Home/Calculators
Bird feeding calculators
Each calculator runs in your browser, shows how it works, and says plainly whether its numbers are published figures or rules of thumb.
Most popular pick
- Bird feeder placement calculator Check a feeder spot against the four placement rules: window collision distance, squirrel jump distance, baffle height and cover distance. Get a verdict and what to move.
- Birdhouse dimensions calculator Pick a species and get the entrance hole diameter, floor size, depth, hole height and mounting height from the published nest box tables, plus a board cut list.
- Bird seed consumption and cost calculator Work out how many pounds of bird seed your feeders go through each month, what it costs, and how many bags to buy, from feeder count, capacity and how fast they empty.
- Hummingbird nectar calculator Mix hummingbird nectar at the correct 1:4 sugar to water ratio for your feeders, and see how often to change it at today's temperature and how much sugar a month takes.
- Smart feeder battery and solar runtime calculator Estimate how many days a smart bird feeder camera runs on one charge, and whether its solar panel keeps up, from battery size, clips per day and sun hours at your feeder.
- Birding binocular calculator: 8x42 or 10x42? Enter magnification, objective size and field of view to get exit pupil, twilight factor, relative brightness and angular field, with a plain verdict for backyard or open-country birding.
Gear the calculators most often point to
Budget ranges are a guide; the button shows the current price on Amazon.
Gift guideShopping for a bird lover? See the Bird Feeder Holiday Gift Guide 2026 for picks by budget, from the big gift to stocking stuffers.
Researched guidance, not professional advice. Prices and availability change often; the buttons show the current listing. Figures come from published tables and manufacturer specifications, not hands-on trials.
