Sports and Fitness

  • Army Body Fat Calculator (US)
    Estimate body fat with the US Army AR 600-9 ABCP tape method. Enter height, neck, abdomen (men) or waist & hip (women) in inches.
  • Earned Run Average (ERA) Calculator
    Calculate a baseball pitcher's ERA from earned runs and innings pitched. ERA = (earned runs / innings pitched) × 9. Free, fast, and accurate.
  • Three-Way Playoff (Tomoe-sen) Win Probability Calculator
    Compute each contestant's chance of winning a three-way sumo playoff (tomoe-sen, Japan). Fair case gives 5/14, 5/14, 4/14; supports uneven strengths.
  • Bike Pace Calculator
    Calculate your cycling pace and average speed from ride distance and time. Get min/sec per km or mile plus km/h or mph instantly.
  • Anaerobic Threshold Calculator
    Estimate your anaerobic threshold (AT) heart rate from age and intensity percentage. Uses AT_HR = % × (220 − age) for training zone targeting.
  • Air Force PT Calculator
    Estimate your US Air Force PT test score from push-ups, sit-ups and 1.5-mile run time. See your total points and whether you pass (75+).
  • Japan Series (NPB Best-of-Series) Win Probability Calculator
    Estimate NPB postseason odds: enter a single-game win probability and a predicted series score to get the exact-result and overall series win probabilities.
  • Archery Draw Length Calculator
    Find your archery draw length from your arm span using the wingspan ÷ 2.5 method. Enter your wingspan in inches for an instant draw length estimate.
  • 5/3/1 Training Max Calculator
    Calculate your 5/3/1 Training Max (90% of 1RM) and all weekly working-set weights (65/75/85%, 70/80/90%, 75/85/95%) instantly.
  • 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.
  • Steps to Calories Calculator
    Convert your step count into calories burned walking. Enter steps, body weight, and stride length to estimate kcal burned and distance covered.
  • Maximum Heart Rate (MHR) Calculator
    Estimate your maximum heart rate from age using the Fox (220−age) or Tanaka (208−0.7×age) formula, plus 50/70/85% training zones in bpm.
  • Heart Rate Training Zones Calculator
    Calculate your max heart rate and the 5 training zones (50–90%) from your age using the 220−age formula. Free, instant heart rate zone calculator.
  • FTP Calculator
    Calculate your cycling FTP (Functional Threshold Power) from a 20-minute test. FTP = 95% of 20-min average power, plus power-to-weight ratio.
  • Earned Run Average (ERA) Calculator
    Calculate a pitcher's Earned Run Average (ERA) from earned runs and innings pitched. Free baseball ERA calculator with worked example.

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