Most Popular Fitness & Exercise Calculators
Max Heart Rate Calculator by Age
Free max heart rate calculator — estimate MHR by age with Tanaka, Fox, and Gulati formulas. Compare results, get training zones 1–5, and add resting HR.
Sprint Calculator
Free sprint calculator to find pace, speed, and splits for 60m, 100m, 200m, and 400m. Convert sprint times between distances and plan race-day split targets.
Walking Calorie Calculator
Free walking calorie calculator with incline for treadmill or hills. Enter weight, speed, grade, and time to see exact calories burned walking at any pace.
Treadmill Calorie Calculator
Free treadmill calorie calculator with speed, incline, and duration. See calories burned on treadmill, METs, cal/min, and flat vs incline comparison instantly.
Heart Rate Zone Calculator
Get Zone 1–5 targets from Max HR or lactate threshold. This heart rate zone calculator (heart rate zones calculator) optimizes endurance with training ranges.
Bench Press Calculator
Use our bench press calculator to estimate your 1RM from reps and weight, auto‑build working sets, warm‑up ladder, and plate math in kg/lb. Mobile‑friendly.
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5K Pace Calculator
Train smarter with the 5K pace calculator: convert goal time to precise per-km and per-mile pace and split targets. Get fast, accurate results instantly.
Agility Calculator for T‑Test and Pro Agility (5‑10‑5)
Use our agility calculator to time T‑Test and pro agility shuttles, compare attempts, track change‑of‑direction speed, check asymmetry, and monitor progress.
Speed, Agility & Power
Analyze running pace, race predictions, strength 1RM, and jump power in one athletic performance calculator. Mobile‑first with quick inputs and clear results.
Bench Press Calculator
Free bench press calculator to estimate your one-rep max (1RM), compare strength standards by body weight and sex, and get percentage-based training loads.
Bench Press Calculator
Use our bench press calculator to estimate your 1RM from reps and weight, auto‑build working sets, warm‑up ladder, and plate math in kg/lb. Mobile‑friendly.
Calorie Burn Calculator for Exercise and Activities
Estimate calories with the calorie burn calculator (calories burned calculator). Uses MET values with weight and duration, summarizing totals clearly.
Deadlift Calculator
Use our deadlift calculator to estimate your one‑rep max (1RM), build accurate working sets, and see plate math in kg/lb. Includes RPE input. Fast on mobile.
Endurance Calculator
Plan aerobic training with our endurance calculator. Solve pace, time, or distance in km/mi, convert speed and pace, and see per‑km/mi splits with presets.
Half Marathon Pace Calculator
Plan your 21.1 km race with the half marathon pace calculator: convert goal time to precise per‑km and per‑mile pace, plus 5K/10K splits and finish time.
Heart Rate Calculator
Use our heart rate calculator to estimate max HR, heart rate reserve, and smart training zones with %MHR or Karvonen. Enter age or known max for fast targets.
Heart Rate Zone Calculator
Get Zone 1–5 targets from Max HR or lactate threshold. This heart rate zone calculator (heart rate zones calculator) optimizes endurance with training ranges.
Injury Recovery Calculator
Use our injury recovery calculator to estimate timelines, plan milestones, and spot red flags. Get a range and phase-by-phase guide for a safer return.
Marathon Pace Calculator
Use our marathon pace calculator to set a 42.195 km goal with precise per‑km and per‑mile paces, strategies, and a split table with finish‑time projection.
Max Heart Rate Calculator by Age
Free max heart rate calculator — estimate MHR by age with Tanaka, Fox, and Gulati formulas. Compare results, get training zones 1–5, and add resting HR.
Mile Pace Calculator
Enter distance and time to see your pace per mile, per kilometer, and speed in mph/km/h. This mile pace calculator also builds mile splits and track lap times.
MPH Calculator
Use our mph calculator to convert speed and pace in seconds. Instantly switch between mph, km/h, min/mi and min/km, and estimate finish time for any distance.
Muscle Recovery Calculator
Estimate recovery time with the muscle recovery calculator. It blends sets, intensity, soreness, sleep, age, and experience to plan your next session.
One Rep Max Calculator
Estimate strength fast with our one rep max calculator (1RM). Enter weight and reps to see a blended 1RM, optional RPE, training percentages, and plate math.
Pace Converter Calculator
Free pace converter calculator to convert running pace between min/mile, min/km, and mph instantly. Get all equivalents plus race finish time estimates.
Post‑Workout Recovery Calculator
Use the post workout recovery calculator for a cooldown, hydration, protein and carb targets, plus a sleep plan tailored to your session to speed recovery.
Race Pace Calculator
Enter any distance to get precise target splits. This race pace calculator produces a complete pacing table and an accurate finish time estimate instantly.
Recovery Calculator
Use our recovery calculator to turn sleep, soreness, stress, RPE, and heart data into a clear readiness score, rest time, and a simple plan to train smart.
