Syrup Ratio Calculator
Pick a ratio (or set your own), tell it your batch size or the sugar you have, and get the sugar and water weights plus an approximate sugar concentration.
Syrup quantities (1:1)
Choosing a ratio
A thin, 1:1 “simple syrup” is mostly water and dissolves the least sugar per gram of liquid — it's the standard for sweetening cold drinks and thinning glazes. Moving up to a 1.5:1 or 2:1 syrup packs more sugar into the same amount of water, which is useful when you want a syrup that's already concentrated before you start cooking it further toward a candy stage. A 3:1 rock-candy syrup is nearly saturated at room temperature, which is exactly the point: as the water slowly evaporates, the excess sugar has nowhere to go but into large, clear crystals.
Working by weight rather than volume avoids the guesswork of how tightly sugar packs into a cup, so a kitchen scale is worth the small investment if you make syrups regularly.
Frequently Asked Questions
What does a sugar-to-water ratio like 2:1 mean?
It's a ratio by weight: for every 2 parts of sugar you use 1 part of water. A 300g batch at 2:1 splits into 200g sugar and 100g water, because sugar makes up 2 of the 3 total parts. Ratios are usually written sugar first, water second.
Why use a richer ratio like 2:1 or 3:1 instead of 1:1?
A richer syrup starts with less water to boil off, so it reaches a given sugar stage faster and produces a syrup that's already more concentrated at room temperature — useful for rock candy, some glazes, and syrups you want to store without them crystallizing or fermenting as readily.
What is the 'sugar concentration' figure the calculator shows?
It's an approximate Brix-style percentage: the sugar's weight as a share of the syrup's total weight. A 2:1 syrup by weight works out to about 66.7% sugar, which is a useful sanity check when comparing recipes that describe their syrup differently.
Does this account for sugar that dissolves and changes volume?
No — this calculator works entirely in weight (grams), which sidesteps the volume-change problem entirely. If your recipe is written in cups or ounces, weighing your sugar and water on a kitchen scale will give you a far more consistent result than measuring by volume.
Educational tool only. Figures are simple weight-ratio arithmetic rounded for display; verify with a kitchen scale for a batch that has to come out exactly right.