# Fish Oxygen Demand and Aeration Calculator

> From biomass and oxygen consumption rate, calculate hourly and daily oxygen demand and the number of aerators needed.

- URL: https://demo.fcrsoft.com/en/tools/oxygen-demand-calculator
- Language: en
- Updated: 2026-10-03
- Publisher: FCRSOFT (https://fcrsoft.com)

[Demos](https://demo.fcrsoft.com/?hl=en) / [Free Tools](https://demo.fcrsoft.com/en/tools) / Oxygen Demand and Aeration Calculator Free tool

# Oxygen Demand and Aeration Calculator

Enter the biomass, the fish’s oxygen consumption and your aerator’s capacity.
[See the system that does this automatically Open the live demo](https://demo.fcrsoft.com/login.php?package=farm)

## Calculator

Biomass : 20000 kg
Oxygen consumption : 300 mg/kg/h
Aerator capacity : 1.2 kg O₂/h
Safety factor : 1.5

This calculator runs in your browser; the data you enter is not stored.

## Results

Hourly oxygen demand
6.00
kg/h

Daily oxygen demand
144.0
kg

Aerators needed
8
pcs

**Monitor Water Quality 24/7**Your fish consume about {o2_day} kg of oxygen a day. FCRSOFT watches sensor data 24/7 and raises an alarm the moment oxygen drops.
[Open the live demo](https://demo.fcrsoft.com/login.php?package=farm) [Net-Pen Farming Software](https://demo.fcrsoft.com/en/solutions/net-pen-fish-farming-software)

## How is it calculated?

- Hourly demand (kg/h) = Biomass × Oxygen consumption ÷ 1,000,000

- Aerators = Hourly demand × Safety factor ÷ Aerator capacity

- Oxygen consumption rises with temperature, fish size and after feeding; values are general references.

FCRSOFT

## FCRSOFT does this for you automatically

You don’t need to do the calculations and checks on this page by hand every day. FCRSOFT derives them all automatically from the records entered in the field.

- Oxygen, temperature and pH readings are recorded per cage.

- Sensor data is collected automatically, with instant alerts when thresholds are crossed.

- Water quality history is reviewed side by side with FCR and mortality data.

[Open the live demo](https://demo.fcrsoft.com/login.php?package=farm) [Explore the Farm package](https://demo.fcrsoft.com/demo/farm?hl=en)

[demo.fcrsoft.com](https://demo.fcrsoft.com/login.php?package=farm)

## Related tools and guides

[Guide ### Managing Dissolved Oxygen in Aquaculture What mg/L of dissolved oxygen fish farming needs, why it drops, when to measure it and what to do when it falls. Aeration calculation and monitoring guide. Read the guide](https://demo.fcrsoft.com/en/aquaculture/dissolved-oxygen-in-aquaculture) [Free tool ### Water Quality Checker Choose your species and enter temperature, dissolved oxygen, pH, ammonia, nitrite and salinity to see a good, caution or critical status for each parameter. Open the tool](https://demo.fcrsoft.com/en/tools/water-quality-checker) [Guide ### Managing Ammonia and Nitrite What are total ammonia (TAN), free ammonia (NH₃) and nitrite, which levels are dangerous and how to lower them? How pH and temperature affect ammonia toxicity. Read the guide](https://demo.fcrsoft.com/en/aquaculture/ammonia-and-nitrite-in-fish-farming) [Free tool ### Stocking Density Calculator From cage or pond volume, target density, harvest weight and survival, calculate the biomass you can carry at harvest and the number of juveniles to stock. Open the tool](https://demo.fcrsoft.com/en/tools/stocking-density-calculator)