If a recipe gives 500 g of flour and your scale displays ounces, the conversion is a mass calculation. The ingredient does not need a density estimate. Five hundred grams of flour and 500 g of sugar convert to the same number of weight ounces.
The Whatson Kitchen Weight Converter keeps this task separate from cup and spoon conversions. Its units are grams, kilograms, ordinary weight ounces and pounds.
The scale setting decides which result to use
Enter the recipe quantity and its existing unit, then select the unit displayed by your scale. The table also provides the other supported mass equivalents, so you can check a supplier label without running a second conversion.
The tool uses the ordinary avoirdupois ounce and pound, not precious metal or troy units. Its factors are 28.349523125 g per ounce and 453.59237 g per pound. NIST lists the corresponding mass conversion factors.
A 500 g flour quantity on an ounce scale
Enter 500, select grams as the starting unit and ounces as the destination. The checked result is 17.6370 oz after rounding to four decimal places.
The same quantity is 0.5 kg. The converter has changed the label and number used to describe the mass; it has not added an allowance or changed the recipe.
Your scale may display fewer decimal places than the worksheet. Use the resolution your equipment can actually measure. A long calculator result does not make a kitchen scale more precise.
A supplier pack and a recipe quantity are different entries
A 1 kg pack is 1,000 g. If the recipe uses 250 g, that is one quarter of its mass. The weight converter can clarify the units, but it does not calculate the purchase price or the cost allocated to the recipe.
Enter both quantities and the pack quote in Recipe Cost Calculator for that calculation. Its cost allocation keeps the used ingredient separate from the amount bought.
Do not select ounces for a fluid ounce instruction
A liquid label saying fl oz describes volume. It cannot be treated as a weight ounce just because both labels contain oz. Kitchen Volume Converter distinguishes US and Imperial fluid ounces.
If you need to connect volume with mass, Ingredient Weight Converter asks for an ingredient reference. That extra assumption is unnecessary when both the recipe and scale already describe mass.
Keep the original recipe quantity in your notes alongside the conversion. This makes a later check straightforward if the scale is switched back to grams or the batch size changes.