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TDEE Calculator
Total Daily Energy Expenditure
2,340
calories per day

BMR is your body's rent. TDEE is rent + utilities.

Caffeine Half-Life
Caffeine remaining at bedtime
24 mg
still in your system at 10 PM

Every 5 hours, half. That's the whole model.

Vitamin D Status
Blood level interpretation
Sufficient
45 ng/mL = 112 nmol/L

Multiply by 2.5. That's the whole conversion.

220+ Peer-Reviewed Citations
90+ Free Tools
28 Evidence-Based Guides
Pulse verified 227 citations across 92 calculators · Last updated March 2026
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How it works

Built different. By design.

Every calculator starts with research and ends with a citation. No guesswork. No paywalls. No ads hiding the answer.

Step 01
Reads the Research

Pulse analyzes peer-reviewed papers from PubMed, NIH, and WHO to find validated clinical formulas.

Step 02
Builds the Tool

Transforms clinical equations into instant calculators with clear inputs, validated ranges, and real-time results.

Step 03
Cites Every Source

Every result links back to the original research. You can verify the science yourself, always.

Guides

Understand What Your
Numbers Mean

28 evidence-based guides that explain your results, what to do next, and when to talk to a doctor.

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