Loading the page...
Preparing tools and content for you. This usually takes a second.
Preparing tools and content for you. This usually takes a second.
Fetching calculator categories and tools for this section.
Free bird feeder seed calculator for backyard feeding. Enter pounds on hand, how many feeders you run, and an estimated ounces per feeder per day. See approximate days of supply—or set a number of days and get pounds to shop for.
Last updated: April 8, 2026
Want a custom wildlife or garden calculator for your audience? Get a Quote
Used to estimate total pounds to buy for that window.
Total use (all feeders)
2.00 oz / day
Days of supply (seed on hand)
40
Enter pounds on hand to see duration.
Pounds needed for target days
3.75 lb
Enter “days to cover” above.
Estimates only—spillage, squirrels, weather, and mixed flocks change real use. Adjust oz/day from what you observe when refilling.
Total use
feeders × oz each
Light / medium / heavy presets to get started.
lb → oz
÷ daily oz
Uses 16 oz per lb for shopping-bag math.
Stock up
days × oz/day
Useful before winter or vacation fills.
Yard setup
Count them all
Tube, hopper, and platform feeders differ—tune oz/day from observation.
Tune it
Watch & adjust
Finches vs jays vs grackles will shift your real oz/day.
Health
Rotate seed
Follow extension guidance for cleaning and disease prevention.
5 lb on hand, 2 feeders, 1 oz each per day; 30-day shopping window
Days of supply
40.0
Lb for 30 days
3.75 lb
Bird seed is sold by weight, but daily “burn rate” is easier to think about as ounces across your feeders. We convert pounds to ounces, multiply daily ounces by the number of days you want to cover for shopping lists, and divide total ounces by daily use to estimate how long a bag lasts.
total oz/day = (oz per feeder per day) × (number of feeders)days of supply = (lb on hand × 16) ÷ (total oz/day)lb for target days = (total oz/day × target days) ÷ 16Growing habitat? See plant spacing and garden fertilizer.
Get a Custom Calculator for Your SiteYour yard may use more or less—treat the rate as a dial you tune with observation.
Share it with other backyard bird enthusiasts
Suggested hashtags: #BirdFeeding #BackyardBirds #Wildlife #Garden #Calculator