Fitness calculators that just work
Calories, macros, BMI, 1RM, running pace, Hyrox and more. All free, no signup, and based on evidence-based formulas.
Or run BMI, calories, macros, your weekly meal plan and training plan one by one.
Most-used calculators
The tools people use most: body mass index, daily calories, protein intake and macro split. All free, no signup, and based on evidence-based formulas.
From the blogNew every week
We publish new guides several times a week. Here are the latest and the recently updated.
Evidence-Based Fitness Supplements: What to Take (and What to Skip)
Only a handful of supplements have solid evidence: creatine, whey, caffeine, omega-3, and vitamin D cover 90% of the benefit. We break down what's worth it, what's hype (yes, L-carnitine and BCAAs are here), and links to buy the useful ones.
What's the Best Time of Day to Train for Strength? What the Evidence Says
You perform slightly better in the afternoon; you're more consistent in the morning. The real difference between times is small: the best time is the one you'll stick with for months.
Hyrox Times by Level: Reference Table to Set Your Goal
Hyrox Open time table by level with run/stations breakdown, so your race goal is realistic—not fantasy.