Estimate usable terrarium capacity from internal dimensions, substrate depth, decor displacement, and fill percentage, with gross and practical volumes.
Usable capacity is a planning volume after obvious space losses. Living space quality also depends on ventilation, furnishing, and species-specific floor area.
This geometric estimate is not a stocking recommendation. Confirm enclosure minimums with current husbandry guidance for the species.
A 90 × 45 × 60 cm enclosure with 10 cm substrate, 12% decor displacement, and a 90% fill factor has about 160.38 usable liters.
Wall thickness and frames do not provide usable space, so internal measurements give a more accurate capacity.
Use a conservative percentage based on how much of the open space the decor occupies.
The calculator removes its average depth from open vertical capacity and reports substrate volume separately.
No. Stocking depends on species, floor area, behavior, ventilation, and welfare guidance, not liters alone.
The usable liter result is divided by 28.3168 to estimate cubic feet.
| Variable | Meaning | Unit |
|---|---|---|
| Length × width × height | Internal enclosure dimensions | cm |
| Substrate depth | Average occupied base layer | cm |
| Displacement | Hardscape share of open volume | % |
| Fill factor | Practical usable share | % |