We found no exact conversion of gelatin to pectin. It is not recommended to do a straight substitution in a recipe designed with gelatin. Use a recipe that designed to use pectin.
Pectin and gelatin are substances that can thicken liquids to form a semisolid gel. While both can be used to prepare products such as jams, fruit spreads and jellies, their different properties require different cooking methods.
Learn about the difference between gelatin and pectin at SF Gate.
Other substitutes for gelatin are agar and carrageenan. These seaweed-derived products are vegan-friendly and can be used to replace gelatin in many different recipes.
Here's How To Use Gelatin shared by David Lebovitz.
Find out How to Use Pectin as a Substitute for Gelatin at Leaf.TV.