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Aquarium & Aquascaping Calculators

Stop guessing. Build your perfect fish tank, aquascape, or DIY project with our free, precise, and professional tools.

Calculate Tank Volume View All Tools

Our Tools

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Volume & Weight Calculator

Find out the exact capacity of your tank in gallons/liters and estimate its filled weight to choose a safe stand.
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Substrate Calculator

Calculate exactly how many bags of aqua soil, sand, or gravel you need for the perfect aquascape depth.
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Heater Wattage Calculator

Determine the exact heater wattage needed based on your water volume and room temperature.
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Glass Thickness Calculator

Planning a DIY build? Calculate the minimum safe glass thickness to prevent leaks and blowouts.
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Flow Rate Calculator

Calculate the exact turnover rate required to keep your water crystal clear based on your bioload.
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Planted Tank Lighting

Calculate the optimal amount of light needed for your specific plants and setup.

Why Use TankCalcs?

Setting up a new aquarium involves a lot of math. Whether you're setting up a high-tech planted tank, a massive cichlid display, or building a custom rimless glass tank from scratch, accuracy is key. Our aquarium calculators are built for hobbyists and professionals alike to provide instant, precise measurements without tracking tracking scripts or bloatware.

Frequently Asked Questions

Our calculators use industry-standard physics and aquascaping formulas. However, real-world variables like substrate density variations or glass manufacturer tolerances can slightly affect results. Always use our "Safety Factor" recommendations for DIY builds.

Knowing your exact tank volume is critical for accurately dosing medications, calculating filter flow rates, and selecting the right size heater. Guessing can lead to overdosing chemicals or under-filtering your water.

Yes! All our tools, including the glass thickness, substrate, and lighting calculators, are 100% free. We built TankCalcs to help the fishkeeping community succeed.