How to Calculate Your Maintenance Calories Accurately in 2026 – Step-by-Step Guide
Knowing your maintenance calories (also called TDEE – Total Daily Energy Expenditure) is the foundation of any good nutrition plan.
Whether you want to lose fat, build muscle, or simply maintain your weight, getting this number right saves months of guessing and frustration.
Here’s the most accurate way to calculate your maintenance calories in 2026, broken down step by step.
Step 1: Calculate Your Basal Metabolic Rate (BMR)
Your BMR is the number of calories your body burns at complete rest.
The most reliable formula in 2026 is the Mifflin-St Jeor Equation.
For men: BMR = 10 × weight in kg + 6.25 × height in cm − 5 × age in years + 5
For women: BMR = 10 × weight in kg + 6.25 × height in cm − 5 × age in years − 161
Example: A 30-year-old woman who weighs 65 kg and is 165 cm tall has a BMR of approximately 1,387 calories.
Step 2: Multiply by Your Activity Level
This gives you your Total Daily Energy Expenditure, which is your maintenance calories.
Sedentary (desk job, little or no exercise): BMR × 1.2
Lightly active (light exercise 1–3 days per week): BMR × 1.375
Moderately active (moderate exercise 3–5 days per week): BMR × 1.55
Very active (hard exercise 6–7 days per week): BMR × 1.725
Super active (physical job or twice-daily training): BMR × 1.9
Using the same woman from above who is moderately active: Maintenance calories = 1,387 × 1.55 ≈ 2,150 calories per day.
Step 3: Track and Adjust Based on Real Results
Formulas are only a starting point. For the best accuracy:
Eat at your calculated number for 2–3 weeks
Weigh yourself consistently (same time of day, same conditions)
If you gain weight, reduce calories by 100–200
If you lose weight, increase calories by 100–200
If your weight stays stable, you have found your true maintenance level
The Smartest Way in 2026: Let AI Do It Automatically
Doing these calculations and adjustments manually every month can be tiring.
Welling.ai makes this much easier. It first calculates your maintenance calories using the latest formulas, then automatically adjusts them every week based on your actual food logs and weight trends.
Instead of doing the math yourself, Welling learns how your body responds and fine-tunes your daily calorie target for you.
If you want a tool that removes the manual work while keeping everything accurate, you can start with Welling.ai for free.
Final Takeaway
Calculating maintenance calories doesn’t have to be complicated. Start with the Mifflin-St Jeor formula plus your activity multiplier, then adjust based on real-world results. In 2026, combining this knowledge with a smart AI tool makes the process far more precise and effortless.
Download directly from Apple App Store.
Download directly from Google Play Store.
FAQs
Q: Which formula is most accurate in 2026? The Mifflin-St Jeor equation is still considered the most reliable for most people.
Q: How often should I recalculate? Every 4–6 weeks, or whenever your weight changes by 3–4 kg.
Q: Does age or muscle mass affect the number? Yes. Older age lowers BMR, while having more muscle mass increases it.
Q: Can I use this for weight loss? Yes. Once you know your maintenance calories, subtract 300–500 calories for a safe fat loss deficit.
