International recipes speak in cups and ounces, Indian kitchens work in grams and katoris, and the conversion between volume and weight depends entirely on what's in the cup. This converter handles both directions and both systems, with ingredient densities built in, because a cup of maida and a cup of honey are 130 grams apart.

1 cup = 240 ml, 1 tbsp = 15 ml, 1 tsp = 5 ml, 1 oz = 28.35 g, 1 tola = 11.66 g, 1 katori is roughly 150 ml. Converting volume to weight requires the ingredient's density: a cup of flour is about 130 g while a cup of water is 240 g.
Volume ↔ weight conversions depend on the ingredient: this one used flour (maida/atta) at 0.55 g/ml. A cup of flour and a cup of honey are very different weights, always pick the right ingredient.
Because a cup measures space, not weight. Flour packs at about 0.55 g/ml, sugar at 0.85, honey at 1.42, so the same cup holds 130 g of flour but 340 g of honey. Any converter that gives one answer for "1 cup in grams" without asking the ingredient is guessing.
There is no official standard: household katoris run 120-200 ml. This tool uses 150 ml as a working average, which suits standard steel katoris. If your kitchen uses a specific bowl for portioning, measure it once with water and stick to that number.
No. A US cup is 240 ml (technically 236.6), a UK/metric cup is 250 ml, and an Australian tablespoon is 20 ml versus the 15 ml used almost everywhere else. This tool uses the US-standard 240 ml cup and 15 ml tablespoon, which is what most published recipes mean.
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