100 jumbo marshmallows weigh about 2.8 kg total, assuming roughly 28 g per marshmallow. That’s about 6.2 lb.

Quick breakdown

  • 1 jumbo marshmallow: about 28 g.
  • 100 jumbo marshmallows: about 2,800 g.
  • In pounds: about 6.2 lb.

Small note

Actual weight can vary a bit by brand and size, so the real total may be slightly higher or lower. A packaged product listing also shows jumbo marshmallows commonly sold by weight rather than exact piece count, which is why the per-piece estimate is the safest way to calculate it.

TL;DR: 100 jumbo marshmallows weigh about 2.8 kg.