orange fixed penalty, red court — so the outcome is legible at a glance. The whole thing runs in the browser, so nothing the user types ever leaves their device.
- Draggable custom-SVG speed dial with live, colour-coded thresholds
- Outcome engine: course vs fixed penalty vs court, with fines, points and ban warnings
- New Driver Act revocation + 12-point totting-up detection
- Optional income input for an estimated £ fine
- Shareable result links that reopen the exact scenario
- Cited gov sources + FAQ with structured data for SEO
- Private by design — calculates client-side, nothing stored
Like what you see? Let's build something together.