New Free Fitness Calculators and Tools in Gymscore's Toolbox
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Gymscore now offers free fitness calculators including a BMR calculator, calories burned estimator, 1 rep max calculator, strength standards checker, and AI workout plan generator. No sign-up required.
Free fitness calculators that actually help you train smarter
Most fitness decisions come down to numbers. How many calories should you eat? How strong are you compared to other lifters? What's your estimated one rep max? These aren't vanity metrics — they're the foundation of any serious training program.
The problem is that most online calculators are buried behind sign-up walls, loaded with ads, or use outdated formulas. We built Gymscore's free tools to fix that. Every calculator runs entirely in your browser, uses peer-reviewed formulas, and gives you results instantly — no account required, no data collected.
Whether you're a beginner trying to figure out your calorie needs or an experienced lifter tracking your strength progress across training cycles, these tools give you the data you need to make better decisions in the gym.
Here's everything available in the toolbox right now.
BMR Calculator
Your Basal Metabolic Rate is the number of calories your body burns at complete rest — just to keep you alive. It's the starting point for figuring out how much you should eat, whether you're cutting, bulking, or maintaining.
Our BMR Calculator offers two modes. The simple mode uses the Mifflin-St Jeor equation with a standard activity multiplier to estimate your Total Daily Energy Expenditure (TDEE). The detailed mode lets you choose between three formulas — Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle — and add specific weekly activities with MET-based calorie estimates for a more accurate picture.
You get conservative, most likely, and best case estimates so you can plan your nutrition with a realistic range instead of a single number.
Calories Burned Calculator
Not all exercise burns calories equally. A 30-minute jog and a 30-minute weightlifting session can have very different energy costs depending on intensity, your bodyweight, and the specific activity.
The Calories Burned Calculator uses MET (Metabolic Equivalent of Task) values from peer-reviewed research to estimate how many calories you burn during any activity. Search from a database of exercises, enter your weight and duration, and get an accurate estimate. It's useful for meal planning, understanding your energy balance, or just satisfying your curiosity about how much that Saturday hike actually cost you.
Try the Calories Burned Calculator →
1 Rep Max Calculator
Knowing your one rep max is essential for programming — percentage-based training, RPE calibration, and tracking long-term strength progress all depend on it. But testing a true 1RM is fatiguing, risky, and not something you want to do every week.
The 1 Rep Max Calculator estimates your 1RM from any submaximal set using four proven formulas: Brzycki, Epley, Lander, and O'Conner. Pick your exercise from the dropdown, enter the weight and reps you performed, and get an average estimate along with a full rep max table showing estimated weights for 1 through 12 reps.
We also have dedicated calculators for specific rep ranges:
- 3 Rep Max Calculator — estimate your 3RM and corresponding 1RM
- 5 Rep Max Calculator — ideal for programs like Starting Strength or StrongLifts
- 8 Rep Max Calculator — useful for hypertrophy-focused training
Try the 1 Rep Max Calculator →
Strength Standards Calculator
How do you know if your bench press is "good"? Strength is relative to bodyweight, gender, and training experience. Without context, a number on the bar doesn't tell you much.
The Strength Standards Calculator compares your lifts against established standards based on bodyweight multipliers from competitive powerlifting data and large-scale user reporting. Enter your bodyweight, the weight you lifted, and how many reps — and it'll tell you whether you're at beginner, novice, intermediate, advanced, or elite level.
It includes a visual progress bar, a breakdown of what you need to reach the next level, and standards tables for exercises including bench press, squat, deadlift, and overhead press. We also have dedicated pages for individual exercises:
Try the Strength Standards Calculator →
Free AI Workout Plan Generator
If you're not sure what program to follow or you want something tailored to your schedule and equipment, the Free AI Workout Plan Generator builds a personalized training program based on your goals, experience level, available equipment, and how many days per week you can train.
It's powered by AI and generates a complete program with exercises, sets, reps, and rest periods. No generic templates — every plan is built from scratch for your situation.
Try the AI Workout Plan Generator →
All tools, zero cost
Every tool in the Gymscore toolbox is completely free with no sign-up required. Your data never leaves your browser. We built these because we believe that access to good training information shouldn't cost anything.
If you want to take things further — AI-powered form analysis on your lifts, real-time coaching feedback, and workout tracking — download the Gymscore app. But the calculators are yours to use, forever, no strings attached.
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We Built a Free AI Workout Plan Generator
Get a personalized 90-day workout plan in minutes. No sign-up required. Just answer a few questions and get a complete program tailored to your goals, equipment, and schedule.