260 - 19/07/2021, 7:22

Aquarium Calculators — Free Planted Tank Tools

Free aquascaping calculators for glass sizing, lighting, pumps, stocking, CO₂ and Seachem dosing — instant results for your planted tank projects.

12 Free tools
Instant results
Server-side formulas

Tank design & build

Tools for DIY glass builds and layout planning.

01 Calculate the size of the glass for the aquarium with hidden seams. Calculate glass panel sizes for silicone-built tanks from glue and glass thickness. Open tool

09 Tank Water Volume Calculator Liters and gallons from tank dimensions, minus substrate depth if set. Open tool

10 Water Change Volume Calculator Liters to change from a percent of usable water volume. Open tool

11 Substrate Amount Calculator Estimate substrate liters from length × width × depth. Open tool

Equipment & lighting

Pick lights and pumps matched to your tank size.

02 Planted Tank Light Calculator — LED Wattage by Volume Suggested LED wattage by water volume for low, mid and high-tech planted tanks. Open tool

03 Calculate the necessary pump flow rate for an aquarium. Recommended pump flow rates by tank volume for canister, HOB and circulation. Open tool

Fish stocking

Avoid overstocking when adding new fish.

04 Aquarium Stocking Calculator — How Many Fish Fit? Estimate a safe stocking count from water volume and average fish length. Open tool

12 Nitrogen Cycle Tracker Enter ammonia, nitrite, nitrate and cycle age — stage guidance and whether it is safe to add fish. Open tool

CO₂ & fertilization

CO₂, micro and macro dosing for planted tanks.

05 CO₂ Calculator for Planted Tanks — ppm from pH & KH Target CO₂ ppm and bubble rate from pH, dKH and tank volume. Open tool

06 Fertilizer Fe Dose Calculator — Flourish / Flourish Iron Seachem Flourish and Flourish Iron dosing by planted tank volume. Open tool

07 Fertilizer N Dose Calculator — Flourish Nitrogen Flourish Nitrogen dose from current and target N concentration (mg/L). Open tool

08 Fertilizer P Dose Calculator — Flourish Phosphorus Flourish Phosphorus dose from current and target P concentration (mg/L). Open tool