Convert cups to kg for water, flour, sugar, rice and other ingredients using typical densities, or convert kg to cups, with US or 250 mL metric cups.
Assumptions Density-based
- Conversion is volume-to-mass using density: mass (g) = volume (mL) ร density (g/mL).
- Preset densities are approximate input assumptions and may vary with temperature, brand, processing, humidity and filling method. Powder presets represent bulk density rather than intrinsic material density.
- Powder volume depends on filling and packing; match density to the actual preparation. Brown sugar is explicitly labeled packed.
- Unit standards used: US cup = 236.5882365 mL; Metric cup = 250 mL; 1 kg = 1000 g.
- UK/Imperial cup sizes are not supported.
When to Use This Calculator
- Estimating recipe ingredient masses from volume; weigh ingredients directly when baking accuracy matters.
- Standardizing ingredient lists across US and metric kitchens.
- Estimating shipping weights or nutrition calculations when only volume is known.
Input Definitions
- Cups โ select US (236.5882365 mL) or Metric (250 mL), or enter directly in mL/L.
- Kilograms โ choose kg or g for mass output/input.
- Ingredient & Density โ pick a preset or enter a custom density in g/mL.
- Conversions โ kg = cups ร (mL per cup) ร ฯ รท 1000; cups = kg ร 1000 รท [(mL per cup) ร ฯ].
Cup to kg Formula
The following formulas convert cups to kilograms and back, where ฯ is density in g/mL and CmL/cup is 236.5882365 for a US cup or 250 for a metric cup.
- US cup = 236.5882365 mL
- Metric cup = 250 mL.
- 1 kilogram = 1000 grams.
- Example densities (ฯ): water โ 1.00 g/mL; olive oil โ 0.91 g/mL; all-purpose flour โ 0.53 g/mL; honey โ 1.42 g/mL.
How do you convert cups to kilograms? Multiply cups by the cup size in mL (US 236.5882365 or metric 250), multiply by the ingredient density (g/mL), then divide by 1000 to get kilograms.
How do you convert kilograms to cups? Multiply kilograms by 1000 to get grams, divide by density (g/mL) to get mL, then divide by the chosen cup size (mL per cup) to get cups.
Cups to kg Conversion Table
| Cups (US) | Kilograms (kg) |
|---|---|
| 1/16 | 0.015 |
| โ | 0.030 |
| 1/6 | 0.039 |
| ยผ | 0.059 |
| โ | 0.079 |
| โ | 0.089 |
| ยฝ | 0.118 |
| โ | 0.148 |
| โ | 0.158 |
| ยพ | 0.177 |
| โ | 0.207 |
| 1 | 0.237 |
| 1ยผ | 0.296 |
| 1โ | 0.315 |
| 1ยฝ | 0.355 |
| 1ยพ | 0.414 |
| 2 | 0.473 |
| 2ยฝ | 0.591 |
| 3 | 0.710 |
| 4 | 0.946 |
| * Rounded to 3 decimals. Assumes water (ฯ = 1.00 g/mL). US customary: 1 cup โ 0.236588 kg. | |
Example Problem
Convert 2.5 US cups of water to kilograms.
Use the formula: kg = cups ร CmL/cup ร ฯ รท 1000.
kg = 2.5 ร 236.5882365 ร 1.00 รท 1000 โ 0.591 kg (rounded to 3 decimals)
