Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Fitness
Macro Split Calculator
Determine your optimal daily protein, carbohydrate, and fat targets in grams and calories based on your body weight, fitness goal, and training intensity. Supports cutting, bulking, maintenance, and ketogenic splits.
Fill in the required fields to see your result.
Fitness
One Rep Max Calculator
Predict your one-rep max (1RM) — the heaviest weight you could lift for a single perfect rep — from a recent set you actually performed. Used by powerlifters, strength coaches, and bodybuilders to prescribe percentage-based training (e.g., "work up to 5×5 at 80% of 1RM") without the risk and recovery cost of repeatedly testing true maxes.
Fill in the required fields to see your result.
Key differences
| Macro Split Calculator | One Rep Max Calculator | |
|---|---|---|
| Category | Fitness | Fitness |
| Inputs required | 2 | 4 |
| Result | Protein (grams) | Estimated 1RM (kg) |
| What it does | Determine your optimal daily protein, carbohydrate, and fat targets in grams and calories based on your body weight, fitness goal, and training intensity. Supports cutting, bulking, maintenance, and ketogenic splits. | Predict your one-rep max (1RM) — the heaviest weight you could lift for a single perfect rep — from a recent set you actually performed. Used by powerlifters, strength coaches, and bodybuilders to prescribe percentage-based training (e.g., "work up to 5×5 at 80% of 1RM") without the risk and recovery cost of repeatedly testing true maxes. |