Different brands, "strains", and even individual packages of any powdered plant material will vary in its weight to volume ratio based on how compact it has become during processing, packaging, shipping, etc. You can get a cheap digital scale on Amazon for under $10 + shipping. If you take care of it, it'll last years. I 100% recommend this simple purchase as something that'll benefit any recreational drug user. I'd especially recommend it for a daily kratom user who has any history at all of problematic substance use. It's all too easy to go back for more and more spoonfuls throughout the day, trying to reach a feeling kratom just can't give. Keeping track of your doses and finding what works, then sticking to a dosing regimen (with the help of your new scale!) is good practice.