🧮 Aquarium Calculators
Free tools to help you plan, build, and maintain your reef or freshwater aquarium. Each calculator includes detailed explanations and expert tips.
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Aquarium Tank Volume Calculator
Calculate exact water volume from your tank dimensions. Supports multiple tank shapes.
Reef & Freshwater
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Aquarium Heater Wattage Calculator
Find the right heater size based on your tank volume and temperature requirements.
Reef & Freshwater
🧂
Reef Salt Mix Calculator
Calculate the exact amount of salt mix needed for water changes or a new tank setup.
Reef / Saltwater
⚗️
Alkalinity Dosing Calculator
Calculate how much alkalinity supplement to dose to reach your target dKH.
Reef Only
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Calcium Dosing Calculator
Calculate the right calcium supplement dose to maintain optimal levels for coral growth.
Reef Only
💧
Return Pump Size Calculator
Find the right return pump GPH for your sump setup based on head height and plumbing.
Reef & Freshwater
⚡
Aquarium Electricity Cost Calculator
Estimate how much your aquarium costs to run per month and year.
Reef & Freshwater
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Water Change Calculator
Plan your water change schedule and calculate exact volumes needed.
Reef & Freshwater
🌿
CO2 Dosing Calculator for Planted Tanks
Calculate the ideal CO2 injection rate for your planted freshwater aquarium.
Freshwater
🌊
Aquarium Filter Flow Rate Calculator
Find the right filter GPH for your freshwater tank based on stocking and tank size.
Freshwater