Sports and Fitness

  • Treadmill Calories Burned Calculator
    Estimate calories burned on a treadmill from your weight, speed, incline and duration using the ACSM VO2 walking/running equation.
  • Bench Press 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.
  • Running Pace Calculator
    Free pace calculator: find running pace, time, distance and speed from any two values. Supports miles, km, marathon and more, in US or metric units.
  • Earned Run Average (ERA) Calculator
    Calculate a pitcher's Earned Run Average (ERA) from earned runs and innings pitched. Supports 9-inning baseball, 7-inning softball and 6-inning Little League.
  • Rounds Per Minute Calculator
    Calculate rounds per minute (RPM) and rate of fire from rounds fired and elapsed time. Free, instant RPM calculator for any firearm or system.
  • Miles to Steps Calculator
    Convert miles to steps instantly. Enter distance and your stride length to estimate how many steps you walked or need to walk.
  • Fish Weight Calculator
    Estimate a fish's weight from its length and girth, or from length alone using a species shape factor. Get results in pounds, ounces and kilograms.
  • NFL Passer Rating Calculator
    Calculate NFL quarterback passer rating from completions, attempts, yards, touchdowns and interceptions. Free QB rating tool with capped components.
  • Goalie Save Percentage Calculator
    Calculate a goalie's save percentage (SV%) from shots against and goals allowed. Free hockey & soccer goalie stat calculator with formula.
  • Elo Rating Calculator
    Calculate your new Elo rating after a chess or game match. Enter ratings, result, and K-factor to find expected score and rating change instantly.
  • Wilks Calculator
    Calculate your Wilks score from bodyweight and total lifted (kg). Uses the original Wilks coefficient formula for fair powerlifting comparison.
  • Scuba Weight Calculator
    Estimate how much weight you need for scuba diving based on body weight, water type (salt/fresh), and your exposure suit. Quick starting-point guide.
  • Triathlon Heart Rate Training Zones Calculator
    Calculate sport-specific run and bike heart rate training zones for triathlon from your lactate threshold heart rate (LTHR) using the Joe Friel method.
  • Cycling Power Zones Calculator
    Calculate your 7 cycling power training zones from FTP using the Coggan model. Get watt ranges for endurance, tempo, threshold, VO2 max and more.
  • Hull Speed Calculator
    Calculate the theoretical hull speed of a displacement boat from its waterline length (LWL) in feet. Get results in knots, mph, and km/h instantly.
  • Training Pace Calculator
    Turn a recent race time into easy, tempo, threshold and long-run training paces. Free running pace calculator showing seconds per km for each zone.
  • Running Split Calculator
    Calculate your per-split time and total finish time from your target running pace and distance. Plan even splits for races and training runs.
  • Steps to Miles Calculator
    Convert your step count to miles using your height. Estimate walking distance from steps with an accurate, height-based stride length formula.
  • Steps to Km Calculator
    Convert steps to kilometers instantly. Enter your step count and height to estimate distance walked in km, meters, and miles using stride length.
  • Race Time Improvement Calculator
    Calculate how much faster your new race time is versus your old time. See the percent improvement and seconds saved instantly.
  • Race Time Predictor Calculator
    Predict your race finish time at any distance using Riegel's formula. Enter a known time and distance to forecast 5K, 10K, half & full marathon times.
  • Magic Mile Calculator
    Use Jeff Galloway's Magic Mile time trial to predict your 5K, 10K, half marathon and marathon race pace and finish times.
  • Marathon Pace Calculator
    Calculate your required marathon pace per mile and per kilometer from your goal finish time. Free, fast marathon pace calculator for runners.
  • Hiking Time Calculator
    Estimate how long a hike will take using Naismith's Rule: time from distance, walking speed, and total ascent. Free, instant trek planning tool.

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