Calculate the average sale or service price needed for an aquarium business line to cover monthly fixed and per-unit costs. Use it for livestock batches, maintenance visits, aquascaping jobs, or another consistent unit. The calculator includes expected loss or nonbillable percentage so the price is spread only across units that are actually sold or billed.
The result is the average price per successfully billed unit that exactly recovers the modeled monthly net cost. Preparing more units also raises variable cost, while losses reduce the units available to carry that cost.
Keep units consistent: do not mix individual fish, service visits, and entire projects in one calculation. Taxes, cash timing, owner compensation, and desired profit belong in the inputs if they are part of the decision.
With $4,500 fixed cost, $28 for each of 300 prepared units, an 8% loss rate, and $1,000 other contribution, 276 units are billable and $11,900 must be recovered. Break-even price is $43.12 per billable unit.
No. Use it to check arithmetic and planning assumptions, then follow the applicable veterinarian, product label, welfare standard, or qualified care guidance.
A zero is accepted only where it represents no cost, no feed, no water change, or another valid absence. Values used as divisors or required physical dimensions must be greater than zero.
Actual results depend on conditions not fully represented by a compact model, including animal needs, measured consumption, losses, operating practices, and local prices.
Keep the unrounded value for planning. For medication or treatment measurements, use only the rounding and measuring method approved on the label or by the responsible professional.
Update them whenever weight, occupancy, tank volume, husbandry routine, prices, equipment use, or the underlying care plan changes.
| Input type | How to choose it |
|---|---|
| Physical measurement | Use an observed or measured value in the displayed unit. |
| Rate or percentage | Use the applicable care plan, product label, or operating record. |
| Planning period | Keep the period consistent with the formula and result. |