Fitness Calculator

These calculators support training, performance tracking, and weight management. The 1RM Calculator estimates your one-rep max for strength programming, the Running Pace Calculator and Pace Converter keep your run targets dialed in, and the Skinfold Body Fat Calculator gives a field-based body composition estimate. The Weight Loss Percentage Calculator tracks progress over time, and the Car-to-Bicycle Commute Savings and Calorie Calculator puts active commuting in numbers.

Browse the most-popular list to see which tools athletes and fitness enthusiasts reach for most, or open the Trending tab for what's rising right now. Every calculator is free, needs no account, and works on any device.

  • 1RM Calculator
    Calculate your One-Rep Max (1RM) with precision. Input weight lifted and repetitions performed to determine your maximum strength for any exercise. Enhance your training and track progress effectively.
  • Percentage of 1RM Calculator
    Calculate your working weight as a percentage of your one-rep max (1RM). Enter your 1RM and target percent to get the exact training load plus a full % table.
  • Running VO2 Max Calculator
    Estimate your VO2 max from a race result using the Daniels & Gilbert VDOT formula. Enter distance and finish time to get oxygen uptake in mL/kg/min.
  • Calories Burned Weight Lifting Calculator
    Estimate calories burned weight lifting using the MET formula. Enter your body weight, workout duration, and intensity to get instant kcal results.
  • 5K Pace Calculator
    Calculate your 5K running pace per kilometer and per mile from your finish time. See pace, speed in km/h and mph instantly.
  • Calories Burned by Steps Calculator
    Estimate calories burned from your step count, body weight and height. Free calculator using stride length and distance to give kcal burned walking.
  • Pace Converter
    Calculate and convert pace with this versatile Pace Converter. Transform time units between per mile, per kilometer, mph, km/h, m/min, m/s, yd/min, and yd/s for accurate running and speed analysis.
  • Jump Rope Calorie Calculator
    Estimate calories burned jumping rope by weight, duration and intensity. Uses the standard MET formula (MET 8.8–12.3) for fast, accurate results.
  • Epley 1RM Calculator
    Estimate your one-rep max (1RM) for bench press or any lift using the Epley and Brzycki formulas. Enter weight and reps to get instant results.
  • Mindful Walking Step Goal Calculator
    Track your daily step goal progress. Enter steps taken and your goal to see your completion percentage and steps remaining instantly.
  • Target Heart Rate Zone Calculator
    Find your maximum heart rate and 5 exercise target heart rate zones in bpm using the Basic (%MHR) or Karvonen heart rate reserve method.
  • Target Heart Rate Zone Percentage Calculator
    Calculate your target heart rate at any exercise intensity percentage using your age and the 220-minus-age maximum heart rate formula.
  • Bulking & Cutting Calorie Calculator
    Calculate your daily calorie target for bulking, cutting, or maintaining based on your TDEE. Bulk at 110-120% and cut at 75-85% of maintenance.
  • Barbell Plate Loading Calculator
    Figure out exactly which weight plates to load on each side of your barbell to hit a target weight. Supports pounds and kilograms.
  • VO2 Max Calculator — Cooper 12-Minute Run Test
    Estimate your VO2 max from the Cooper 12-minute run test. Enter the distance you ran in meters to get aerobic fitness in mL/kg/min.
  • Steps to Distance Calculator
    Convert your daily steps into distance in kilometers and miles using your height and gender to estimate stride length. Free and accurate.
  • Goal Weight Date Calculator
    Estimate how many weeks and the target date to reach your goal weight from a daily calorie deficit, using the 7,700 kcal-per-kg rule.
  • Cardio Calorie Burn Calculator
    Estimate calories burned during cardio from your heart rate, weight, age, and duration using the Keytel heart-rate equations for men and women.
  • Weight Gain Calorie Calculator
    Find how many calories per day you need to gain weight. Calculates your TDEE plus a bulking surplus from your target weekly weight gain.
  • Calorie Surplus Calculator
    Calculate your daily calorie target for muscle gain. Add your surplus to TDEE and estimate weekly weight gain in kg and lb.
  • Calories Burned Cycling Calculator
    Estimate calories burned cycling from your weight, ride duration and speed using MET values. Free, instant, science-based cycling calorie calculator.
  • Calories Burned Running Calculator
    Estimate the calories you burn running based on your body weight and distance covered. Free, instant running calorie calculator using kg and km.
  • Weight Loss Timeline Calculator
    Estimate how many days, weeks and months it takes to reach your goal weight from your current weight and daily calorie deficit using the 7700 kcal/kg rule.
  • Steps to Distance & Calories Calculator
    Convert your daily steps into distance (km & miles) and estimate calories burned, based on your height, weight and walking pace.

Frequently asked questions

What fitness metrics can I calculate here?

You can estimate your maximum lifting strength with the 1RM Calculator, dial in running pace and pace unit conversions, measure body fat percentage from skinfold data, calculate weight loss as a percentage, find your personalized cardio training zones with the Karvonen Formula, and even quantify the calorie benefit of cycling your commute.

How reliable are these fitness estimates?

Each tool applies an established method — for example, Epley's or Brzycki's formula for 1RM, and Jackson-Pollock equations for skinfold body fat. All outputs are statistical estimates and should be treated as training guides, not clinical measurements. These tools are NOT a substitute for medical advice; consult a qualified healthcare professional for health-related fitness planning.

How do I use the 1RM Calculator safely?

Enter the weight you lifted and the number of reps completed (typically 2 to 10 reps for best accuracy), and the calculator estimates your theoretical one-rep max. Use the result to set training percentages — never attempt a true max single without a proper warm-up, a spotter, and solid experience with the movement.

Do you store my workout or health data?

No. Every calculation is processed locally in your browser. No body measurements, pace times, rep counts, or weight values are sent to our servers or saved between visits.

Which fitness calculators are used most?

The list is ordered by actual visitor traffic, so the top entries are genuinely the most popular. Open the Trending tab to see which tools are getting the biggest recent surge in usage.

Categories