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FFMI Check
The fitness calculators serious lifters actually use
Most fitness calculators online are either bloated with ads, hidden behind sign-ups, or built on outdated formulas like BMI. FFMI Check is a single-page hub for the four metrics serious lifters actually track: FFMI + Normalized FFMI (Kouri 1995), TDEE (Mifflin-St Jeor), daily macros, and 1RM (Epley + Brzycki averaged). Mobile-first, zero accounts, zero data stored — every calculation runs locally in your browser.
Hey Product Hunt 👋
I built FFMI Check after getting frustrated with the state of fitness calculators online. Most of them either:
- Bury the result behind 3 ad popups
- Force an email signup before showing you a number
- Use BMI (a 200-year-old equation) to classify athletes as "obese"
I wanted a single, fast page that runs four science-backed calculators side by side:
→ FFMI + Normalized FFMI (Kouri et al. 1995 — the gold standard for muscularity)
→ TDEE using Mifflin-St Jeor (the most accurate predictive BMR equation)
→ Daily macro split (4/4/9 kcal/g, three goal modes)
→ 1RM via averaged Epley + Brzycki (better than either formula alone)
A few principles:
• Mobile-first, every input triggers a numeric keypad
• 100% client-side — your weight, height, body fat never leave your browser
• No signups, no email walls, no upsells
• Open about every formula used (linked to source studies)
This is my first solo launch and I'd genuinely love feedback — what's missing, what's confusing, what could be a separate tool entirely. Roast it.
Thanks for taking a look
About FFMI Check on Product Hunt
“ The fitness calculators serious lifters actually use ”
FFMI Check was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #113 on the daily leaderboard. Most fitness calculators online are either bloated with ads, hidden behind sign-ups, or built on outdated formulas like BMI. FFMI Check is a single-page hub for the four metrics serious lifters actually track: FFMI + Normalized FFMI (Kouri 1995), TDEE (Mifflin-St Jeor), daily macros, and 1RM (Epley + Brzycki averaged). Mobile-first, zero accounts, zero data stored — every calculation runs locally in your browser.
On the analytics side, FFMI Check competes within Health & Fitness, Productivity and Fitness — topics that collectively have 740.2k followers on Product Hunt. The dashboard above tracks how FFMI Check performed against the three products that launched closest to it on the same day.
Who hunted FFMI Check?
FFMI Check was hunted by Sami renkyorgancı. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of FFMI Check including community comment highlights and product details, visit the product overview.
Sami renkyorgancı