Best 12 Fitness Calculators Apps

242+ iOS apps curated and reviewed

4.3 avg rating
19 free apps
Updated August 2026

From beginner-friendly picks to power-user tools, our 12 fitness calculators list covers 242+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.

Compare top 12 Fitness Calculators Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
112 Fitness Calculators12 Fitness CalculatorsFree was $3.995.0★ (3)NoNoMay 2026
2Fitness Frog CalculatorsFitness Frog CalculatorsFreeNoNoJul 2026
3Air & Space Fitness CalculatorAir & Space Fitness Calculator$0.994.6★ (116)NoNoAug 2026
4Fitness Calc ProFitness Calc ProFree was $0.99NoNoMay 2026
5EGYM FitnessEGYM FitnessFree3.7★ (153)NoNoAug 2026
6FittestFittestFreeNoNoAug 2026
7Military Fitness ScoreMilitary Fitness ScoreFreeNoNoAug 2026
8BMR CalculatorBMR CalculatorFree4.7★ (241)NoNoJul 2026

Top Picks for 12 Fitness Calculators

12 Fitness Calculators#1

12 Fitness Calculators by Edward A. Greenwood, Inc.

Fitness & exercise calculators
Editor's Choice
💪 Health & Fitness
5.0(3 ratings)
Free
12 Fitness Calculators screenshot 1
12 Fitness Calculators screenshot 2
12 Fitness Calculators screenshot 3
12 Fitness Calculators screenshot 4
12 Fitness Calculators screenshot 5
12 Fitness Calculators screenshot 6

This app offers a suite of 13 popular fitness, exercise, and weight loss calculators using scientifically accurate formulas. It provides detailed instructions and interprets results, supporting both metric and English units. The app prioritizes user privacy by not tracking or collecting data and is ad-free.

Air & Space Fitness Calculator#3

Air & Space Fitness Calculator by Patrick Smith

Fitness Assessment Calculator
Worth Considering
💪 Health & Fitness
4.6(116 ratings)
$0.99
#9in Health & Fitness
Air & Space Fitness Calculator screenshot 1
Air & Space Fitness Calculator screenshot 2
Air & Space Fitness Calculator screenshot 3
Air & Space Fitness Calculator screenshot 4
Air & Space Fitness Calculator screenshot 5
Air & Space Fitness Calculator screenshot 6

Calculate your Air Force or Space Force fitness assessment score with up-to-date charts and component options. This tool helps determine exemptions, adjust for altitude, and find the best combination of tests to maximize your score. It also provides access to current regulations for reference.

More 12 Fitness Calculators apps to explore

4
Fitness Calc Pro
Fitness Calc Pro
Fitness Calc Pro
26 Health & Fitness Calculator
Free
$0.99 | 100% OFF
💪 Health & Fitness
(0)
5
EGYM Fitness
EGYM Fitness
EGYM Fitness
Fitness App by EGYM
Free

Easily monitor your workouts, track progress, and achieve your fitness goals with engaging insights and motivation. Offers personalized training plans, fun challenges, and class booking.

Workout trackingPersonalized training plansActivity level milestones
💪 Health & Fitness
(153)
free
6
Fittest
Fittest
Fittest
Fitness tech made easy
Free

This fitness app offers personalized workout plans and meal recommendations to help users achieve their health and wellness goals. It provides advanced fitness metrics, progress tracking, and the ability to sync with gyms or trainers. Stay motivated and see results with this intuitive companion.

Personalized workout plansDynamic meal recommendationsProgress tracking
💪 Health & Fitness
(0)
ad-supported
7
Military Fitness Score
Military Fitness Score
Military Fitness Score
PT scoring, goals & training
Free
💪 Health & Fitness
(0)
8
BMR Calculator
BMR Calculator
BMR Calculator
by Uncanny Apps
Free

Estimate your daily calorie needs based on your basal metabolic rate. Input your height, weight, age, and gender to calculate your BMR and understand how activity levels affect your caloric intake. Uses the standard Harris Benedict Equation for accurate results.

BMR calculationCalorie consumption guidanceActivity level impact analysis
💪 Health & Fitness
(241)
free
9
BMI Calculator – Weight Loss
BMI Calculator – Weight Loss
BMI Calculator – Weight Loss
Calculate your ideal weight
Free

Calculate and track your Body Mass Index (BMI) with this user-friendly app. It provides personalized health insights, ideal weight recommendations, and supports various units and classification systems. Monitor your weight journey and understand health risks.

Instant BMI calculation with animated gaugePersonalized health insightsIdeal weight recommendations
💪 Health & Fitness
(27K)
free with in-app purchases
10
Health calculator: weight, BMI
Health calculator: weight, BMI
Health calculator: weight, BMI
Weight gain / loss, pregnancy
Free

This app helps you manage your health by calculating key metrics like BMI, daily calorie needs, and target heart rate zones. It also assists with pregnancy planning and hydration goals based on your personal data.

