Aquarium Heater Calculator

Find the right heater wattage to maintain your desired water temperature.

Tank Volume (gallons)

Room Temperature (°F)

Target Water Temperature (°F)

Calculates wattage based on volume and temperature differential.

Recommends two heaters for tanks needing over 300W for safety.

Proper heating prevents stress and disease in tropical fish.

Calculate aquarium volume in gallons and liters for rectangular, bowfront, cylinder, and hexagonal tanks. Free tool.

Calculate how many fish your aquarium can safely hold. Based on tank volume, filtration, and fish size. Free tool.

Calculate CO2 levels in your planted aquarium from pH and KH readings. Optimize plant growth. Free tool.

Calculate fertilizer doses for planted aquariums. Supports EI dosing, PPS-Pro, and custom schedules. Free tool.

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