Aquarith: Aquarium Calculator

KNOW THE REAL WATER VOLUME The advertised capacity of a tank isn't always the amount of water it will actually hold. Use the calculator to estimate the usable water volume while accounting for the space taken by substrate and other elements. PLAN YOUR SUBSTRATE Estimate the amount of substrate needed for your setup based on the dimensions and desired substrate depth. Useful when planning a new aquarium or checking how much gravel, sand, or other substrate to prepare. CHECK THE WEIGHT Water adds up quickly. Aquarith calculates the weight of the water and combines it with the selected tank parameters to give you an estimated total filled weight — useful when considering where to place a larger aquarium. SWITCH UNITS Work in the measurement system you're most comfortable with. Quickly switch between liters and gallons and use Metric or Imperial dimensions. KEEP YOUR CALCULATIONS Save aquarium configurations and return to them later. Duplicate an existing calculation when planning a similar tank and adjust only the dimensions you need. MADE FOR AQUARIUM PLANNING Use Aquarith when: - Choosing a new tank size - Planning a freshwater setup - Preparing a reef aquarium - Estimating substrate requirements - Checking water capacity - Comparing different tank dimensions - Estimating filled weight The calculations are performed directly on your iPhone, so Aquarith doesn't require an internet connection.