Compare baseline and proposed water use per ton of compost feedstock. This calculator turns a process-rate change into annual gallons, monthly savings, percentage reduction, and optional utility-cost savings, making the assumptions visible instead of relying on a generic composting water benchmark.
Annual water saved = annual feedstock × (baseline gallons/ton − project gallons/ton). Cost savings = gallons saved × rate.
Positive savings indicate lower direct process-water demand. Rainfall, moisture in incoming material, runoff management, and site cleaning may change actual metered use.
Planning estimate only. Verify site-specific engineering, contracts, regulations, and measurement boundaries before making commitments.
Managing 900 tons/year while reducing use from 55 to 30 gal/ton saves 22,500 gallons and $270 annually at $0.012 per gallon.
Use one consistent facility or program boundary for every input and document whether quantities are measured at collection, receipt, processing, or shipment.
Yes, when all period-based inputs use the same month. The displayed annual wording should then be interpreted as the period you entered.
Use a weighted average for routine reporting or run separate low, typical, and peak cases when density, moisture, composition, or throughput varies materially.
No. The calculation covers the named metric and entered assumptions; permitting, safety, downtime, access, inventory, and local design requirements may need separate review.
Scale accuracy, moisture, inventory timing, contamination, operating hours, and inconsistent system boundaries can all cause actual results to differ.
| Input | Role |
|---|---|
| Primary quantity | Defines the material or resource entering the calculation boundary. |
| Operating assumption | Converts the base quantity into the requested capacity, cost, flow, savings, or rate. |
| Result | Use as a planning estimate and compare it with observed records. |