BMI calculationDaily calorie requirementsTarget heart rate zones
💪 Health & Fitness
(47)
ad-supported
11
WELLFIT FITNESS
WELLFIT FITNESS
WELLFIT FITNESS
by HONGKONG ZHONGKANG INTERNATIONAL LIMITED
Free

This app offers a comprehensive fitness experience by integrating personalized training programs, smart equipment, and data-driven health management. It aims to make fitness more intelligent and efficient for individuals and businesses.

Personalized training programsSmart fitness equipment integrationData-driven health management
💪 Health & Fitness
(117)
free
12
MiniBeast
MiniBeast
MiniBeast
by Minibeast Enterprises LLC
Free

Streamline your fitness routines with this app. Track workouts, calculate nutritional needs, and monitor your progress. Compatible with iPhone and iPad.

Workout program viewingWorkout streamliningMacro split calculation
💪 Health & Fitness
(112)
free
13
Bar Is Loaded - Gym Calculator
Bar Is Loaded - Gym Calculator
Bar Is Loaded - Gym Calculator
It's leg day, not brain day.
Free

This app simplifies weightlifting calculations, instantly determining the correct plates to load onto a barbell. It offers custom settings for inventory and a reverse calculator, along with tools for meet preparation and performance scoring.

Plate loading calculator (KG/LB)Customizable barbell and plate inventoryReverse calculator for adding plates
💪 Health & Fitness
(251)
free with in-app purchases
14
1RM Percentage Calculator
1RM Percentage Calculator
1RM Percentage Calculator
Percentage-Based Workout Util
Free

This app helps you plan and calculate percentage-based workouts. It includes a one-rep max estimator and customizable weight settings for a personalized training experience. Easily track your sets and reps without manual calculations.

Percentage-based workout sets calculatorOne rep max estimate calculatorCustomizable plate weights
💪 Health & Fitness
(3)
free with in-app purchases
15
FitApp Fitness calculators
FitApp Fitness calculators
FitApp Fitness calculators
Bodyfat % Muscle and Calories
Free
💪 Health & Fitness
(0)
16
BMI Calculator‰
BMI Calculator‰
BMI Calculator‰
Body Mass Index Calculator
Free

Easily calculate your Body Mass Index (BMI) with this straightforward application. It provides a quick way to understand your weight status based on your height and weight.

BMI calculationInput heightInput weight
💪 Health & Fitness
(24K)
ad-supported
17
Girl Math: Plate Calculator
Girl Math: Plate Calculator
Girl Math: Plate Calculator
Barbell math for heavy lifters
Free

This app simplifies barbell weight calculations for lifters. Quickly determine the plates needed for your target weight, or calculate the total weight from the plates on the bar. Customize with your gym's bar weight and available plates.

Instant plate math for target weightsReverse mode to calculate total weight from platesCustomizable bar weight and plate availability
💪 Health & Fitness
(1)
freemium
18
Perfect Weight Calculator
Perfect Weight Calculator
Perfect Weight Calculator
BMI Calculator Perfect Weight
Free

This tool accurately calculates your ideal weight using your height, current weight, age, and gender. It offers a user-friendly interface for easy data entry and interpretation, serving as a reliable companion for your health and fitness journey.

Ideal weight calculationPersonalized estimationsIntuitive interface
💪 Health & Fitness
(6)
free
19
TDEE Calculator & BMR-TDEECalc
TDEE Calculator & BMR-TDEECalc
TDEE Calculator & BMR-TDEECalc
Macros, BMI & Calorie Planner
Free

This app helps you manage your fitness journey by calculating key metrics like TDEE, BMR, BMI, and ideal body weight. It also provides daily macronutrient recommendations for personalized nutrition plans. Enjoy a private, ad-free experience with all data stored locally.

TDEE CalculatorBMR CalculatorBMI Calculator
💪 Health & Fitness
(4)
free
20
Fitness Metrica - power and dietary indicators
Fitness Metrica - power and dietary indicators
Fitness Metrica - power and dietary indicators
by Sergey Malyugin
Free
💪 Health & Fitness
(0)

FAQ about 12 Fitness Calculators

What are the best 12 fitness calculators apps for iPhone?
12 Fitness Calculators tops our 12 fitness calculators apps ranking as of August 2026, with a 5.0-star average from 3 App Store ratings, and it's free to download.
Yes — 19 of the top 12 fitness calculators apps we rank are free to download, including 12 Fitness Calculators and Fitness Frog Calculators.
12 Fitness Calculators has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 242+ 12 fitness calculators apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
12 Fitness Calculators offers 13 tools including BMI, BMR, body fat percentage (two methods), calories burned, daily calorie needs, distance-time-pace-speed, metric/English conversion, 1 rep max, resting heart rate timer, and splits for various activities. It uses scientifically accurate formulas from reputable organizations.
No, 12 Fitness Calculators does not track you, collect any data, or include advertising. The app is designed with user privacy as a priority.