WaterCalculator

Water Cost Calculators

13 tools for what your water actually costs — bills, rate tiers, sewer charges, leaks and waste, and the running cost of a shower, bath or sprinkler. Each works from your local rate, with the math shown.

Sarah Bennett, MS Curated and reviewed by Sarah Bennett, MS, Water Quality & Sustainability Specialist.

Bills & rates

Water Bill CalculatorEstimate your water bill from usage and rate. Monthly Water BillProject a monthly bill from daily or weekly usage. Water Bill EstimatorA quick estimate of charges before your bill arrives. Water Rate Tier CalculatorCost across tiered or block water-rate structures. Sewer Bill CalculatorEstimate sewer charges tied to your water use.

Cost per unit & comparisons

Water Cost Per GallonThe cost of a gallon of water at your rate. Water Cost ComparisonCompare water costs across rates or providers.

Leaks & waste

Dripping Faucet CostWhat a dripping faucet adds to your bill. Running Toilet CostThe cost of a running toilet's wasted water. Water Leak CostEstimate the cost of a household water leak.

Showers, baths & outdoor use

Shower Cost CalculatorCost of a shower by length and flow rate. Bath Cost CalculatorCost of filling and heating a bath. Sprinkler Water CostCost of running a sprinkler or irrigation zone.

About our cost calculators

These tools run on standard billing math — usage multiplied by rate, tiered and block rate structures, and typical fixture flow rates — cross-checked against EPA WaterSense benchmarks and common U.S. utility rate structures. Every figure is verified against the live calculator, and each page lists its sources. For the full detail of how we build and check them, see our methodology.

Browse other categories

ScienceDensity, weight, heat and properties. FlowPipe flow, velocity, friction loss. PressureHead, PSI, depth and losses. UsageHousehold use, footprints, savings. TreatmentSoftening, filtration, chemistry. PumpsSizing, head, horsepower, NPSH. DrainageSlopes, drain sizing, stormwater.