What this calculator does
Most health & fitness tools bury the answer under ads and jargon. The bmr calculator shows the number first, the breakdown next, and the assumptions in plain language.
BMR is calories your body needs at complete rest.
How to use the BMR Calculator
- Enter your values in the fields on the left.
- Results update automatically.
- Use the action buttons to copy, share or print.
The formula
Mifflin-St Jeor: (10×kg) + (6.25×cm) − (5×age) + 5 (male) or − 161 (female).
Worked example
30-year-old male, 70 kg, 170 cm: BMR ≈ 1,613 kcal.
Common mistakes
- Confusing BMR with TDEE
- Ignoring lean mass
- Different formulas give different results
When to use it
Use as the baseline for calorie planning.
Pro tips for the BMR Calculator
- For big decisions, run best-case, expected, and worst-case scenarios and compare the breakdowns side by side.
- Copy the result to paste it directly into email, Notion, or a spreadsheet cell.
- Use Print / PDF to export a clean, ad-free summary you can share with a client or advisor.
Frequently asked questions
›BMR vs RMR?
Very similar; RMR slightly higher.
›TDEE?
BMR × activity factor.
›Change over time?
Yes — declines with age and dieting.
›Improve BMR?
Build muscle.
›Formula accuracy?
±10% typical.
›Can I embed the BMR Calculator on my site?
Embedding isn't public yet, but you can link directly to this page — the URL is stable and shareable.
›How accurate is this bmr calculator?
The formulas match the standard textbook definition shown above. Rounding is applied only for display; underlying computation uses full floating-point precision. For regulated health & fitness decisions, always confirm with a qualified professional.
Embed this calculator
Drop the BMR Calculator into your own site or blog post. Free to use — a small “Powered by CalcPilot” link is appreciated.
<iframe src="https://calcpilot.tools/calculators/bmr-calculator?embed=1" width="100%" height="720" style="border:1px solid #e5e7eb;border-radius:12px;max-width:720px;" loading="lazy" title="BMR Calculator — CalcPilot"></iframe>Related calculators
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