Rep Max Calculator
Use our rep calculator to turn a set’s weight and reps into predicted maxes from 1 to 12 reps. Compare formulas, see 1RM, and plan training with targets.
Rest Day Calculator
Use the rest day calculator to plan recovery with training load, soreness, sleep, stress, and HR change. Get today’s recommendation and a simple 7‑day plan.
Rest Time Calculator
Use the rest time calculator to set recovery between sets and intervals. Choose goal, exercise type, and work duration to get rest plus a built‑in timer.
RPE Calculator
Use our RPE calculator to turn effort into clear training targets. Plan the right load for any set, estimate e1RM from a hard set, and control weekly intensity.
Running Calorie Calculator
Use the running calorie calculator to estimate calories by pace and time. Enter weight and units to see totals, calories per mile or km, and MET results.
Running Pace Calculator
Convert time, distance, and pace instantly with the running pace calculator. Get accurate splits and speed with this pace calculator for training or races.
Sprint Calculator
Free sprint calculator to find pace, speed, and splits for 60m, 100m, 200m, and 400m. Convert sprint times between distances and plan race-day split targets.
Free Squat Calculator
Free squat calculator to estimate your one-rep max, compare your strength-to-bodyweight ratio against level standards, and plan percentage-based training loads.
Squat Max Calculator
Estimate your 1RM squat accurately with the squat max calculator and get percentage‑based training sets for both volume and intensity days. Instant results.
Strength Level Calculator
Use our strength level calculator to rank your squat, bench, deadlift and overhead press by bodyweight and sex. See 1RM estimates, per‑lift levels and a total.
Superset Calculator
Use our superset calculator to pair A-B exercises, set reps, weight, tempo and rest, then preview total session time and training volume. Plan fast. Plan now.
Target Heart Rate Calculator
Use our target heart rate calculator to set safe, effective zones for fat burn, cardio, and peak training. Enter age or max HR to see instant results.
Training Volume Calculator
Use our training volume calculator to total sets × reps × load per exercise, session, and week. Switch kg/lb, add sessions, see tonnage, and copy a CSV summary.
Treadmill Calorie Calculator
Free treadmill calorie calculator with speed, incline, and duration. See calories burned on treadmill, METs, cal/min, and flat vs incline comparison instantly.
VDOT Calculator
VDOT calculator: get your VDOT score and Daniels training paces. Enter a race time to see easy, marathon, threshold and interval paces, plus race equivalents.
Estimate Jump Height & Power
Use our vertical jump calculator to estimate jump height from reach difference or hang time, convert inches and centimeters, estimate power from body weight.
VO2 Max Calculator
Use our VO2 max calculator to estimate aerobic capacity from a 12‑minute run, a 1.5‑mile time, Rockport walk, or heart‑rate data. See age‑ and sex‑based norms.
Walking Calorie Calculator
Free walking calorie calculator with incline for treadmill or hills. Enter weight, speed, grade, and time to see exact calories burned walking at any pace.
Wilks Score Calculator
Free wilks score calculator to compare powerlifting strength across body weights. Enter your total for an instant Wilks coefficient and classification.
Workout Calculator
Use our workout calculator to plan sessions, pick exercises, set reps and sets, choose days per week, and get progression tips, rest times, and volume targets.
Zone 2 Heart Rate Calculator
Use our zone 2 heart rate calculator to find your aerobic training range by HRmax or Karvonen. Plan weekly time‑in‑zone with simple sessions you can repeat.
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Why Use Our Fitness & Exercise Calculators?
Our fitness and exercise calculator collection features 43 tools for calculating max heart rate, heart rate training zones, sprint pace, bench press one-rep max (1RM), walking and treadmill calories burned, and running performance metrics. These calculators use established exercise science formulas — including the Tanaka and Karvonen equations — to help you train smarter and track progress accurately.
Who Are These Calculators For?
Runners, cyclists, weightlifters, and anyone following a structured training program. Coaches and personal trainers use our heart rate zone and 1RM calculators for programming, while recreational athletes use the calorie burn and pace calculators to track workout intensity.
How Our Calculators Work
Enter your age, weight, workout duration, or lift numbers, and get instant results calibrated to your fitness level. Heart rate calculators use the Tanaka formula (208 - 0.7 x age) for max heart rate and Karvonen method for training zones. Strength calculators use the Epley and Brzycki formulas for 1RM estimation.
Key Benefits
- Medical-grade accuracy based on WHO and CDC guidelines
- Instant results with detailed explanations and recommendations
- 100% private — all calculations run locally in your browser
- No registration, no personal data collected
Frequently Asked Questions
How do I calculate my maximum heart rate?
What are heart rate training zones?
How many calories does walking burn?
How do I calculate my bench press one-rep max?
How accurate are treadmill calorie counters?
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