A cup and tablespoon are not universal
US recipes commonly use a 240 ml cup, Korea and Japan often use 200 ml, and UK or Australian cups are often 250 ml. Most tablespoons are 15 ml, but the Australian tablespoon is commonly 20 ml.
Choose the recipe cup standard first, then convert cooking volume units.
Tablespoons use 15 ml and teaspoons use 5 ml. Cup size depends on the recipe country.
US recipes commonly use a 240 ml cup, Korea and Japan often use 200 ml, and UK or Australian cups are often 250 ml. Most tablespoons are 15 ml, but the Australian tablespoon is commonly 20 ml.
Volume measures change with how ingredients are scooped and packed. Flour, sugar, and salt are more reliable when weighed in grams.
Choose the recipe cup standard first, then convert cooking volume units. Match the units and baseline before calculating, then record the result so the same conditions can be compared later.
The result is a starting point. Adjust in small steps when ingredient brands, containers, equipment power, or starting temperature differ, and prioritize official guidance for safety-critical work.