You’re standing at the counter, squinting at a label, doing mental math on whether an eighth is actually a deal — and honestly, it all starts with knowing how many grams in an ounce before you spend another dollar.

Here’s the thing nobody tells you on day one: knowing how many grams in an ounce — that’s 28.3495 grams, but we all round to 28 — is the foundation of every smart purchase you’ll ever make at a dispensary. It’s not trivia. It’s your budget’s best friend. Once you lock in that number, every price tag on the shelf suddenly makes more sense. You can compare eighths to quarters to full ounces and actually know whether you’re getting a fair deal. And in a city where medical cannabis prices vary block to block, that knowledge is genuinely powerful.

At Green Legacy, we watch patients level up in real time once they start thinking in grams. Our dispensary in DC keeps pricing transparent precisely because we want you doing this math — not guessing. We’ve built our menu so you can compare potency-per-gram across strains without needing a finance degree. Whether you’re grabbing a pre-roll on your lunch break near Dupont Circle or placing a delivery order to your apartment in Shaw, the numbers should always add up in your favor.

I had a patient last spring — let’s call her Denise — who’d been buying eighths exclusively for two years. She came in frustrated because her monthly spend kept creeping up. We sat down, walked through the potency-per-gram math on her favorite strain, and realized she’d save almost $80 a month buying quarter ounces instead. She literally said, ‘Why didn’t anyone show me this sooner?’ (Denise, if you’re reading this: you’re welcome, and yes, I still think about that high-five.) That conversation is why we wrote this guide.