Converter Inputs
Example Data Table
Examples assume level cups and standard US cup (236.6 mL).
| Material | 1 cup (g) | 2 cups (g) | 3.5 cups (g) |
|---|---|---|---|
| Potting soil (dry, loose) | 85.2 | 170.3 | 298.1 |
| Compost (screened) | 118.3 | 236.6 | 414.0 |
| Sand (dry) | 366.7 | 733.4 | 1,283.5 |
| Granular fertilizer | 248.4 | 496.8 | 869.5 |
| Water (reference) | 236.6 | 473.2 | 828.1 |
Formula Used
This converter uses material density and cup volume to estimate mass:
- grams = cups × cup_mL × density(g/mL) × packing_factor × moisture_factor × temperature_factor
- kilograms = grams ÷ 1000
- ounces = grams ÷ 28.349523125
Because garden ingredients vary, the Custom density option gives the best real-world accuracy.
How to Use This Calculator
- Enter the number of cups you plan to measure.
- Select your cup size so volume matches your measuring cup.
- Choose the material closest to your ingredient.
- Pick packing style (level is the default for recipes).
- Optionally adjust moisture for damp compost or castings.
- Click Convert to see grams above the form.
- Use the CSV or PDF buttons to export your latest result.