WaterCalculator

Water Usage Calculators

23 tools for understanding how much water your household actually uses — whole-home and per-person totals, fixture-by-fixture breakdowns, outdoor use, water footprints, and the savings you can expect from cutting back.

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

Whole-home & per person

Household Water Usage CalculatorEstimates total daily or monthly household water use. Water Usage Per PersonAverage water use per person, per day. Monthly Water UsageProjects your monthly water use from daily habits. Water Usage ComparisonCompares your usage against regional or national averages. Family Water ConsumptionTotal water consumption for a household of any size.

Water footprint

Water Footprint CalculatorYour direct and indirect (virtual) water footprint. Food Water FootprintWater embedded in the food you eat. Virtual Water CalculatorHidden water used to produce everyday goods.

Fixtures & appliances

Shower Water UsageWater used per shower from flow rate and duration. Bath vs ShowerCompares water use between a bath and a shower. Toilet Water UsageWater used per flush and per day. Faucet Water UsageWater used at the tap from flow rate and run time. Washing Machine Water UsageWater used per laundry load by machine type. Dishwasher Water UsageWater used per dishwasher cycle. Dishwasher vs HandwashingCompares dishwasher and hand-washing water use. Ice Maker Water UsageWater consumed making ice at home. Humidifier Water UsageWater used by a humidifier over time.

Outdoor & vehicle

Garden Hose Water UsageWater used watering the garden with a hose. Pressure Washer Water UsageWater used during pressure-washing jobs. Car Wash Water UsageWater used washing a car at home versus a car wash.

Savings & conservation

Low-Flow Fixture SavingsWater and cost savings from switching to low-flow fixtures. Toilet Flush SavingsSavings from switching to a low-flow toilet. Water Conservation SavingsTotal savings from combined conservation measures.

About our usage calculators

These tools use fixture-consumption figures and household averages sourced from the EPA WaterSense program and USGS water-use surveys, alongside typical appliance and efficient-fixture baselines used across the plumbing trade. 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. CostBills, rates and running costs. TreatmentSoftening, filtration, chemistry. PumpsSizing, head, horsepower, NPSH. DrainageSlopes, drain sizing, stormwater.