Sports-nutrition sketches usually prescribe protein as grams per kilogram of body mass. That leaves a quieter decision: which mass? Today’s scale reading, or a goal weight you are cutting or building toward? This guide owns that framing, a verified current vs goal-weight twin, and a g/kg intensity ladder. Open the Protein Intake Calculator for the live twin and ladder.
What this guide owns
- Scale weight versus protein base (same g/kg, different grams).
- Current vs goal-weight twin with a gram delta.
- Intensity ladder from an RDA-ish floor through cut / upper bands.
- Handoff to calories and a full macro plate.
It is not a PMI LTV twin and not a DTI stretch ladder.
Scale weight vs protein base
protein g/day ≈ g/kg × mass_kg
The intensity (g/kg) and the base mass are separate knobs. Changing either moves the daily gram target. A single “eat 180 g” headline hides that choice.
During fat loss, many coaches prefer goal (or leaner) mass so protein stays assertive relative to the finish line. During a slow bulk, current mass often tracks the body you train today. The calculator’s twin shows both without pretending either is a medical prescription.
The g/kg intensity ladder
Educational planning bands on the tool (primary midpoint, with a low–high corridor):
| Rung | Primary g/kg | Band (approx.) | Typical use (literacy) |
|---|---|---|---|
| RDA-ish | 0.8 | 0.8–0.9 | Sedentary floor |
| Active | 1.2 | 1.0–1.4 | General training |
| Strength | 1.6 | 1.4–1.8 | Lift / maintain |
| Muscle | 1.8 | 1.6–2.0 | Hypertrophy bias |
| Cut | 2.0 | 1.8–2.4 | Fat-loss retention |
| Upper | 2.2 | 2.0–2.4 | High planning band |
These intensities sit in the same neighborhood as sports-nutrition position stands (see ISSN protein and exercise and NIH ODS protein). They are not lab assays of your nitrogen balance. Older adults, clinical conditions, and pregnancy change needs; clinicians override websites.
Verified twin: cut · 90 kg → 80 kg at 2.0 g/kg
Matches the calculator’s Cut · goal base preset.
Current mass = 90 kg × 2.0 = 180 g/day (band ~162–216 g) Goal mass = 80 kg × 2.0 = 160 g/day (band ~144–192 g) Delta = −20 g/day at the same intensity
| Base | Mass | Protein @ 2.0 g/kg |
|---|---|---|
| Current scale | 90 kg | 180 g |
| Goal scale | 80 kg | 160 g |
Same “cut” intensity. Different gram headline. That is the twin: scale weight vs protein base.
Ladder peel at 90 kg (current)
| Rung | Grams @ 90 kg | Grams @ 80 kg goal |
|---|---|---|
| RDA-ish | 72 | 64 |
| Active | 108 | 96 |
| Strength | 144 | 128 |
| Muscle | 162 | 144 |
| Cut | 180 | 160 |
| Upper | 198 | 176 |
Climbing intensity at fixed mass usually moves grams more than swapping bases at a fixed high intensity, but the base swap still matters when you are quoting a daily target in a log.
Rerun the twin on the Protein Intake Calculator. Tap current vs goal on the twin after setting Cut.
Maintain and muscle peels
Maintain · strength (75 kg, same goal, 1.6 g/kg):
75 × 1.6 = 120 g/day (band ~105–135 g)
Muscle bias (70 → 75 kg, 1.8 g/kg):
Current 70 × 1.8 = 126 g Goal 75 × 1.8 = 135 g Delta = +9 g
Building toward a heavier goal raises the gram target at the same intensity; cutting toward a lighter goal lowers it.
Ranges, not single magic numbers
Each rung carries a low–high band. Hitting the exact midpoint every day matters less than landing in a coherent corridor most days across a training week. Food labels, cooking loss, and incomplete logging add noise.
Distribute protein across meals if that helps adherence. Timing literature is secondary to total daily protein for most lifters; use timing as a preference, not a religion.
Protein-only handoff to the plate
Once protein grams are set, leftover calories still need carbs and fats. That job lives on the Macro Calculator. Energy context: Calorie Calculator, TDEE. Body-composition context (not a protein formula): Body Fat, BMI. Training load literacy: One-Rep Max.
How to run a clean estimate
- Enter current weight (metric or imperial).
- Optionally enter a goal weight.
- Pick an intensity rung that matches the phase (maintain, muscle, cut).
- Read current vs goal grams and the delta.
- Choose which base drives your log for this block.
- Hand off to macros for the rest of the plate.
Common failure modes
- Quoting one gram number without saying which mass was the base.
- Using an RDA-ish floor for a hard cut or heavy strength block.
- Chasing an upper band without appetite, budget, or kidney clearance context.
- Treating the calculator as a diagnosis for clinical protein restriction.
- Ignoring total calories so “high protein” still leaves you in an unintended surplus or deficit.
When this sketch is not enough
- Diagnosed kidney disease or clinician-ordered protein limits.
- Pregnancy, lactation, or pediatric needs.
- Eating-disorder recovery under professional care.
- Medical nutrition therapy where grams are prescribed, not blog-banded.
FAQ
Is scale weight the same as the protein base?
No. Targets are usually g/kg × mass. Which mass you multiply (current or goal) changes the gram target even at the same g/kg.
What is the current vs goal-weight twin?
It shows daily protein grams at your chosen intensity using current weight and, optionally, a goal weight, plus the gram delta between them.
What is the g/kg intensity ladder?
Common planning intensities from an RDA-ish floor (~0.8 g/kg) through active, strength, muscle, cut, and an upper band (~2.2 g/kg), with grams at current and goal weight.
Should I use goal weight when cutting?
Many coaches prefer a goal or leaner reference mass during fat loss so protein stays high relative to the target physique. Others use current weight. The twin exists so you see both.
How is this different from the macro calculator?
Macros build a full plate inside a calorie budget. This page is protein-only: intensity and which weight is the base.
Is this medical advice?
No. Educational only. Clinical conditions need a qualified professional.
Bottom line
Pick an intensity, pick a base mass, then treat the gram number as a corridor. Run the 90→80 kg cut twin and the intensity ladder on the Protein Intake Calculator, and finish the plate on the Macro Calculator.