How do I calculate daily feed usage?

Daily feed = (Number of Fish x Average Weight in grams x Feed Rate %) / 100,000 to convert to kg. For example, 100 fish at 200g each with 2.5% body weight feeding rate = 0.5 kg/day.

What feed rate should I use?

Feed rates vary by species and temperature. Tilapia typically eat 2–3% of body weight per day; salmon 1–2%. Adjust based on water temperature, fish size, and observed appetite.

When should I reorder feed?

As a rule of thumb, reorder when you have less than 7 days of feed remaining. Factor in supplier lead times — if delivery takes 5 days, start the reorder process at 12+ days remaining.

Does feed rate change as fish grow?

Yes. As fish grow, the percentage of body weight fed decreases, but the absolute amount of feed increases because the fish are heavier. Recalculate feed usage monthly or after sampling.

ToolsConductScience tool

AquacultureFree in-browser calculator

Feed Inventory Planner.

Calculate how many days your feed will last and get reorder alerts. Never run out of feed again.

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Validated2026-04-08

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Feed Parameters

Feed on Hand (kg)

Number of Fish

Avg Weight (g)

Feed Rate (% BW)

Results

100days remaining

Days Left

100

until feed runs out

Daily Usage

0.50 kg

per day

Feed On Hand

50 kg

total inventory

When to use

Weekly inventory checks to plan feed orders
When scaling up production and adjusting feed budgets
After fish sampling to recalculate daily usage with updated weights
Before holidays or periods when suppliers may be closed

Do not use for

As a replacement for on-site inventory tracking — verify actual stock periodically
For precise nutrition planning — consult a fish nutritionist for feed formulation

Feed rate changes with temperature

Fish eat less in cold water. Adjust the feed rate percentage seasonally to avoid overestimating usage.

Account for waste

Not all feed dispensed is consumed. Factor in 5–10% waste when planning, especially in pond systems.

Multiple species or ponds

Run the calculator separately for each species or pond with different stocking densities.

Method

Daily feed consumption calculated as: (Fish Count x Avg Weight x Feed Rate%) / 100,000 kg. Days remaining = Feed on Hand / Daily Usage. Reorder warning triggers at 7 days or less.

Validated

Last validated 2026-04-08. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

ConductScience Feed Inventory Planner (v1.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/feed-inventory-planner

Tacon AGJ. Standard Methods for the Nutrition and Feeding of Farmed Fish and Shrimp. Argent Laboratories Press. 1990.

Feed Inventory Management in Aquaculture

Running out of feed is one of the most preventable causes of production loss in aquaculture. Consistent feeding is critical for maintaining growth rates and FCR. Feed inventory planning requires knowing your current stock, daily consumption rate, and supplier lead times. This tool calculates how many days your current supply will last and warns you when inventory is critically low.

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