Scaling, nutrition, ratios and conversions — the sums you actually need while cooking.
Daily calorie needs, macro targets and water intake are worked out on the member calculators, which use your height, weight and activity level.
Most kitchen arithmetic is simple until it meets real measurements. Halving a recipe leaves you with a third of an egg. A cup of flour and a cup of sugar differ by 80 grams. An oven dial marked 180 °C runs 20 °C hotter if the fan is on. These calculators handle those cases explicitly rather than rounding them away.
Where a conversion depends on the ingredient — cups to grams above all — the density used is shown alongside the answer, so you can check it against your own scales rather than taking a bare number on trust.
