Home & Utility
Water volume and usage calculators for aquariums, swimming pools, and household water bills.
Most popular in Home & Utility
Aquarium Water Change Calculator
Weekly aquarium water-change volume based on tank size and stocking level.
Open calculatorSwimming Pool Volume Calculator
Calculate pool water volume in liters, cubic meters, and US gallons — for dosing chemicals accurately.
Open calculatorHousehold Water Bill Estimator
Estimate monthly water usage and bill for your household — and see where to save.
Open calculatorExplore the full library
Toilet Flush Water Usage
Water used per flush.
OpenHot Tub Water Volume
Fill volume + chemical dose.
OpenGarden Hose Water Usage
Hose flow + monthly cost.
OpenSprinkler Water Usage
Sprinkler system usage.
OpenKoi Pond Water Volume
Pond volume + turnover.
OpenFish Tank Water Change
Aquarium change volume.
OpenWater Heater Capacity Planner
Home hot-water sizing.
OpenWell Pump Daily Volume
Well pump daily target.
OpenRainwater Harvest Estimator
Rainwater collection volume.
OpenDishwasher Cycle Water Usage
Estimate water used by dishwasher cycle — flow rate, duration, and cost breakdown.
OpenLaundry Load Water Usage
Estimate water used by laundry load — flow rate, duration, and cost breakdown.
OpenToilet Flush Water Usage
Estimate water used by toilet flush — flow rate, duration, and cost breakdown.
OpenSimple, accurate, personalized
Pick your calculator
Choose the one that matches your situation from the grid above.
Enter a few details
Weight, activity, climate, species — takes under 30 seconds.
Get your target
A research-backed daily target plus an hourly schedule.
Learn the science behind home & utility
Read our in-depth guides for research-backed context on every calculator here.