How to Get Ripped, Cutting Calculator

Garthe 2011 randomized elite athletes to slow (0.5%/wk) versus fast (1.4%/wk) cuts. Both lost weight, but the slow group preserved lean mass and improved strength on bench, squat, and vertical jump. The fast group lost lean mass and dropped performance. Helms 2014 backs this with the 0.5 to 1% guideline.

Helms 2014 raises the bar from a normal 0.8 g/lb to 1.0-1.4 g/lb during contest prep because protein needs go up in a deficit. The body breaks down lean tissue when calories are low and protein is the buffer. Pellegrino 2016 showed 1.1 g/lb plus resistance training preserves nearly all lean mass during a 25% deficit.

Trexler 2014 and the MATADOR study (Byrne 2018) both found that intermittent diet breaks or refeeds reduce metabolic adaptation versus continuous cuts. We default to one higher-carb day every 14 days at moderate body fat, and every 7 days under 14% or when cutting harder than 0.85% per week.

Less than most people think. ACSM 2018 recommends 150-300 minutes of moderate-intensity weekly cardio for weight management. The calculator scales this with deficit size. A 600+ calorie deficit gets 240 min/week, a smaller deficit gets less because diet already does the work. Lifting always comes first.

Eating below BMR triggers larger metabolic adaptation, more muscle catabolism, sleep disruption, and hormonal downregulation. We floor the daily target at the higher of 1,200 cal or your calculated BMR. If the math wants you below that, the calculator extends the timeline instead.

If the calculator shows a weekly loss rate above 1% of bodyweight, you will see a warning. Push longer. A 20-pound fat loss takes around 5 to 6 months at safe rates, not 8 weeks. Crash cuts cost muscle and metabolic rate that takes months to recover.

Katch-McArdle uses lean body mass directly. Mifflin-St Jeor uses weight, height, and age, which works fine on average but underestimates TDEE for muscular lifters and overestimates for high body fat individuals. If you know your body fat percentage, Katch is more accurate.