Fitness Calculators

Calculate calories burned, cycling calories and distance to steps and other fitness calculations.

Popular:Calories Burned CalculatorCycling Calories CalculatorDistance to Steps CalculatorHalf Marathon Pace CalculatorHeart Rate Zone CalculatorMarathon Pace Calculator

All Fitness Calculators

Calories Burned CalculatorEstimate calories burned during an activity using the standard MET (Metabolic Equivalent of Task) formula, based on your weight and duration.Cycling Calories CalculatorEstimate calories burned while cycling, based on your weight and cycling duration.Distance to Steps CalculatorConvert a distance into an estimated step count, based on your stride length.Half Marathon Pace CalculatorCalculate the pace and speed needed to finish a half marathon (21.0975 km) in a target time.Heart Rate Zone CalculatorSee your five heart rate training zones (50-100% of max heart rate) based on your age.Marathon Pace CalculatorCalculate the pace and speed needed to finish a marathon (42.195 km) in a target time.One Rep Max CalculatorEstimate your one-rep max (1RM) for a lift from the weight and reps you completed, using the Epley and Brzycki formulas.Pace CalculatorCalculate your pace (minutes per km or mile) and speed from a distance and time.Race Time PredictorPredict your race time at a new distance from a recent race result, using Riegel's formula.Running Calories CalculatorEstimate calories burned while running, based on your weight and running duration.Running Pace CalculatorCalculate your running pace (minutes per km or mile) from a distance and time.Running Speed CalculatorCalculate your running speed (km/h or mph) from a distance and time.Steps to Calories CalculatorEstimate calories burned from a step count and your bodyweight.Steps to Distance CalculatorConvert a step count into distance walked or run, based on your stride length.Swimming Calories CalculatorEstimate calories burned while swimming, based on your weight and swimming duration.Target Heart Rate CalculatorFind your target heart rate zone for exercise using the Karvonen formula, based on your age, resting heart rate, and desired intensity.Training Pace CalculatorGet easy, long-run, tempo, and interval training paces derived from your current race pace.VO2 Max CalculatorEstimate your VO2 max (aerobic fitness) using the Cooper 12-minute run test — the distance you cover in 12 minutes.Walking Calories CalculatorEstimate calories burned while walking, based on your weight and walking duration.

Fitness Guides

Health & Fitness2 min read

Heart Rate Training Zones Explained: The Five-Zone Model

The standard five-zone training model divides your estimated maximum heart rate (220 minus age) into five bands from 50% to 100%, each corresponding to a different training intensity and physiological effect — from easy recovery pace at the low end to maximum, unsustainable effort at the top.

Read guide
Health & Fitness1 min read

How a Step Count Converts Into Distance Walked

Converting steps into distance is a single multiplication by stride length — the same step count covers more ground for someone with a longer stride, which is why there's no single universal steps-to-distance ratio.

Read guide
Health & Fitness1 min read

How Calories Burned During Exercise Are Calculated

Calories burned come from a MET value — how many times more energy an activity uses compared to resting — multiplied by bodyweight and a standard constant, then scaled by how long the activity lasts.

Read guide
Health & Fitness1 min read

How Calories Burned From a Step Count Are Calculated

Calories burned from steps use a simple per-step, per-kilogram rate — a heavier person burns more from the identical step count, since moving more body mass takes more energy per step.

Read guide
Health & Fitness1 min read

How Pace and Speed Are Calculated From Distance and Time

Pace is time divided by distance (minutes per km), and speed is distance divided by time (km per hour) — the same run described two different ways, since pace and speed are mathematical reciprocals of each other.

Read guide

Other Health & Fitness Subcategories

Pregnancy13 calculatorsExplore →Nutrition13 calculatorsExplore →Body Composition11 calculatorsExplore →Sleep2 calculatorsExplore →