1 Year ago I built the free edible calculator calc420 after Scientific Edibles went offline - 49K clicks and 1.2M impressions in year one. AMA
Hey Reddit - I'm the person behind Calc420 (https://calc420.com), and I'm doing an AMA.
Calc420 is a free, no-signup toolkit for people who make cannabis edibles at home (plus a few related tools I'll get into below). Everything runs in your browser — no account, no paywall.
WHY THIS EXISTS
If you were around when Scientific Edibles was the go-to edible calculator, you probably remember how useful it was — and how much the community missed it when it disappeared.
I built Calc420 to fill that gap: same kind of science-backed potency math, but with a modern UI, more solvents/material types, CBD support, and extra tools the old site never had.
WHAT'S ON THE SITE TODAY
Calculators:
- Edible Dosage Calculator (https://calc420.com/) — THC and CBD per serving and per batch for cannabutter, coconut oil, MCT, olive oil, and alcohol tinctures
- Magic Mushroom and Truffle Dosage Calculator (https://calc420.com/shrooms.html) — microdose to high dose, scaled by body weight, species, fresh vs dried
- Cannabis Yield and Grow Light Calculator (https://calc420.com/yield.html) — rough harvest estimates from watts, grow area, light type, and method
Languages: English plus full localized versions in Spanish, German, Italian, French, and Portuguese.
Other details people usually ask about:
- 100% client-side, your inputs aren't sent to a server for calculation
- Shareable recipe links via URL parameters (bookmark or send a friend your exact setup)
- No ads
ONE YEAR IN NUMBERS (Google Search Console)
I attached a screenshot — here's the plain-English version:
Jul 2025 — Site goes live. Core edible calculator plus decarb/infusion guides. Traffic: basically nothing.
Sep 2025 — Search visibility breaks out. Rankings improve sharply within a couple of weeks.
Late 2025 — Added magic mushroom/truffle calculator (calc420.com/shrooms.html)
Late 2025 — Added yield / grow light calculator (calc420.com/yield.html)
Late 2025 — Full 5-language rollout (ES, DE, IT, FR, PT) with geo-locale detection
Apr 2026 — Traffic peak. Highest daily clicks/impressions so far. You can image why... 😅
