Compost & Organic Input Converter (Dry Matter / Volume ↔ Weight)
Convert wet/dry and t/ha or m³ with moisture and bulk density.
Values vary widely by material, moisture, and compaction. Field measurement is recommended.
- Works with as few as two inputs (amount only)
- Moisture gives wet ↔ dry conversion
- Bulk density gives volume ↔ weight conversion
- Area gives t/ha and m³/ha
Use this to align assumptions when lab values are dry-basis but application is wet-basis, etc.
Configurare More inputs produce more outputs.
- In compost analysis, moisture is often treated as % water of wet material
- Moisture 60% means dry matter 40%
Enter area to show t/ha and m³/ha
Formula transparency
- Dry matter = Wet weight × (1 − moisture)
- Wet weight = Volume × bulk density
- Per area = Amount ÷ area
- Enter amount (weight or volume)
- Add moisture, bulk density, and area if needed
- Check wet, dry, and volume cards
Enter volume, then add bulk density and moisture to get weight and dry matter together.
Choose dry-basis input, then add moisture and bulk density to get the wet amount and volume needed.
- Bulk density 600 kg/m³, moisture 50%
- Wet weight: 20 × 600 = 12,000 kg = 12 t
- Dry matter: 12 × 0.5 = 6 tDM
- If area is 0.5 ha: 24 t/ha (wet), 12 tDM/ha, 40 m³/ha
Inputs are optional. Examples are clickable. Do not treat as definitive; verify on site.
Input is optional. Because volume ↔ weight conversion needs bulk density, that portion of the results is shown as not calculated when missing. As a rough guide, screened compost at 50% moisture is about 1000 lb/yd³ (≈593 kg/m³), but field conditions vary widely.
Choose “Input by volume” to enter m³. Add bulk density for weight, and moisture for dry matter (tDM).
Main units (t/kg, m³/L, yd³, ton) can be switched in the dropdown. We treat t as a metric tonne (1000 kg).
Moisture and bulk density vary widely by feedstock, particle size, compaction, and storage.
This tool provides estimates. If possible, measure moisture and bulk density on site (bucket + scale).