Body Fat Goal Calculator - Plan Your Cut
Calculate exactly how much weight to lose to reach your target body fat percentage while preserving muscle mass, or get an AI estimate from a photo.
The Problem with Guessing Your Goal
A 2017 review in Advances in Nutrition found that diet-induced weight loss also costs muscle, and that resistance training plus adequate protein helps preserve it. Setting targets based on your lean mass helps you plan for losing fat rather than muscle.
Crash Dieting
Too aggressive- Fast initial results
- Muscle loss
- Metabolic adaptation
- Hormonal disruption
Arbitrary Targets
No data basis- Simple to set
- May be unrealistic
- Ignores lean mass
- Often leads to disappointment
This Calculator
Calculated approach- Preserves muscle
- Realistic timeline
- Based on body composition
- Requires accurate inputs
AI Photo Analysis
Most accurate- No measurements needed
- Tracks progress visually
- Validates your targets
- Needs photo
Body Fat Goal Calculator
Your Current Stats
Use our AI to estimate this
Men: 10-14% for abs | Women: 16-20%
Track Your Transformation
See progress week by week
PhysiqueAI uses AI photo estimates to track your body fat changes over time. No measurements—just take consistent progress photos and watch the trend.
- No tape measure or calipers needed
- Track progress over time with photo history
- Body fat, muscle, lean and fat mass estimates
- Works with mirror selfies
Free account • Full results with Premium
What the Research Says
Optimal Rate of Fat Loss
A 2011 study in the International Journal of Sport Nutrition and Exercise Metabolism found that athletes who lost weight slowly (0.7% body weight/week) gained more lean mass than those who cut faster (1.4%/week):
- Slow group gained 2.1% lean body mass
- Fast group's lean mass didn't change significantly (−0.2%)
- Slow group lost more fat mass (−31% vs −21%)
Preserving Muscle During Cuts
Evidence-based recommendations for natural bodybuilding contest prep (Helms et al., Journal of the International Society of Sports Nutrition, 2014) suggest these strategies to preserve lean mass while cutting:
- Protein intake of 2.3-3.1 g/kg of lean body mass
- Lose about 0.5-1% of body weight per week
Body Fat Goal Reference
Men
Stage-ready bodybuilder, not sustainable long-term
Clear six-pack, vascular, beach-ready
Some ab definition, fit appearance
Good health range, less visible definition
Room for body composition improvement
Women
Figure/bikini competition level, not sustainable
Visible abs, athletic physique
Toned appearance, healthy and active
Average healthy range for women
Room for body composition improvement
Go Beyond Body Fat Goals
Estimate your body fat percentage, lean body mass, and muscle mass from a single photo. No measurements needed.
Free account • Full results with Premium