What sugar-to-water ratio should I use to feed bees?

Use 1:1 syrup (equal parts sugar and water by weight) in spring to stimulate brood rearing, 3:2 as a general-purpose feed, and 2:1 (two parts sugar to one part water) in fall to build winter stores. Thick syrup is easier for bees to convert to capped stores; thin syrup mimics a nectar flow.

When should I feed bees thin (1:1) syrup?

Feed 1:1 syrup in spring or whenever you want to stimulate brood rearing. Its water content mimics a natural nectar flow, encouraging the queen to lay and the colony to build up.

When should I feed bees thick (2:1) syrup?

Feed 2:1 syrup in late summer and fall to help colonies build winter stores. The lower water content means bees spend less energy evaporating it before capping.

Can I use brown sugar, honey, or molasses to make bee syrup?

No. Use only white granulated cane or beet sugar. Brown sugar, molasses, and unrefined sweeteners contain compounds that cause dysentery in bees. Honey from unknown sources can also transmit disease.

Should I boil sugar syrup for bees?

No. Heat the water until warm enough to dissolve the sugar, but do not boil. Boiling sugar syrup produces hydroxymethylfurfural (HMF), which is toxic to bees.

How much sugar do I need for one liter of 1:1 syrup?

For one liter of finished 1:1 syrup, you need roughly 715 g of water and 715 g of white granulated sugar. The exact amounts depend on the ratio and final volume — this calculator computes them based on sucrose displacement.

Syrup Calculator

Calculate sugar and water amounts for feeding syrup

Free sugar syrup calculator for beekeepers. Use 1:1 (thin) syrup for spring stimulation, 3:2 (medium) as an all-purpose feed, and 2:1 (thick) for fall feeding to build winter stores. Pick a container size and ratio — exact sugar and water weights are computed from sucrose displacement so the finished syrup fills your container.

Units

Switch between metric and imperial measurements

Syrup Ratio

Sugar to water ratio (by weight to volume)

Container Size

Total volume of syrup to prepare

Results

Water

613 ml

(613 g)

Sugar

613 g

Total weight

1.23 kg

Instructions

Measure 613 ml (613 g) of water
Heat the water until warm (not boiling)
Add 613 g of white granulated sugar
Stir until the sugar is completely dissolved
Let the syrup cool to room temperature before feeding

Tips & Usage Guide

Thin syrup (1:1)

Best for spring feeding to stimulate brood rearing and simulate a nectar flow. Use when bees need encouragement to build up.

Medium syrup (3:2)

A good all-purpose syrup. Works well for both spring stimulation and light fall feeding.

Thick syrup (2:1)

Best for fall/autumn feeding to build up winter stores. Bees can store it quickly with less effort to evaporate excess water.

General tips

Always use white granulated sugar — never brown sugar, molasses, or artificial sweeteners. Do not boil the syrup as it can create HMF (hydroxymethylfurfural) which is toxic to bees. Feed in the evening to reduce robbing.