Keto BMR and Macro Calculator

Gender

Age (years)

Weight

Height

Body fat % (optional)

Improves lean-mass based calculations.

BMR formula

Activity level

Goal

Keto macro profile (percent mode)

Used when macro mode is set to percentage.

Macro calculation mode

Meals per day

Macros also shown per meal.

Informational use only; not medical diagnosis or prescription.

Example Keto BMR and Macro Scenarios

Illustrative outputs only; exact values vary per individual.

Profile	Age	Gender	Weight	Height	Activity	Goal kcal	Carbs (g)	Protein (g)	Fat (g)
Sedentary office	35	Male	80 kg	178 cm	Sedentary	2000	25	125	144
Active professional	29	Female	62 kg	165 cm	Moderate	1900	24	119	136
Gym enthusiast	40	Male	90 kg	183 cm	Very active	2600	33	163	202

Why Keto BMR Matters for Effective Fat Loss

Keto BMR represents your baseline energy use at complete rest. Aligning intake around this value helps create strategic deficits without chronic under-eating, protecting performance, hormones, and lean tissue.

How Keto BMR Guides Your Daily Macro Targets

Once your total daily energy is estimated, macros are distributed into low carbohydrates, adequate protein, and higher fats that match ketogenic principles while respecting your real energy demands.

Carbs remain low enough to support ketosis for many users.
Protein adapts to body size or lean mass for preservation.
Fat flexibly fills remaining calories as the main fuel.

Adjusting Keto BMR Targets for Individual Situations

Use higher protein modes, conservative deficits, or custom ratios for lean, very active, or performance-focused individuals instead of guessing macros blindly.

People with medical conditions should confirm numbers with qualified professionals.

Worked Example: Using This Keto BMR Calculator

Example: 32-year-old male, 80 kg, 178 cm, moderately active, choosing a mild deficit and standard ketogenic percentages with 3 meals daily.

Enter gender, age, weight, and height.
Select Mifflin-St Jeor, moderate activity, mild deficit.
Choose standard 5/25/70 percentage mode, meals = 3.
Review BMR, maintenance, goal calories, and per-meal macros.

Typical outcome: sensible deficit with very low carbs, solid protein, and fats adjusted to keep energy aligned with your metabolism.

Formulas Used

Mifflin-St Jeor: Uses weight, height, age, and gender for modern BMR estimation.

Revised Harris-Benedict: Classical alternative BMR equation.

Katch-McArdle: BMR = 370 + 21.6 × LBM (lean mass in kg).

Activity factors: TDEE = BMR × activity multiplier.

Keto macros: Either percentage-based or protein/net carb anchored, with fat filling remaining calories.

How to Use This Calculator

Enter personal data and optional body fat.
Choose BMR formula and activity level.
Select goal and macro mode.
Adjust carb cap, protein targets, and meals if needed.
Read daily and per-meal macros; export as CSV or PDF.

Always adapt results to your context and consult professionals when necessary.