Bodybuilding Calculators
Five calculators for the questions that come up in a prep: how much muscle you carry, how long the cut needs to be, which division you fit, and what a placement is worth.
The calculators
FFMI Calculator
Fat-Free Mass Index and normalized FFMI from your height, weight and body fat, then the nearest Olympia champion to the number you land on.
Open the calculator → Contest prepContest Prep Timeline
Phase breakdown, weekly weight loss targets, calorie deficit estimates and milestone dates for a show on a date you choose.
Open the calculator → StrengthHow Strong Am I?
Squat, bench and deadlift scored against bodyweight, on the strength-standards tool that owns this question across the site.
Open the calculator → Division rulesDivision Fit Finder
Which IFBB Pro division your height, weight and build actually fit, including the Classic Physique weight caps that rule people in or out.
Open the calculator → QualificationOlympia Qualification Points
Qualification points from IFBB Pro League placements, what the running total comes to, and how far short of an invitation it leaves you.
Open the calculator →How these calculators work
Each tool runs one published formula or one published rule set. The inputs stay in your browser and in the address bar, which is what makes a result a link you can send to a coach.
Every calculator names the formula it runs on the page that uses it, so a number can be checked against its source instead of taken on trust.
The same inputs always return the same result. Nothing is randomised, weighted by traffic, or tuned to make a figure look better than it is.
Inputs travel in the URL, so a result is a shareable link and the page works with the browser back button rather than trapping you in a form.
No account, no sign-in, and nothing you type is saved to a profile. Close the tab and the numbers are gone.
About Our Bodybuilding Calculators
Our suite of bodybuilding calculators is designed for competitive and recreational bodybuilders who want data-driven insights into their physique and competition readiness. Each calculator uses established formulas and current IFBB Pro League rules.
- FFMI Calculator: uses the Kouri et al. formula to estimate your muscular development relative to your height, providing both raw and normalized scores.
- Contest Prep Timeline: helps you plan a safe, effective cut based on proven prep protocols used by top coaches.
- Genetic Potential Calculator: estimates your maximum drug-free lean mass from frame size using the Casey Butt model, then benchmarks it against measured Olympia champions.
- Lean Body Mass Calculator: splits your weight into lean tissue and fat mass, then places the lean figure against the same champion cohort.
- Division Fit Finder: uses official IFBB Pro League criteria including Classic Physique weight caps to recommend your best competitive division.
- Olympia Points Calculator: tracks qualification points using the current season’s point system.
Frequently Asked Questions
Fat-Free Mass Index (FFMI) is a measure of how much muscle you carry relative to your height.
An FFMI above 25 is widely considered the approximate natural limit for most men, making it a useful benchmark for assessing muscular development. It helps bodybuilders understand where they stand compared to natural and enhanced competitors.
Most competitive bodybuilders use a 16-20 week prep timeline. This includes 12-16 weeks of dieting, 1-2 weeks of deload/reverse, and a peak week. Losing 0.5-1% of body weight per week is generally recommended to preserve muscle mass during the cut.
Not on this page. Wilks and DOTS normalize powerlifting totals across bodyweights, which is strength scoring rather than physique assessment, so those live with our strength tools instead.
Use the strength standards tool for Wilks, DOTS and per-lift comparisons. The calculators on this page answer physique questions: muscular development, prep timing, division fit and Olympia qualification.
Your ideal division depends on your height, weight, bone structure, aesthetic goals, and training experience.
Classic Physique has specific weight limits based on height. Open Bodybuilding rewards maximum size, while divisions like Men's Physique and Bikini prioritize aesthetics and proportions.
Our Division Fit Finder uses these official criteria to recommend your best match.
IFBB Pro League athletes earn qualification points based on their placements at pro shows throughout the season. Points vary by contest tier: the Arnold Classic and other major shows award more points than regional pro shows.
Athletes need to accumulate enough points in their division to earn an invitation to the Olympia, or they can auto-qualify by winning certain designated shows.
Population models, not medical assessments
Each calculator fits your numbers to a formula built from group averages. That is enough to say where a figure sits in a distribution. It says nothing about whether you are healthy, whether a plan is safe for you, or what your body will do next.
- No result here is a diagnosis, and none of it is medical or training advice. Talk to a doctor before changing how you eat or train.
- A model is only as good as the number you feed it. Body fat estimates in particular move a result by more than most people expect.
- Division rules and qualification systems are set by the IFBB Pro League and change between seasons. Check the current rulebook before you enter a show.