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TDEE & Body Fat FAQ — 20 answers
Quick, accurate answers about Total Daily Energy Expenditure, body fat percentage, calorie targets, macros, and our calculators. Each guide is written for real-world use, not jargon.
Fat Loss, Muscle Gain & Goals
- Build muscle and lose fat? Yes, but only under specific conditions: beginner, returning, or high body fat. Here is the recomp protocol. Read answer
- Calories to gain muscle Add a 200–400 kcal surplus to TDEE for a lean bulk. Bigger surpluses build more fat than muscle. Read answer
- Calories to lose weight Subtract a 300–500 kcal deficit from your TDEE. Here is how to size the deficit safely and avoid the common stall traps. Read answer
- What is a calorie deficit? Eating fewer calories than you burn. Here is the math, the right size, and the safety limits. Read answer
TDEE & Calorie Burn
- How accurate is a TDEE calculator? TDEE calculators land within roughly 10% for most people. Here's when to trust them and when to verify. Read answer
- Activity level & TDEE Activity multipliers swing TDEE by hundreds of calories. Here is what each tier really represents and how to pick honestly. Read answer
- How does age affect TDEE? TDEE drops gradually with age — but slower than most people think. Here is what actually changes and how to offset it. Read answer
- Muscle mass & calorie needs Each kg of muscle adds ~13 kcal of BMR. The real metabolic benefit of strength training is bigger than that small bump alone. Read answer
- How is TDEE calculated? The Mifflin–St Jeor formula plus an activity multiplier. Here is the exact math with a worked example. Read answer
- How many calories to maintain weight? Maintenance calories equal your TDEE. Here's the formula plus a 2-week verification method. Read answer
- How often should I recalculate TDEE? Every 5 kg of weight change or every 8 weeks, whichever comes first. Plus event-driven triggers like job changes. Read answer
- What is a TDEE & body fat calculator? A two-in-one tool that estimates daily calorie burn and body fat percentage from a handful of measurements. Read answer
- BMR vs TDEE BMR is your rest baseline. TDEE is the full daily burn including movement. Here is how they relate and which to use. Read answer
- What is TDEE? TDEE is the total calories you burn each day. Learn the four components, how it is calculated, and why it sets your calorie target. Read answer
Body Fat & Composition
- How to reduce body fat percentage Five fundamentals: deficit, protein, lifting, NEAT, sleep. Here's how to combine them to drop body fat without losing muscle. Read answer
- How do I calculate body fat? Five common methods compared by accuracy, cost, and convenience. The Navy tape method wins for most people. Read answer
- What is a good body fat percentage? Healthy ranges differ by gender and age. Here are the standard ACE bands plus what each one looks and feels like. Read answer
- What is body fat percentage? The share of your weight that is stored fat vs lean tissue. Here is why it beats the scale and what the ranges mean. Read answer
- What is lean body mass? Total body weight minus fat mass. The number that should drive your protein target and BMR estimates. Read answer
- Athlete body fat by sport Different sports favor different body fat ranges. Sprinters, lifters, and endurance athletes all sit in different bands. Read answer
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