54 calculators
Home & Utility
Water volume and usage calculators for aquariums, swimming pools, and household water bills.
Top picks
Most popular in Home & Utility
#1 pick
Aquarium Water Change Calculator
Weekly aquarium water-change volume based on tank size and stocking level.
Open calculator#2 pick
Swimming Pool Volume Calculator
Calculate pool water volume in liters, cubic meters, and US gallons — for dosing chemicals accurately.
Open calculator#3 pick
Household Water Bill Estimator
Estimate monthly water usage and bill for your household — and see where to save.
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How it works
Simple, accurate, personalized
STEP 1
Pick your calculator
Choose the one that matches your situation from the grid above.
STEP 2
Enter a few details
Weight, activity, climate, species — takes under 30 seconds.
STEP 3
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.