# Sport-Calculator.com > Sport-Calculator.com is a free fitness calculator platform built by Jonas Lindemann, a software developer and triathlete. The site provides 470+ calculators and 898+ articles covering calorie burn estimation, running performance, cycling training, nutrition, and file conversion for fitness data formats. All calorie calculators use peer-reviewed MET values from the Compendium of Physical Activities (Ainsworth et al.) or physics-based modeling. Content is written for athletes and fitness enthusiasts at all levels. ## Top Calorie Calculators - [Sit-Up Calorie Calculator](https://sport-calculator.com/calculators/gym/situp-calorie-calculator): Calories burned by sit-ups. About 0.2 kcal per rep for a 70 kg person; MET 3.0–3.8. Includes rep/calorie conversion tables. - [StairMaster Calorie Calculator](https://sport-calculator.com/calculators/gym/stairmaster-calorie-calculator): Physics-based stair climbing calorie estimator. Burns 8–16 kcal/min; 250–360 kcal in 30 min at moderate intensity for a 155 lb person. - [Jumping Jack Calorie Calculator](https://sport-calculator.com/calculators/gym/jumpingjack-calorie-calculator): Calories burned by jumping jacks by rep count and body weight. - [Push-Up Calorie Calculator](https://sport-calculator.com/calculators/gym/push-up-calories-calculator): MET-based push-up calorie estimator with weight and intensity inputs. - [Treadmill Calorie Calculator](https://sport-calculator.com/calculators/gym/treadmill-calorie-calculator): Incline-aware treadmill calorie burn with speed and grade inputs. - [Rucking Calorie Calculator](https://sport-calculator.com/calculators/running/rucking-calorie-calculator): Calories burned rucking; accounts for pack weight and terrain. - [Cycling Calorie Calculator](https://sport-calculator.com/calculators/cycling/cycling-calorie-calculator): Watt-based and MET-based cycling calorie estimator. - [5K Running Calorie Calculator](https://sport-calculator.com/calculators/running/5km-running-calorie-calculator): Distance and pace-based running calorie estimator. - [Plank Calorie Calculator](https://sport-calculator.com/calculators/gym/plank-calorie-calculator): MET-based static hold calorie estimator. - [Burpee Calorie Calculator](https://sport-calculator.com/calculators/gym/burpee-calorie-calculator): Calories burned per burpee by weight and intensity. ## Running Performance Calculators - [VDOT Calculator (Jack Daniels)](https://sport-calculator.com/calculators/running/jack-daniels-running-calculator): VDOT score, training paces, and race time predictions based on Jack Daniels' Running Formula. - [Steps to Miles Calculator](https://sport-calculator.com/calculators/general-fitness/25000-steps-to-miles-calculator): Convert step counts to distance by stride length and height. - [Steps to Calories Calculator](https://sport-calculator.com/calculators/general-fitness/steps-to-calories-calculator): Convert step counts to calories burned and distance, adjusted for body weight, height, and walking pace. - [10,000 Steps Calories Calculator](https://sport-calculator.com/calculators/general-fitness/10000-steps-calories-calculator): How many calories 10,000 steps burns (~400–500 kcal for an average adult). - [Miles to Steps Calculator](https://sport-calculator.com/calculators/general-fitness/miles-to-steps-calculator): Convert miles or kilometers into steps based on height and stride length. - [Leg Press to Squat Calculator](https://sport-calculator.com/calculators/gym/leg-press-to-squat-calculator): Converts leg press weight to squat equivalent. ## Nutrition, Calorie & Body Composition Calculators - [TDEE Calculator](https://sport-calculator.com/calculators/general-fitness/tdee-calculator): Total Daily Energy Expenditure from Mifflin-St Jeor BMR x activity, with lose/maintain/gain targets. - [BMR Calculator](https://sport-calculator.com/calculators/general-fitness/bmr-calculator): Basal Metabolic Rate via the Mifflin-St Jeor equation, with a daily-calorie table by activity. - [Calorie Deficit Calculator](https://sport-calculator.com/calculators/general-fitness/calorie-deficit-calculator): Deficit options and weekly weight-loss rates from your maintenance calories. - [Maintenance Calorie Calculator](https://sport-calculator.com/calculators/general-fitness/maintenance-calorie-calculator): The daily intake that keeps your weight stable, plus cut and gain targets. - [Protein Calculator](https://sport-calculator.com/calculators/general-fitness/protein-calculator): Daily protein target by body weight and goal (0.8–2.2 g/kg). - [Calories Burned Calculator](https://sport-calculator.com/calculators/general-fitness/calories-burned-calculator): MET-based calorie burn for any activity by weight and duration. - [Ideal Weight Calculator](https://sport-calculator.com/calculators/general-fitness/ideal-weight-calculator): Ideal body weight from Devine, Robinson, Miller, and Hamwi formulas plus healthy BMI range. - [Water Intake Calculator](https://sport-calculator.com/calculators/general-fitness/water-intake-calculator): Daily hydration target from body weight, activity, and climate. - [FFMI Calculator](https://sport-calculator.com/calculators/general-fitness/ffmi-calculator): Fat-Free Mass Index and normalized FFMI to gauge muscularity. ## Heart Rate & Fitness Test Calculators - [Max Heart Rate Calculator](https://sport-calculator.com/calculators/general-fitness/max-heart-rate-calculator): Estimate max HR (Fox, Tanaka, Gulati) with five training zones. - [Heart Rate Zone Calculator](https://sport-calculator.com/calculators/general-fitness/heart-rate-zone-calculator): Five training zones by %max or the Karvonen reserve method. - [ACFT Calculator](https://sport-calculator.com/calculators/fitness-tests/acft-calculator): Army