💪 BicepCalc

Free Strength & Fitness Calculators

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Your Complete Fitness Calculator Suite

Free, science-backed calculators for strength training, nutrition, and progress tracking. No sign-up required.

📊 1RM Estimator

Calculate your one-rep max using Brzycki, Epley, and Lander formulas. Know your true strength.

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💪 Bicep Size

Estimate your ideal arm size and genetic ceiling using the Steve Reeves formula. Based on wrist circumference.

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🍽️ TDEE & Macros

Calculate daily calories needed and macro breakdown for bulking, cutting, or maintenance. Personalized for your goals.

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🏆 Strength Standards

Compare your lifts to proven standards. See if you're novice, intermediate, advanced, or elite in bench, squat, deadlift.

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📊 One-Rep Max Estimator

Enter your weight and reps to estimate your 1-rep max.

Tip: Brzycki is most accurate for 1-6 reps. For higher reps (10+), results are estimates. Use 3-6 rep max tests for best accuracy.

💪 Bicep Size Potential

Estimate your genetic arm size potential using the Steve Reeves formula.

How it works: Wrist circumference indicates bone structure. Ideal arm = Wrist × 2.5. Maximum natural = Wrist × 2.8.

Measure around your wrist

🍽️ TDEE & Macro Calculator

Calculate your daily calorie needs and optimal macro breakdown.

Formula: Uses Mifflin-St Jeor equation for BMR, then multiplies by activity level.

🏆 Strength Standards

Compare your lifts to proven strength standards. Where do you stand?

Standards based on: Intermediate = bodyweight × multiplier. Varies by lift and experience.

📏 BMI Calculator

Calculate your Body Mass Index.

Formula: BMI = (weight in lbs / height in inches²) × 703. Categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (30+).

📊 Body Fat % Estimator

Estimate your body fat percentage using waist and height measurements.

Formula: Uses waist circumference and height. Add neck circumference for more accuracy (optional).

Measure around belly button

Measure around neck below adam's apple

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