💪 FitDeck

Free Fitness & Workout Calculators

23 fast, private tools for strength, running, body metrics and nutrition. No sign-up, no downloads — everything runs right in your browser.

Try One-Rep Max CalculatorBrowse all tools

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Strength & Power

One-rep max, Wilks/DOTS, lift ratios, percentage charts and plate math.

One-Rep Max CalculatorRep Max Calculator (Reps → 1RM)1RM Percentage ChartWilks & DOTS Score Calculator+2 more
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Cardio & Running

Pace, race predictions, heart rate zones, VO2 max and calorie burn.

Running Pace CalculatorRace Time PredictorHeart Rate Zone CalculatorVO2 Max Calculator+4 more
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Body Metrics

BMI, BMR, TDEE, body fat, lean mass and other body composition tools.

BMI CalculatorBMR CalculatorTDEE CalculatorBody Fat Calculator (Navy Method)+1 more
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Training & Nutrition

Macros, protein, hydration and training load calculators.

Macro Calculator (Athlete)Protein Intake CalculatorDaily Water Intake CalculatorTraining Load Calculator (ACWR)

All 23 Tools

One-Rep Max Calculator
Calculate your one-rep max (1RM) from any weight × reps set using the …
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Rep Max Calculator (Reps → 1RM)
Convert multi-rep sets to an estimated one-rep max and see your 2–12 r…
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1RM Percentage Chart
Generate a full percentage chart from your one-rep max: 95%, 90%, 85%,…
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Wilks & DOTS Score Calculator
Compare powerlifting totals across bodyweights with Wilks and DOTS sco…
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Bench-Squat-Deadlift Ratio Calculator
Check if your bench, squat and deadlift are balanced. Compare your lif…
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Barbell Plate Calculator
Work out which plates to load on each side of the barbell for any targ…
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Running Pace Calculator
Calculate running pace from time and distance, or predict finish time.…
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Race Time Predictor
Predict your 5K, 10K, half and marathon times from a recent race resul…
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Heart Rate Zone Calculator
Calculate your 5 training heart rate zones from age or a known max HR.…
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VO2 Max Calculator
Estimate your VO2 max from a recent distance-run performance using the…
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Calorie Burn Calculator (MET)
Estimate calories burned for 50+ activities using MET values — running…
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Pace to Speed Calculator
Convert running pace to speed and back: min/km, min/mile, km/h and mph…
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Cycling Speed & Time Calculator
Calculate cycling speed from time and distance, or estimate ride time …
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Steps to Calories Calculator
Convert your daily step count into estimated calories burned, adjusted…
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BMI Calculator
Calculate your Body Mass Index in metric or imperial units and see you…
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BMR Calculator
Calculate your Basal Metabolic Rate with the Mifflin-St Jeor formula —…
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TDEE Calculator
Calculate your Total Daily Energy Expenditure and get calorie targets …
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Body Fat Calculator (Navy Method)
Estimate body fat percentage with the US Navy circumference method — j…
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Lean Body Mass Calculator
Calculate lean body mass from weight and body fat percentage, plus you…
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Macro Calculator (Athlete)
Get personalized protein, carb and fat targets for cutting, maintainin…
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Protein Intake Calculator
Calculate your daily protein needs by body weight, goal and training t…
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Daily Water Intake Calculator
Calculate daily water needs from body weight, training and climate. Li…
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Training Load Calculator (ACWR)
Calculate your Acute:Chronic Workload Ratio to see if your training ra…
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Free Fitness & Workout Calculators

FitDeck gives you 23 free fitness tools in one place: one-rep max and percentage calculators for strength training, Wilks and DOTS scores for powerlifting, pace, race prediction and heart rate zone tools for runners and cyclists, BMI, BMR, TDEE, body fat and lean mass calculators for body composition, plus macro, protein, water and training load calculators for nutrition and programming. Every tool runs entirely in your browser — instant results, nothing uploaded, no account needed. Bookmark FitDeck and train with real numbers.