Combat Fitness Test scoring across all six events (total /600). - [PFT Calculator](https://sport-calculator.com/calculators/fitness-tests/pft-calculator): USMC Physical Fitness Test score and class. - [Navy Body Fat Calculator](https://sport-calculator.com/calculators/fitness-tests/navy-body-fat-calculator): Body-fat % via the US Navy circumference formula. - [Cooper Test Calculator](https://sport-calculator.com/calculators/fitness-tests/cooper-test-calculator): VO2 max estimate from a 12-minute run. ## Running Pace & Race Calculators - [Marathon Pace Chart](https://sport-calculator.com/calculators/running/marathon-pace-chart): Required pace and a full 5K split chart for a goal marathon time. - [Race Time Predictor](https://sport-calculator.com/calculators/running/race-time-predictor): Predict times across distances from one result using Riegel's formula. - [Pace Chart](https://sport-calculator.com/calculators/running/pace-chart): Finish times for 5K, 10K, half, and marathon at any pace. ## Sports Stat Calculators - [ERA Calculator](https://sport-calculator.com/calculators/baseball/era-calculator): Baseball earned run average from earned runs and innings pitched. - [Passer Rating Calculator](https://sport-calculator.com/calculators/football/passer-rating-calculator): NFL passer rating from a quarterback's stat line. - [OPS Calculator](https://sport-calculator.com/calculators/baseball/ops-calculator): On-base plus slugging for hitters. ## Strength Calculators - [One Rep Max Calculator](https://sport-calculator.com/calculators/strength/one-rep-max-calculator): Estimate your 1RM for any lift from a working set, averaging the Epley, Brzycki, Lombardi, and O'Conner formulas, with a full training-percentage table. - [Bench Press 1RM Calculator](https://sport-calculator.com/calculators/strength/bench-press-1rm-calculator): Estimate your bench press one-rep max and pressing training weights. - [Squat 1RM Calculator](https://sport-calculator.com/calculators/strength/squat-1rm-calculator): Estimate your back squat one-rep max from a heavy set. - [Deadlift 1RM Calculator](https://sport-calculator.com/calculators/strength/deadlift-1rm-calculator): Estimate your deadlift one-rep max from a low-rep set. - [Strength Level Calculator](https://sport-calculator.com/calculators/strength/strength-level-calculator): Compare your lifts to beginner-to-elite strength standards by bodyweight and sex. - [Wilks Calculator](https://sport-calculator.com/calculators/strength/wilks-calculator): Wilks score from your powerlifting total and bodyweight. - [DOTS Calculator](https://sport-calculator.com/calculators/strength/dots-calculator): DOTS score, the modern successor to the Wilks coefficient. - [Barbell Plate Calculator](https://sport-calculator.com/calculators/strength/barbell-plate-calculator): Work out which plates to load on each side of the bar for any target weight. ## Nutrition Calculators - [Chipotle Calorie Calculator](https://sport-calculator.com/nutrition/restaurant/chipotle-calorie-calculator): Build-your-own Chipotle bowl, burrito, or salad with official ingredient calorie and macro data. - [Starbucks Calorie Calculator](https://sport-calculator.com/nutrition/restaurant/starbucks-calorie-calculator): Calories, macros, and sugar for Starbucks drinks and food. - [Taco Bell Calorie Calculator](https://sport-calculator.com/nutrition/restaurant/taco-bell-calorie-calculator): Build your Taco Bell order with official menu nutrition data. - [CAVA Calorie Calculator](https://sport-calculator.com/nutrition/restaurant/cava-calorie-calculator): Build-your-own CAVA Mediterranean bowl or pita with official ingredient data. - [Dutch Bros Calorie Calculator](https://sport-calculator.com/nutrition/restaurant/dutch-bros-calorie-calculator): Interactive Dutch Bros menu nutrition calculator. - [Subway Calorie Calculator](https://sport-calculator.com/nutrition/restaurant/subway-calorie-calculator): Build-your-own Subway sandwich calorie tracker. - [Panda Express Calorie Calculator](https://sport-calculator.com/nutrition/restaurant/panda-express-calorie-calculator): Full Panda Express menu with calorie and macro data. ## File Conversion Tools - [FIT to GPX Converter](https://sport-calculator.com/converters/fit-to-gpx): Convert Garmin/Wahoo FIT files to GPX format. Free online tool. - [GPX to FIT Converter](https://sport-calculator.com/converters/gpx-to-fit): Convert GPX routes to FIT format for Garmin devices. - [FIT File Editor](https://sport-calculator.com/tools/fit-file-editor): Edit and repair FIT activity files in-browser. - [FIT File Viewer](https://sport-calculator.com/tools/fit-file-viewer): Inspect FIT file data fields without software installation. ## Key Blog Articles - [100 Jumping Jacks Calories](https://sport-calculator.com/blog/100-jumping-jacks-calories): 100 jumping jacks burn 15–30 calories in 2–4 minutes; exact burn by body weight table included. - [Jumping Jacks vs Burpees Calories](https://sport-calculator.com/blog/jumping-jacks-vs-burpees-calories): Side-by-side calorie burn comparison with MET values and time-matched analysis. - [What Muscles Does the StairMaster Work](https://sport-calculator.com/blog/what-muscles-does-stairmaster-work): Muscle activation breakdown for stair climbing; gluteus maximus primary mover. - [In-N-Out Animal Style Fries Calories](https://sport-calculator.com/blog/in-n-out-animal-style-fries-calories): Calorie and macro data for In-N-Out Animal Style Fries. ## About - [About Jonas Lindemann](https://sport-calculator.com/about): Creator bio; triathlete and software developer. - [Our Science](https://sport-calculator.com/science): Methodology, MET sources, and accuracy standards.