Turning metabolic data into empowerment.
BMR·Lab exists to make the science of human energy expenditure accessible, accurate and honest. We reframe the calorie calculator not as a static widget, but as a high-precision biometric instrument — built for clarity, calibrated for people.
Clarity over clutter. Science over hype.
The internet is flooded with calorie calculators that are slow, ad-saturated and opaque about their math. We set out to build the opposite: a tool where the equation is visible, the inputs stay private, and the design disappears so the result can lead.
Whether you're managing your weight, fuelling athletic performance, or simply curious about how your body works, BMR·Lab gives you a trustworthy starting number — and the context to interpret it.
Four pillars, no compromises
Scientific Rigor
Every formula we publish is sourced from peer-reviewed literature and cited transparently.
Clinical Utility
Tools built to be genuinely useful — for patients, athletes and the curious alike.
Radical Privacy
Your inputs never leave your browser. We don't store, sell or profile your health data.
Kinetic Speed
Instant, friction-free calculation. No walls, no sign-ups, no dark patterns.
Scientific Methodology & Trust
1990
Equation published
±5–10%
Predictive accuracy
0
Data points stored
100%
Free to use