AquariumCalcs: Fin & Figures — for the fish aficionado
Meet the Calcs Family →

Dose by Volume Calculator

Scale any product's label dose rate to your specific tank volume.

Your numbers
From your product's label

This calculator doesn't know your product -- you do

Always get the actual dose rate from your product's own label or manufacturer instructions. This tool only scales that rate to your tank size; it never supplies a dose rate on its own.

How this calculator works

This is a scaling tool, not a dosing guide. Enter the dose rate exactly as printed on your specific product's label or manufacturer's dosing chart (for example, "1 mL per 10 gallons"), along with your tank's volume, and it does the multiplication to tell you how much to dose for your specific tank.

Why this calculator won't give you dosing numbers

Aquarium medications, water conditioners, and additives vary enormously in concentration between brands and products -- a dose rate that's correct for one product can be wrong, even harmful, for a differently concentrated one. Rather than risk providing an incorrect dose from a general source, this tool strictly scales the rate you provide from your own product's label to your tank size. Always follow your specific product's instructions, and when in doubt, contact the manufacturer or a veterinarian.

Frequently asked questions

Why doesn't this calculator just tell me how much medication to use?

Different products vary significantly in concentration and formulation, so a dose rate that's safe for one product can be wrong for another -- this tool only scales the rate you get from your own product's label, rather than guessing at a number that could be incorrect for your specific product.

Where do I find my product's dose rate?

Check the product's label, box, or included dosing chart -- most aquarium products state their rate as an amount per gallon or per specific tank size (e.g., "5 mL per 20 gallons").

Can I use this for medications as well as water conditioners?

Yes -- this calculator works for any product where you have a known label dose rate, including medications, though always double-check medication instructions carefully given the added importance of getting fish medication right.

More Water Chemistry & Cycling calculators

Aquarium Heater Size Calculator Water Change Calculator

All AquariumCalcs tools