Bird Seed Quantity Calculator

Work out bird seed quantity instantly with clear inputs, formula shown and shareable results.

About Bird Seed Quantity Calculator

Seed use is feeders times daily consumption times days, converted to kilograms and priced at the bag rate, with refills counted at 500 g of capacity per feeder. Winter consumption can double, so planning a month at a time and tracking refills is what stops feeders standing empty in the coldest weeks.

Formula

Seed quantity

kg = feeders x grams per feeder per day x days / 1000

Worked example

With the default values below, Bird Seed Quantity Calculator returns Seed needed of 10.80. Change any input above and every figure here is recalculated in your browser.

Inputs used

Number of feedersminimum 1: 3
Seed per feeder per dayminimum 1 g: 120 g
Period to plan forminimum 1 days: 30 days
Seed price per kgminimum 0.01: 2.8

Results

Seed needed: 10.80 kg
Cost for the period: $30.24
Seed per week: 2.520 kg
Refills at 500 g per feeder: 8

Step by step

1Values used
2Seed quantity
3Seed needed= 10.80 kg
4Cost for the period= 30.24
5Seed per week= 2.520 kg
6Refills at 500 g per feeder= 8

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation or tax into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Bird Seed Quantity figure worked out?

kg = feeders x grams per feeder per day x days / 1000. Seed use is feeders times daily consumption times days, converted to kilograms and priced at the bag rate, with refills counted at 500 g of capacity per feeder.

Why does this matter?

Winter consumption can double, so planning a month at a time and tracking refills is what stops feeders standing empty in the coldest weeks.

What do I need to enter?

Enter number of feeders, seed per feeder per day, period to plan for, seed price per kg. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.