Honey vs sugar calories: why 100 g of honey lists 306 kcal, not 400

What the official records list per 100 g

Calorie figures for honey vary noticeably from one website to the next, because each pulls from a different table. The database published by the Swiss Federal Food Safety and Veterinary Office (FSVO) provides a single point of reference, and its two records read as follows:

• Sugar, white: 400 kcal, 100 g of carbohydrates, 100 g of sugars and 0 g of water per 100 g, filed under "Sugar and sweeteners".
• Honey, from flowers: 306 kcal, 76 g of carbohydrates, 76 g of sugars and 20 g of water per 100 g, filed under "Jams and sweet sandwich spreads".

Per 100 g, honey therefore lists fewer calories than white table sugar. Both energy figures are values calculated from the composition, as the database’s methodology explains, which is also why tables built on other samples show slightly different totals for the same two foods.

Why honey has fewer calories per 100 g

White table sugar is practically pure sucrose: 100 g of product, 100 g of carbohydrates, 0 g of water. Honey is a concentrated solution of sugars, mostly free fructose and glucose, in which 20 g out of every 100 g are water, and water supplies no energy at all. At equal weight, there is simply less dry matter in the honey jar than in the sugar bag.

Expressed per gram of carbohydrate, the gap closes. Sugar delivers 4 kcal per gram of carbohydrate (400 kcal for 100 g of carbohydrates); honey delivers around 4 as well (306 kcal for 76 g of carbohydrates). Gram of carbohydrate for gram of carbohydrate, the two sweeteners look very much alike: it is the weight of water that widens the difference shown per 100 g.

Per tablespoon, the ranking can flip

Most English-language comparisons run by the spoonful rather than by weight, and by the spoon honey often comes out with more calories, not fewer. The reason is density: honey is a heavy liquid, and a tablespoon of it holds more grams than a tablespoon of granulated sugar. A spoon is not a unit of mass, so comparing a spoonful of one with a spoonful of the other means comparing two different weights, and the result can flip depending on the spoon chosen and how it is filled.

The only stable reading goes through grams: 10 g of sugar supplies 40 kcal, 10 g of honey 30.6 kcal; for 20 g, the figures read 80 kcal on one side and 61.2 kcal on the other. The portion calculator performs that conversion for any weight, in either direction.

Sweeter than sugar: an assumption, not a measurement

The other recurring argument holds that honey tastes sweeter than sugar, partly because its fructose sits free rather than bound to glucose as in sucrose, so people would spoon in less of it and end up with fewer calories overall. That is an assumption about behaviour, not a composition figure. The FSVO database records what 100 g of product contains, not the amount a person actually stirs into tea or bakes into a cake.

Perceived sweetness varies with the honey, the recipe, the temperature and the person; none of those variables appears in a nutrient table. The documented gap is the one on the records, 400 kcal against 306 per 100 g, nothing more.

What the records do not say

That leaves the recurring argument about honey’s vitamins and minerals. The official record lists their exact amounts, and their order of magnitude takes one click to check: in the ranking of foods by potassium content, honey appears nowhere near the top. Swiss and international nutrient classifications also count the sugars in honey as free sugars, the same accounting category as table sugar.

One final piece of perspective: 100 g of sugar represents 20% of a 2000 kcal reference value, 100 g of honey 15%. The comparison tool places the two records side by side, nutrient by nutrient, among the 1216 foods in the database. The conclusion belongs to the reader; the figures themselves say only this: at equal weight, less dry matter, hence fewer calories.