Tablespoon of gelatin is how many sheets of gelatin?

Gelatin, when at its purest, is best measured by weight regardless of it being sheet or powder. Sheets come in a range of "grades" graduating up from bronze to silver, gold and finally titanium or...

1.37 but I would consider using pot rather than "Gelatin Powder"

4 ounce

10 grams

no, 6 sheets of gelatine is the equivalent of 3 teaspoons of powdered gelatine (a 10g sachet). This is enough to soft-set 480ml/16fl.oz. of liquid.