Hummingbird Nectar Calculator
Sugar water batches at 1 to 4 ratio, with change schedule.
What it does
Hummingbird nectar copies flower chemistry at one part refined white sugar to four parts water: quarter cup sugar with one cup water fills the standard feeder. White sugar matches natural sucrose while honey grows fungus and dye risks harm for zero gain.
The tool above takes sugar cups and returns water with batch total and grams beside it. The default quarter cup needs 1 cup water for 1.25 cups total at 50 g sugar.
Recipe and hygiene follow Audubon with Smithsonian zoo guidance beside them: dissolve fully, cool, hang outside, refrigerate extra up to a week, and change plus scrub every other day. Hot weeks demand twice weekly changes at minimum with weekly in cool weather, and shade slows ferment.
Tap water works and boiling stays optional as long as sugar fully dissolves. Cloudy nectar means mold regardless of schedule: dump, scrub, and refill at once.
How to use
- Type white sugar cups.
- Read water first, total beside it.
- Dissolve fully, cool, then fill.
- Hang feeders in shade near trees.
- Change every other day, scrub each time.
- Refrigerate extra up to one week.
Formula
- 1:4
- Sugar to water parts by volume.
- 200
- Grams per cup of granulated sugar, about.
- 2 days
- Feeder change interval.
Any equal part works: half cup sugar with 2 cups water, 2 cups with 8. Parts must match exactly.
Worked example
Example: quarter cup sugar
Default: 0.25 cups sugar.
- Water: 0.25 x 4 = 1 cup.
- Total: 0.25 x 5 = 1.25 cups.
- Grams: 0.25 x 200 = 50 g.
- Fill feeder, hang in shade.
- Change in 2 days with scrubbing.
- Tool shows 1 cup, 1.25 cups total, 50 g sugar.
Reference table
| Sugar | Water | Total |
|---|---|---|
| 0.25 cups | 1 cup | 1.25 cups |
| 0.5 cups | 2 cups | 2.5 cups |
| 1 cup | 4 cups | 5 cups |
| 2 cups | 8 cups | 10 cups |
| Change rule | Every other day | Scrub each time |
| Storage | Refrigerate extra | 1 week max |
Limits
- White sugar only; substitutes harm.
- Feeders supplement, never replace flowers.
- Heat shortens safe hang time.
- Mold overrides every schedule.
Common mistakes
- Using honey, raw, or brown sugar.
- Adding red dye.
- Eyeballing instead of measuring 1 to 4.
- Leaving cloudy nectar hanging.
- Sun baking the feeder.
Try it yourself
Quick checks. Answers sit tucked under each question.
1 cup sugar?
4 cups water, 5 cups total, 200 g.
2 cups sugar?
8 cups water, 10 cups total, 400 g.
Zero sugar?
Rejected: enter 0.01 to 50 cups.
Questions
Default batch?
Quarter cup sugar with 1 cup water: 1.25 cups.
Honey instead?
Never: honey grows dangerous fungus.
Boil needed?
Optional per Smithsonian; full dissolve is mandatory.
Change cadence?
Every other day with scrubbing; hot weeks at least twice.
Extra storage?
Refrigerated up to one week, dump on mold.
Feeder placement?
Shade near trees, away from windows and crowds.