LocalCupGrams
Cups ↔ grams by ingredient density — in your browser, no upload
Runs locally · No upload · No account · Densities cited on-page
Privacy: all math runs in this tab. Nothing is uploaded. Densities are cooking guidance, not lab certification or nutrition advice.
Scaled lines appear here. Quantities multiply by the factor; ingredient names stay as pasted.
Simple line scaler — it multiplies leading numbers (including fractions like 1/2). It does not re-convert units or look up densities. Paste stays in this tab only.
How it works
- Pick an ingredient and a US cup / tbsp / tsp (or ml for water-like liquids).
- We multiply by a published grams-per-cup density from
assets/densities.json(King Arthur– / USDA–style sources listed beside each result). - The result shows the grams (or volume) plus the density and source note used.
- Optional: paste a short recipe and scale by 1.5×, 2×, etc.
Honesty: packing, humidity, and brand sift vs scoop change real weight. Prefer a kitchen scale for baking precision. We cite King Arthur– and USDA–style density references; we do not claim nutrition or medical advice.
Guides
- Cups to grams for flour — why AP flour ≈ 120 g/cup
- Tablespoons to grams for butter — stick math without the mess
- Scale a recipe 1.5× — paste lines, multiply carefully
- Why volume ≠ weight — cups lie; scales don’t
Limits (honest)
- US volume units in MVP (cup / tbsp / tsp). UK/AU cup sizes differ — we label US explicitly.
- Starter density set — common baking pantry items. Exotic flours and “heaping” cups are out of scope.
- Not nutrition — no calories, macros, allergens, or medical claims.
- Not garden/room planners — soil, mulch, paint, and flooring belong elsewhere.
FAQ
Is my recipe uploaded?
No. Conversion and scaling run entirely in your browser. There is no account and no server-side storage of ingredients or pasted recipe text. Open DevTools → Network while you work: you should see no upload of your inputs.
Where do the gram numbers come from?
From a static density table curated for common baking ingredients, aligned with published cup-weight charts in the King Arthur Baking and USDA FoodData Central style. Each result shows the density used and a short source note. Brands, humidity, and packing change real weight — treat results as cooking guidance, not lab metrology.
Why isn’t 1 cup always 240 g?
Volume ≠ weight. A US cup of water is about 237–240 g, but flour is closer to 120 g per cup and granulated sugar closer to 198 g. That is why ingredient-specific densities matter.
Do you give nutrition or medical advice?
No. LocalCupGrams is a kitchen unit converter and simple recipe scaler. It does not calculate calories, macros, allergens, or medical nutrition therapy.
Is this a garden or room materials calculator?
No. This site is only for kitchen cups/tbsp/tsp ↔ grams (and ml for water-like liquids). Soil, mulch, paint, and flooring planners are separate products.
Is it free?
Yes. No account and no watermark in the MVP. This pages.dev experiment does not load AdSense scripts.