UseCalcPro
Home
Math
Percentages, fractions, ratios
Finance
Loans, mortgages, investments
Health
BMI, calories, fitness metrics
Construction
Materials for building projects
Auto
Car payments, fuel, insurance
Pets
Pet age, feeding, housing
Garden
Lawn care, irrigation, compost
Crafts
Yarn, fabric, candle making
Food & Brewing
Bread, dough, brewing, recipes
Tools
Age, date, GPA, converters
Blog
  1. Home
  2. Pets

Bird Feeder Calculator — Seed & Costs

Feeding Results

Seed Consumption
8.8 lbs/week
37.5 lbs/month
Refill Frequency
Every 3.2 days
Per feeder
Monthly Cost
$56.25
Based on black oil sunflower
Annual Cost
$675.00
Estimated yearly expense

Bags Needed Per Month

5 lb bags
8
10 lb bags
4
20 lb bags
2

Seed Bag Options

5 lb Bags Needed8 bags
10 lb Bags Needed4 bags
20 lb Bags Needed2 bags

Seed Type Reference Guide

Seed TypeAttractsPrice/lbNotes
Black Oil SunflowerCardinals, chickadees, finches, nuthatches, woodpeckers$1.50Most popular, high oil content, attracts widest variety
Mixed SeedSparrows, juncos, doves, jays$1.20Budget-friendly, but may have filler seeds
Nyjer (Thistle)Goldfinches, siskins, redpolls$2.50Small seed, requires special feeder
SafflowerCardinals, chickadees, doves$2.00Squirrels and grackles typically avoid
Suet CakeWoodpeckers, nuthatches, chickadees, wrens$2.00/cakeHigh energy, best for winter feeding
NectarHummingbirds, orioles$1.80Sugar water solution, change every 3-5 days

Bird Feeding Tips

Keep Feeders Clean

Clean feeders every 2 weeks with a 10% bleach solution to prevent disease spread. Rinse thoroughly and dry before refilling.

Use Squirrel Baffles

Install baffles above and below feeders to prevent squirrels from stealing seed. Place feeders at least 10 feet from trees.

Strategic Placement

Position feeders 5-6 feet off the ground near natural cover. Birds need nearby shelter to escape predators quickly.

Provide Water Source

Add a birdbath nearby. Fresh water attracts more birds and is essential year-round, especially in winter when natural sources freeze.

Store Seed Properly

Keep birdseed in airtight containers in a cool, dry place. Moisture leads to mold and attracts rodents. Check for freshness regularly.

Seasonal Adjustments

Increase feeding during migration seasons and winter when natural food is scarce. Birds need extra energy in cold weather.

Example Calculations

1Single Tube Feeder - Moderate Activity

Inputs

Feeders1 tube feeder with 4-cup capacity
Visitors20 bird visitors per day
SeasonSummer
Seed TypeBlack oil sunflower seed ($1.50/lb)

Result

Weekly Consumption8.75 lbs/week ($56.25/month)

Daily: 20 visitors x 1.0 oz x 1.0 summer = 20 oz/feeder, total 20 oz = 1.25 lbs/day. Weekly: 8.75 lbs. Monthly: 37.5 lbs at $1.50/lb = $56.25/month ($675/year). Refill every 1.6 days (32 oz capacity / 20 oz daily). Need 8 bags of 5 lb seed per month.

2Multiple Feeders - High Activity

Inputs

Feeders3 feeders (tube, hopper, suet cage) with average 4-cup capacity
Visitors40 bird visitors per day
SeasonWinter season (30% increase)
Seed TypeMixed seed ($1.20/lb) plus suet

Result

Weekly Consumption22.75 lbs/week ($117.00/month)

Daily per feeder: 13.3 visitors x 1.0 oz x 1.3 winter = 17.3 oz. Total daily: 17.3 x 3 feeders = 52 oz = 3.25 lbs/day. Weekly: 22.75 lbs. Monthly: 97.5 lbs at $1.20/lb = $117/month ($1,404/year). Refill every 1.8 days per feeder. Need 5 bags of 20 lb seed per month.

3Specialty Feeder - Goldfinch Attraction

Inputs

Feeders1 nyjer/thistle feeder with 2-cup capacity
Visitors10 goldfinches per day
SeasonFall
Seed TypeNyjer seed ($2.50/lb)

Result

Weekly Consumption5.0 lbs/week ($53.91/month)

Daily: 10 visitors x 1.0 oz x 1.15 fall = 11.5 oz/feeder = 0.72 lbs/day. Weekly: 5.0 lbs. Monthly: 21.6 lbs at $2.50/lb = $53.91/month ($646.88/year). Refill every 1.4 days (16 oz capacity / 11.5 oz daily). Need 5 bags of 5 lb seed per month.

Frequently Asked Questions

Q

How much bird seed do I need per week?

Seed consumption depends on the number of feeders, daily bird visitors, and season. On average, expect 1-3 lbs per week for a typical backyard setup with 20-40 bird visits per day. Winter feeding requires about 30% more seed due to increased energy needs.

Q

How often should I refill my bird feeder?

Refill frequency depends on feeder capacity and bird activity. A 4-cup tube feeder with moderate activity (20 visitors/day) typically needs refilling every 4-6 days. Check feeders regularly and refill before they empty completely to maintain consistent bird visits.

Q

What is the most cost-effective bird seed?

Mixed seed is the most budget-friendly at around $1.20/lb, but may contain filler seeds birds discard. Black oil sunflower seed at $1.50/lb offers better value as it attracts the widest variety of birds with minimal waste. Buy in bulk (20 lb bags) for additional savings.

Q

Do birds eat more in winter?

Yes, birds consume approximately 30% more food in winter to maintain body heat and energy levels. Natural food sources are also scarcer, making feeders more heavily used. Increase your seed budget and refill frequency during cold months to support overwintering birds.

Q

How many bird feeders should I have?

Start with 2-3 feeders of different types to attract diverse bird species. Tube feeders work for small birds, hopper feeders for medium birds, and platform feeders for ground-feeding species. Space feeders 10-15 feet apart to reduce competition and accommodate more birds.

Q

What attracts the most birds to feeders?

Black oil sunflower seed attracts the widest variety of birds including cardinals, chickadees, finches, and woodpeckers. Combine with nyjer for goldfinches, suet for woodpeckers, and nectar for hummingbirds. Consistent feeding schedules and clean feeders also increase bird activity.

Related Pet Calculators

  • Chicken Coop Calculator

    Calculate coop size and flock requirements

  • Dog Feeding Calculator

    Calculate daily food portions for dogs

  • Pet Food Cost Calculator

    Estimate monthly pet food expenses

  • Fish Stocking Calculator

    Determine pond or aquarium fish capacity

Related Calculators

Chicken Coop Calculator

Calculate coop size and feeding requirements

Fish Stocking Calculator

Determine pond fish capacity and feeding

Compost Calculator

Calculate compost ratios and bin size

Pet Calorie Calculator

Calculate daily calorie needs for pets

More Pet Calculators

See all pet calculators for animal owners

View All

Last Updated: Feb 13, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

UseCalcPro
FinanceHealthMath

© 2026 UseCalcPro