BatchPour / Prep bench Weigh the syrup.
Weigh the syrup.
Make the batch repeatable.
Start with sugar and water on a scale. Use measured juice yields to make a more useful shopping list.
A ratio is not a bottle volume.200 g sugar + 100 g water makes a 2:1 mixture by weight. It does not mean 300 mL of finished syrup.
Put those quantities to work.
Scale one recipe, set pack sizes and take a procurement sheet to the shop.
Ratio reference: Diageo Bar Academy, Low & No Q&A defines 1:1 sugar syrup by weight. This calculator does not determine shelf life. Read the simple vs rich syrup guide.