# Cups to Grams Calculator

Convert cups to grams for flour, sugar, butter, rice, oats, honey, and more. Accurate gram weights for baking and cooking ingredients.

## What this calculates

Convert cups to grams for your favorite cooking and baking ingredients. Since different ingredients have different densities, one cup of flour weighs much less than one cup of honey. Pick your ingredient and get an accurate weight.

## Inputs

- **Cups** (cups) — min 0 — Enter the number of cups (fractions like 0.25, 0.5 work).
- **Ingredient** — options: All-Purpose Flour (120 g/cup), Granulated Sugar (200 g/cup), Brown Sugar, packed (220 g/cup), Powdered Sugar (120 g/cup), Butter (227 g/cup), White Rice, uncooked (185 g/cup), Rolled Oats (90 g/cup), Honey (340 g/cup), Milk (245 g/cup), Water (237 g/cup), Cocoa Powder (86 g/cup), Cornstarch (128 g/cup), Custom (enter g/cup) — Select an ingredient or choose custom to enter your own value.
- **Custom Grams per Cup** (g/cup) — min 1, max 1000 — Grams per cup for your ingredient. Only used with 'Custom'.

## Outputs

- **Weight (Grams)** (g) — Total weight in grams.
- **Weight (Ounces)** (oz) — Total weight in ounces.
- **Weight (Kilograms)** (kg) — Total weight in kilograms.
- **Tablespoons** (tbsp) — Equivalent volume in tablespoons (16 tbsp = 1 cup).
- **Volume (mL)** (mL) — Equivalent volume in milliliters (1 US cup = 236.588 mL).

## Details

Measuring ingredients by weight (grams) instead of volume (cups) is the secret to consistent baking. A cup of flour can vary by 20-30% depending on whether you scooped it, spooned it, or sifted it. Weight doesn't change.

**Cups to Grams Reference Table:**

| Ingredient | 1 Cup (g) | 1/2 Cup (g) | 1/4 Cup (g) |
|------------|-----------|-------------|-------------|
| All-Purpose Flour | 120 | 60 | 30 |
| Granulated Sugar | 200 | 100 | 50 |
| Brown Sugar (packed) | 220 | 110 | 55 |
| Powdered Sugar | 120 | 60 | 30 |
| Butter | 227 | 113.5 | 56.75 |
| White Rice | 185 | 92.5 | 46.25 |
| Rolled Oats | 90 | 45 | 22.5 |
| Honey | 340 | 170 | 85 |
| Milk | 245 | 122.5 | 61.25 |
| Water | 237 | 118.5 | 59.25 |

**Pro Tip:** When a recipe gives both cups and grams, always use the gram measurement. It's what the recipe developer actually tested with. The cup measurement is often a rounded approximation.

**One US cup** = 236.588 mL = 16 tablespoons = 48 teaspoons. Note that US cups, UK cups (284 mL), and metric cups (250 mL) are all slightly different.

## Frequently Asked Questions

**Q: How many grams in a cup of flour?**

A: One US cup of all-purpose flour weighs approximately 120 grams when measured using the spoon-and-level method. If you scoop directly from the bag, you might pack in 140-150 grams. For bread flour, it's about 130 grams per cup.

**Q: Why does the same cup measure give different gram weights?**

A: Because ingredients have different densities. Honey is thick and heavy (340 g/cup), while oats are fluffy and light (90 g/cup). A cup is a fixed volume (236.6 mL), but how much mass fits in that volume depends entirely on the substance.

**Q: Are US cups and metric cups the same?**

A: No. A US cup is 236.588 mL, while a metric cup (used in Australia and some other countries) is exactly 250 mL. The UK uses a 284 mL imperial cup, though it's rarely used in modern recipes. This calculator uses US cups.

**Q: How do I measure flour correctly with cups?**

A: Use the spoon-and-level method: fluff the flour in its container, spoon it gently into the measuring cup, then level the top with a flat edge. Never scoop directly from the bag or tap the cup, as this compacts the flour and gives you too much.

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Source: https://vastcalc.com/calculators/conversion/cups-to-grams
Category: Conversion
Last updated: 2026-04-08