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Growing Tips · Volume Guide
How Much Coco Coir Do I Need?
Use container volume—not guesswork—to estimate blocks, bales or pre-filled grow bags for your next crop.
The easiest way to estimate coco coir is to calculate the total litres your containers or beds hold, subtract the volume supplied by other blend ingredients, then add a small handling allowance. Avee’s 5kg coco coir block expands to approximately 70–75 litres.
The basic formula
Containers × litres per container = total litres
Then divide the coir portion by 70–75 litres per 5kg block. Round up to a whole block and add 5–10% when consistent fill depth is important.
Quick Container Examples
| Project | Total volume | Approx. 5kg blocks |
|---|---|---|
| 10 × 5L containers | 50L | 1 block |
| 20 × 10L containers | 200L | 3 blocks |
| 40 × 15L containers | 600L | 9 blocks |
| 100 × 20L containers | 2,000L | 28–29 blocks |
Raised Beds and Troughs
For a rectangular bed, multiply length × width × filled depth using metres, then multiply cubic metres by 1,000 to get litres. Example: a 2m × 1m bed filled 0.3m deep holds 600 litres. If coir is 50% of the blend, you need 300 litres of coir—about four to five 5kg blocks.
Avoid These Ordering Mistakes
- Using compressed dimensions: order by expanded litres, not brick size.
- Ignoring other ingredients: perlite, bark and compost reduce the coir volume required.
- Forgetting settling: allow 5–10% for filling and handling.
- Mixing US gallons and litres: one US gallon is about 3.785 litres.
- Scaling blocks forever: large projects may be more efficient with bulk bales.
Which Avee Format Fits?
Frequently asked questions
Coco Coir Volume FAQs
How much does one 5kg coir block make?
One Avee 5kg block expands to approximately 70–75 litres after hydration.
How many blocks do I need for 1,000 litres?
About 14–15 blocks, before adjusting for other blend ingredients and the handling allowance.
Should I calculate by weight or volume?
Use expanded volume for filling containers and beds. Compressed weight is useful for ordering and freight, not final fill volume.