All Kitchen Tools

How the nine tools split up

Six of the nine are converters: they take a value in one unit and return it in another, using the same density and unit-conversion library that powers the individual ingredient pages — the Ingredient Converter, Oven Temperature Converter, Pan Size Converter, Butter Converter, and Common Measurement Converter all draw from that shared library rather than each reimplementing their own math, so a fix to a density figure updates every tool that depends on it at once. The Recipe Scaler is a planner rather than a pure converter — it takes a full ingredient list and a scale factor and rounds every quantity to a fraction a home cook would actually measure (½ cup, not 0.4732 cups), which is a harder problem than straight unit conversion because it has to decide when a rounded fraction is close enough. The Substitution Finder, Safe Cooking Temperature Guide, and egg-weight lookup are reference tools — they don't convert a number so much as look one up against a bounded, sourced dataset.

Every tool runs its calculation in the browser using data compiled into the page at build time, not a live API call — so there's no network request to fail, no rate limit, and nothing that goes offline if a backend service does. The tradeoff is that each tool only covers the ingredients or foods that made it into that dataset; see the Methodology page for exactly how each dataset was sourced and where the boundaries are.

The underlying conversion and scaling math ships with its own automated test suite, so a change made to fix one tool's behavior gets checked against the others before it ships, rather than relying on manual spot-checking across nine separate pages.

Each tool page also carries its own worked example and edge-case notes rather than a generic "enter a value" instruction — the Pan Size Converter, for instance, walks through why a wider pan needs a shorter bake time even with the same batter volume (more surface area exposed to heat, same total mass), and the Butter Converter explains the US-stick-versus-EU-block difference that trips up a lot of cross-Atlantic recipe conversions. That page-level detail is why the tools live as full pages rather than a single multi-purpose calculator widget.