Cutting at a 30% Deficit (Fast): The Male Guide
How long does a 30% calorie deficit take for men? See weekly projections, daily calories (~1837 cal), macro split, and timeline for the Fast cutting plan. 4-6 weeks.
Last updated: February 8, 2026
Plan Overview
Deficit
30%
Fast
Difficulty
Duration
4-6 weeks
A larger calorie change for quicker progress that can feel more demanding.
Daily Calories and Macros
Based on a 5'10", 180 lb man at moderate activity (2,624 cal TDEE):
1,837
Daily Calories
135g
Protein (29%)
210g
Carbs (46%)
51g
Fat (25%)
Weekly Projections
| Week | Weight | Body Fat % | Fat Mass | Lean Mass |
|---|---|---|---|---|
| Start | 180 lbs | 25% | 45 lbs | 135 lbs |
| Week 1 | 178.4 lbs | 24.5% | 43.7 lbs | 134.8 lbs |
| Week 2 | 176.9 lbs | 23.9% | 42.3 lbs | 134.5 lbs |
| Week 3 | 175.3 lbs | 23.4% | 41 lbs | 134.3 lbs |
| Week 4 | 173.7 lbs | 22.8% | 39.7 lbs | 134.1 lbs |
| Week 5 | 172.2 lbs | 22.3% | 38.3 lbs | 133.8 lbs |
| Week 6 | 170.6 lbs | 21.7% | 37 lbs | 133.6 lbs |
Risk and Suitability
Risk Level
Moderate-HighModerate. At this deficit, muscle loss becomes a real concern. Prioritize protein, maintain heavy compound lifts, and keep the phase short.
Suitable For
Advanced men with prior cutting experience. Best for short targeted pushes when you are close to your goal. Requires strong meal prep habits and training discipline.
Not Recommended For
Beginners. People with less than 6 months of consistent training. Those who tend to binge after restriction. Anyone with hormonal or metabolic health concerns.
Adherence Tips
- •Track your food intake daily. What gets measured gets managed.
- •Eat at least 135g of protein every day to protect lean mass.
- •Pre-plan every meal. At this deficit, unplanned eating almost always leads to going over your target.
- •Keep training volume the same but reduce intensity by 10-15%. Your recovery capacity is reduced.
- •Schedule a diet break after 4-6 weeks. Two weeks at maintenance calories before continuing.
Diet Break Recommendation
Take a full week at maintenance calories after 4 weeks. Your body needs the recovery to maintain metabolic rate and hormonal function.
Frequently Asked Questions
When should I take a diet break during a 30% cut?
Take a full week at maintenance calories after 4 weeks. Your body needs the recovery to maintain metabolic rate and hormonal function.
What should I do after finishing a 30% cut?
Reverse diet carefully. Add 200 calories per week until you reach maintenance. Expect 2-4 lbs of water weight in the first week. This is glycogen and water, not fat. Give your body 4-6 weeks at maintenance before starting another phase.
How many calories should I eat on a 30% deficit?
Based on a 5'10", 180 lb man at moderate activity, a 30% deficit puts you at approximately 1837 calories per day. Your actual number depends on your weight, height, activity level, and body composition. Use FitCommit to calculate your exact target.
Will I lose muscle on a 30% deficit?
Moderate. At this deficit, muscle loss becomes a real concern. Prioritize protein, maintain heavy compound lifts, and keep the phase short.
Related Pages
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