Calculators

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General Aquarium Calculators

• Tank Volume Calculator
  - Calculate the total volume of water that a rectangluar aquarium can hold.
  
  
• Tank Weight Calculator
  - Calculate both the full and empty weights of a rectangular aquarium.
  
  
• Substrate Calculator
  - Calculate how much substrate is needed for a sand bed of a given height.
  
  
• Effect of Water Changes Calculator
  - Calculate the effect of repeated water changes on the concentration of a given substance.
  
  

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Reverse-Osmosis & Deionization Calculators

• CO2 DI Resin Depletion Calculator
  - Calculate what percentage of a deionization (DI) filter is being depleted by carbon dioxide alone.
  
  
• RO Membrane Performance Calculator
  - Calculate the expected performance in gallons-per-day (GPD) of a reverse-osmosis (RO) filter.
  
  

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Unit Conversion Calculators

• Alkalinity Conversion Calculator
  - Convert alkalinity between milliequivalents-per-liter, carbonate hardness, and parts-per-million.
  
  
• Dosing Pump Conversions
  - Convert between milliliters (ml), liters, or gallons per minute, hour, day, or week.
  
  
• Temperature Conversion Calculator
  - Convert temperature between fahrenheit, celsius/centigrade, and kelvin.
  
  
• Salinity Conversion Calculator
  - Convert salinity between parts-per-thousand, relative specific gravity, and units of conductivity.
  
  
• Salinity Correction Calculator
  - Correct a relative specific gravity measurement taken with a non-temperature-correcting unit.
  
  

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Marine Aquarium Calculators

• CO2 Level Calculator
  - Calculate the carbon dioxide level given a few relevant parameters.
  
  
• Jose Dieck's Reef Chemistry Calculator
  - Calculate the neccessary calcium, alkalinity, or magnesium additions required to reach a target level.
  - Click here for the enhanced flash version.
  
  
• Maximum O2 Level Calculator
  - Calculate the maximum equilibrium oxygen level given a few relevant parameters.
  
  
• Resulting Salinity Calculator
  - Calculate the resulting change in salinity when water is added or evaporated.
  
  
• Target Salinity Calculator
  - Calculate the number of water changes needed in order to reach a target salinity.
  
  

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Freshwater Aquarium Calculators

• CO2 Level Calculator
  - Calculate the carbon dioxide level given a few relevant parameters.