Useful fitness tools that work better together.
Use free calculators, planners and four connected browser workspaces, including the all-in-one Super Fitness app. Your basic profile and saved data can be reused across tools in this browser.
Connected Fitness Workspaces · Free
Four connected website-only apps: one all-in-one workspace plus focused Training, Nutrition and Progress tools. Use them directly on gentletools.com; separate Fitness app installation and downloadable packages are disabled.
Super Fitness
Free all-in-one website workspace for training, nutrition, progress, recovery, Guides and the text-only Exercise Library.
Open app →Free Web AppWorkout Planner & Tracker
Free training workspace with live set logging, plans, PR detection and progress trends, used directly in your browser.
Open app →Free Web AppNutrition & Macro Planner
Free calorie and macro workspace with targets, daily logging and adherence trends, used directly in your browser.
Open app →Free Web AppBody Progress & Readiness
Free progress workspace for readiness, weekly review, measurements and longer-term trends in your browser.
Open app →Start with a free tool
Choose a calculator or planner below. No account is required. Tools that use weight, height, distance or external load open in US units, and you can switch to Metric at any time.
Workout Plan Generator
Build a rules-based plan from your goal, schedule, equipment and current training risk inputs.
Open tool →recoveryRecovery / Readiness Score
Turn sleep, energy, soreness, pain and motivation into a transparent planning score with safety overrides and real seven-day history.
Open tool →progressBMI & Body Composition Calculator
Calculate adult BMI, waist-to-height ratio and a clearly labeled legacy circumference body-fat estimate.
Open tool →nutritionTDEE Calculator
Estimate daily maintenance calories from BMR and activity level.
Open tool →nutritionCalorie Calculator
Turn estimated maintenance calories into a transparent weight-goal target.
Open tool →nutritionMacro Calculator
Split calories into protein, carbohydrates and fat from your calorie target and body weight.
Open tool →nutritionProtein Intake Calculator
Estimate a practical daily protein range from body weight and training context.
Open tool →strength1RM Calculator
Estimate a one-rep max and practical percentage table from a submaximal set.
Open tool →cardioHeart Rate Zone Calculator
Estimate cardio training zones from age and optional resting heart rate.
Open tool →cardioRunning Pace Calculator
Convert distance and time into pace per mile, pace per kilometer and average speed.
Open tool →Progress & training load
Save real sessions, readiness check-ins and body measurements in this browser, then review separate trends over time. No sample history is inserted.
Workout Progress Dashboard
Bring real saved training volume, readiness and body-weight trends into one read-only 30/90/all-time view.
Open tool →strengthTraining Volume & Progression Calculator
Calculate multi-exercise volume load and compare totals with your last real saved session.
Open tool →strengthExercise Volume Calculator
Calculate sets × reps × external load for one exercise and save the result locally.
Open tool →progressBody Measurement Progress Tracker
Save real body measurements, chart 30/90/all-time trends, edit individual entries and export your history.
Open tool →Workout generator shortcuts
Choose the environment that matches where you train. Equipment is never assumed — select only what you actually have available.