MyFitnessPal tracks food, calories and macronutrients, with tools for nutrition logging and fitness goals.
Simple Science Fitness
Simple Science Fitness provides exercise and nutrition resources with calculators for calories, macros, heart rate and strength standards.

About Simple Science Fitness
Simple Science Fitness provides exercise and nutrition calculators, including tools for calories, macronutrients, heart rate zones, VO2 max, biological age, desired body weight, and strength standards. The heart rate tool calculates zones from age and an optional resting heart rate, and lists difficulty, purpose, benefits, and example activities for five zones.
The heart rate table notes it is designed for the average person with a resting heart rate of 60–80 BPM, with a lower resting rate resulting in lower BPM values within the zones.
Key features
- Calorie Calculator
- Macronutrient Calculator
- Heart Rate Zone Table using age and optional resting heart rate
- VO2 Max Calculator with results table for men and women
- Biological Age Calculator
- Desired Body Weight and Strength Standards calculators
- Offers several fitness calculators on one calculators page
- Heart rate zones include purpose, benefits, and example activities
- VO2 max results include interpretation ranges for men and women
- Heart rate table is designed for average resting rates of 60-80 BPM
Simple Science Fitness at a glance
- Website
- ss.fitness/calculators
- Category
- Health & Fitness › Health & Fitness Resources
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Simple Science Fitness FAQ
What information is needed for the Heart Rate Zone Table?
Does the Heart Rate Zone Table apply to people with low resting heart rates?
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