Bee Sugar Syrup Calculator
Mix 1:1 spring or 2:1 fall sugar syrup by weight or volume: pounds of sugar, gallons of water, finished syrup, syrup per hive, and what the batch costs.
Free · no account · works on mobile · embeddable
Best for beekeepers feeding colonies in spring, during a dearth, or for winter stores. Updated .
The syrup
Recipe
Sugar lb = water lb × (sugar parts ÷ water parts); water gal = water lb ÷ 8.34. Syrup volume adds about 0.0755 gal per lb of dissolved sugar, an approximation. Feeding does not replace a mite check or a proper winter weight assessment.
About the bee sugar syrup calculator
Every beekeeper knows the ratios, and every fall someone stands over a stock pot wondering how many bags of sugar it takes to fill four feeders. This calculator turns a ratio and a batch size into an exact recipe: pounds of sugar, pounds and gallons of water, the weight and approximate volume of finished syrup, how much each hive gets, and the sugar cost. Start from the sugar you have, the syrup you want, or the water your pot holds.
It is for anyone feeding honey bees, from a first-year colony drawing comb to a yard being brought up to winter weight.
What 1:1 and 2:1 mean
Extension bulletins define the ratios by weight. Michigan State University's feeding bulletin describes thin spring syrup as 50% sugar, one pound of sugar to one pound of water, which mimics a nectar flow and stimulates the queen to lay. Fall syrup should be at least 66%, two parts sugar to one part water, because bees have less time and warmth to evaporate water down to honey's roughly 18% moisture. Mississippi State Extension gives the same recipes per gallon of water: about 8 lb of sugar for 1:1 and 16 to 17 lb for heavy autumn syrup.
A gallon of water weighs about 8.34 lb, so 2:1 by weight is 16.7 lb of sugar per gallon of water. Measuring by cups instead gives a thinner syrup, because a cup of sugar weighs less than a cup of water; the calculator's volume setting accounts for that.
Weight is exact, volume is approximate
Sugar dissolves into water without adding its full dry volume, so finished syrup is less than sugar plus water by the cup and denser than water. The calculator estimates finished volume from a standard sucrose solution figure (about 0.0755 gal added per lb of dissolved sugar), which puts 1:1 syrup near 10.2 lb per gallon and 2:1 near 11.1 lb per gallon. University of Arizona Extension's note that a gallon of 2:1 syrup adds about 7 lb to a colony's stores lines up with that. Use the weight figures to buy sugar and the volume figures to pick a pot and count feeder fills.
How much a hive needs
Michigan State estimates a 50,000-bee colony takes about 2 lb of thin syrup a day during stimulative feeding. For fall, the target is a hive weight, not a syrup quantity: Mississippi State puts ideal late-autumn stores at 60 to 65 lb of honey or syrup above the cluster. Divide the shortfall by the sugar share of the syrup to see how much syrup a light hive still needs, then run this calculator for the batch.
Worked example: a 25 lb bag into 2:1 fall syrup
A 25 lb bag of sugar mixed 2:1 by weight needs 12.5 lb of water, which is 1.50 gallons (16.7 lb of sugar per gallon of water). Sugar is 67% of the finished syrup by weight. The batch weighs 37.5 lb and fills about 3.39 gallons, roughly 11.1 lb per gallon. Split across 4 hives, each gets about 9.4 lb of syrup, about 0.85 gallons, carrying 6.3 lb of sugar. At $0.70 per lb the sugar costs $17.50, or $5.17 per gallon of syrup.
Sources
- Michigan State University Extension, Feeding honey bees (Extension Bulletin E-3369). Thin spring syrup is 50%, 1 lb of sugar to 1 lb of water; fall syrup at least 66%, 2 parts sugar to 1 part water; a 50,000-bee colony needs about 2 lb of 50% syrup per day. Accessed Sep 4, 2026.
- Mississippi State University Extension, Colony growth and seasonal management of honey bees. Heavy autumn syrup at 16 to 17 lb of sugar per gallon of water, medium syrup at 8 lb per gallon, thin at 4 lb per gallon, and 60 to 65 lb of stores above the cluster in late autumn. Accessed Sep 4, 2026.
This calculator gives planning estimates from the numbers you enter. It is not accounting, tax, veterinary, or legal advice. Replace the defaults with your own farm records whenever you have them.
Frequently asked questions
How much sugar do I need per gallon of water for 2:1 syrup?
About 16.7 lb of sugar per gallon of water, since a gallon weighs 8.34 lb. Mississippi State Extension lists 16 to 17 lb. For 1:1, use about 8.3 lb per gallon. Hot water helps that much sugar dissolve; do not boil the syrup once sugar is in.
Is the 1:1 ratio by weight or by volume?
Extension bulletins define it by weight: one pound of sugar to one pound of water. Measuring cup for cup gives roughly 0.85 lb of sugar per pound of water, a slightly thinner syrup, which is fine for spring feeding but short of the 2:1 target in fall.
How much does a gallon of 2:1 syrup weigh and how much does it add to the hive?
Roughly 11 lb per gallon, of which about two thirds is sugar. University of Arizona Extension says a gallon of 2:1 syrup adds about 7 lb to a colony's food reserves once the bees have cured it.
When should I feed 1:1 versus 2:1?
1:1 in spring and early summer to stimulate brood rearing and comb building or to carry a package until forage starts. 2:1 in late summer and fall to build winter stores, because bees need to evaporate less water before cold weather. Stop liquid feeding when daytime temperatures no longer let bees take it.
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