I just launched TrainCalc — free, accurate fitness calculators

Hey everyone 👋

I’m Alex, a developer who got tired of using outdated, untrusted fitness sites. So I built my own: TrainCalc — a clean, science-based hub of free fitness calculators.

It covers all the essentials: BMI, TDEE, macros, protein intake, body fat, heart-rate zones, and more — all with clear explanations and zero clutter.

No ads, no pop-ups, no upsells — just accurate tools that help people understand their numbers and train smarter.

I’d love your feedback on:

• Which calculators you’d actually use most

• What data or integrations you’d want next (wearables, profiles, etc.)

I’m building this solo, sharing updates as I go — and I’d really appreciate any thoughts or feature ideas from the IH community 🙌

💪 Try it here → https://traincalc.com