Cut Reverse Diet Bulk
⚡ FREE CUTTING CALCULATOR · PERSONALIZED ROADMAP $19

SETPOINT
Cut Calculator

Calculate your personalized fat loss targets — deficit size, macro split, weekly timeline, and cardio targets. Built on sports science, calibrated to your body.

✓ Mifflin-St Jeor BMR
✓ Muscle-Sparing Deficit Model
✓ 3-Phase Cut Protocol
✓ My Cut Roadmap — $19 One-Time
About You
Your Cut Goals
The Science

Why Most Cuts Fail

The most common mistake in a fat loss phase is going too deep, too fast. An aggressive deficit accelerates fat loss in the short term but triggers a disproportionate loss of lean muscle tissue — the metabolically active tissue you spent months or years building. Research consistently shows that muscle loss during a cut increases significantly when the deficit exceeds roughly 500 kcal/day without adequate protein and training stimulus to compensate.

The second mistake is static targets. Most people pick a calorie number and hold it for weeks regardless of what their body is doing. As body weight decreases, TDEE decreases with it. A deficit that was 500 kcal in week one may be 200 kcal by week eight if calories aren't adjusted. The SETPOINT Cut calculator accounts for this with a week-by-week progression that adjusts your targets as your weight changes.

0.5–1%of bodyweight/week — optimal fat loss rate
1.8–2.4gprotein per kg — muscle preservation during cut
300–500kcal/day deficit — sustainable, muscle-sparing range
The science: Helms et al. (2014) found that natural physique athletes preserving muscle during a cut required protein intakes of 2.3–3.1g/kg of lean body mass, significantly higher than standard recommendations. Hall et al. (2012) demonstrated that the composition of weight lost (fat vs. muscle) is heavily influenced by both deficit depth and protein adequacy — not just total calories.

Why Cardio Is a Tool, Not a Strategy

Cardio during a cut should complement the deficit, not create it. Relying on cardio to drive fat loss while eating at maintenance creates a hormonal environment that increases cortisol, suppresses anabolic hormones, and accelerates muscle breakdown. The most effective cut structure uses diet to create the primary deficit and cardio to add a controlled secondary contribution — with clear limits on volume to protect muscle and recovery capacity.

Tools You Need

A cut without tracking is guesswork. As your body weight drops your TDEE drops with it — targets that were accurate in week one are stale by week six if you are not adjusting. You need to see the numbers to know if the protocol is working.

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Nutrition Tracking
Calories & Macros — Non-Negotiable
During a cut, calorie precision matters more than any other phase. A 200 kcal tracking error daily adds up to over 1,400 kcal per week — enough to eliminate your deficit entirely. Protein must stay high to preserve muscle, and carbs need to be managed carefully to support training intensity without exceeding your target. You cannot do this accurately without a tracker.

MacroFactor — adaptive algorithm that watches your weekly weight trend and adjusts your targets as your body weight drops. Eliminates the need to manually recalculate every few weeks. Paid app · affiliate program pending

Cronometer — gold-standard for micronutrient tracking alongside macros. Deficits increase the risk of micronutrient gaps — Cronometer shows you what most apps miss. Free tier covers everything you need. Try free →
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Step Tracking
Daily NEAT — Already In Your Pocket
NEAT drops automatically during a cut as your body tries to conserve energy. People unconsciously move less, fidget less, and sit more — this can reduce daily calorie burn by 200–400 kcal without them realising it. Tracking your steps is the simplest way to catch and counteract this adaptation.

Your iPhone Health app, Apple Watch, Garmin, or Fitbit already does this. Set a daily step floor and maintain it throughout the cut. If the scale stalls, check your step average before dropping calories.
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Workout Logging
Progressive Overload — Muscle Retention Depends On It
The training stimulus during a cut is what signals your body to preserve lean mass. Without a log you have no way of knowing whether strength is declining — and a two-week downward trend in key lifts is an early warning sign that the deficit is too aggressive or recovery is insufficient.

Hevy — free, built for strength training. Tracks sets, reps, and load over time. Takes 30 seconds per set to log. iOS and Android. No paywall for the core features.

Strong — same core functionality, slightly different UI. Use whichever you prefer. Logging every session is what matters.

* Some links above may be affiliate links. SETPOINT earns a small commission at no cost to you. We only list tools we consider genuinely useful for executing this protocol.

Frequently Asked Questions

How much of a calorie deficit should I be in?
For natural athletes prioritising muscle retention, a deficit of 300–500 kcal/day is the evidence-based sweet spot. This produces 0.5–1 lb of fat loss per week — slower than aggressive approaches but with substantially better muscle preservation. Larger deficits can work for shorter periods in specific circumstances, but the risk of lean mass loss increases significantly above 500 kcal/day without advanced strategies to compensate.
How much protein do I need while cutting?
Research on natural physique athletes consistently points to 0.8–1.2g per pound of bodyweight (1.8–2.6g/kg) as the range needed to preserve lean mass during a caloric deficit. The lower end is sufficient for moderate deficits and higher training volumes. The upper end is appropriate during aggressive cuts or periods of high cardio volume. Protein is the single most important dietary variable during a fat loss phase — it is non-negotiable.
How long should my cut last?
The optimal cut duration depends on how much fat you need to lose and at what rate. Most evidence-based coaches recommend 8–16 weeks as a typical cut cycle, with a planned diet break at the halfway point for cuts exceeding 12 weeks. Extended cuts beyond 20 weeks without a break lead to significant metabolic adaptation — the very problem the SETPOINT reverse diet calculator is designed to fix. Plan your exit before you start.
Should I do cardio while cutting?
Yes — strategically. Cardio contributes to the caloric deficit and supports cardiovascular health, but excessive volume during a cut increases cortisol, impairs recovery, and competes with the muscle retention signal from resistance training. The SETPOINT Cut protocol uses a structured cardio ramp that starts at your current level and increases gradually — never exceeding the point where recovery is compromised. The specific weekly cardio targets are in the paid roadmap.
What should I do after I finish my cut?
After a meaningful cut, your metabolism will have adapted — resting metabolic rate drops, hunger hormones rise, and your body defends a higher weight than your new lower one. Jumping straight to maintenance or a bulk without addressing this leads to rapid fat regain. A structured reverse diet is the evidence-based exit strategy. The SETPOINT Reverse Diet Calculator was built specifically for this transition.