Examples
Examples
Try the starting example
- Settled fill volume per pot (mL)
- 500,1000
- Pot counts by size
- 10,5
- Measured fraction of loose volume lost on settling (%)
- 20
- Loose media volume per bag (L)
- 5
- Settled volume required (L)
- 10
- Loose media required (L)
- 12.5
- Whole bags
- 3
- Loose media surplus after purchase (L)
- 2.5
Try another scenario
- Settled fill volume per pot (mL)
- 1000
- Pot counts by size
- 10
- Measured fraction of loose volume lost on settling (%)
- 0
- Loose media volume per bag (L)
- 6
- Settled volume required (L)
- 10
- Loose media required (L)
- 10
- Whole bags
- 2
- Loose media surplus after purchase (L)
- 2
Calculation method
Calculation method
Settled volume required (L)
Sum settled mL per pot × counts, divided by 1000.
Loose media required (L)
Settled volume / (1 − measured volume-loss percentage/100).
Whole bags
Round up loose litres required / litres per bag.
Loose media surplus after purchase (L)
Purchased bag litres − required loose litres.
Symbols and units
- a
- Settled fill volume per pot (mL)
- b
- Pot counts by size
- c
- Measured fraction of loose volume lost on settling (%)
- d
- Loose media volume per bag (L)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Volumes are measured quantities, not pot trade-size labels. The settling input is loss as a fraction of initial loose volume, so it is divided out rather than simply added. Density, compaction and suitability for a plant are not inferred.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.