Hummingbird Nectar Solution Calculator
Calculate sugar and water for any hummingbird feeder size at the correct 4:1 ratio.
No red dye, no honey — just plain white sugar and water.
The standard hummingbird nectar recipe is one part plain white sugar to four parts water by volume.
That is it.
No red dye, no honey, no organic raw sugar, no brown sugar, no powdered sugar, no agave or any other substitute.
water_cups = total_oz / 8 × 4 / 5 sugar_cups = total_oz / 8 × 1 / 5
For a 32 oz feeder: 4 cups total volume, so 3.2 cups of water and 0.8 cups of sugar.
Bring the water to a boil, dissolve the sugar completely, let it cool to room temperature, then fill the feeder.
Boiling is just to dissolve the sugar and slow microbial growth in the unrefrigerated batch — it is not strictly required if the sugar dissolves in cold water (it will, with stirring, but takes longer).
Why 4:1.
That ratio approximates the sucrose concentration of natural flower nectar from species hummingbirds prefer (about 21% sugar by mass).
Stronger solutions (3:1 sugar to water) can be useful in very cold weather as a quick energy boost, but year-round use of strong nectar can stress hummingbird kidneys, which evolved for the dilute natural ratio.
Weaker solutions (5:1 or 6:1) underdeliver on calories and the birds simply abandon the feeder for higher-yield flowers.
Why no red dye.
The dye is unnecessary — the red plastic of the feeder itself attracts hummingbirds.
Red food coloring may be carcinogenic to hummingbirds at the concentrations they consume relative to body weight, though this is a precautionary stance rather than a proven harm.
Either way, there is no upside.
Plain clear nectar is the right answer.
Why no honey or raw sugar.
Honey ferments rapidly and grows fungus that can cause fatal tongue infections in hummingbirds.
Raw and brown sugars contain iron and molasses, which hummingbirds cannot process well — long-term use causes liver damage.
Powdered sugar contains cornstarch, which ferments and clogs the feeder.
Plain white granulated sugar is pure sucrose, exactly what flowers produce, and is the only safe choice.
Feeder maintenance.
Empty and clean the feeder every 3-4 days in mild weather, every 2 days when above 80°F.
Mold grows in nectar within days at warm temperatures and can sicken birds.
Wash with hot water and a bottle brush; use a 10% white vinegar solution if mold appears, never bleach.
Store unused nectar in the fridge for up to a week.