Fitness Calculators
Free fitness calculators for calorie needs, macro splits, protein intake, running pace, heart rate zones, and one-rep max estimation. Optimize every workout.
No sign-up · No data sent to servers · Instant results
Find affordable coverage that fits your budget and needs.
Personalized meal plans delivered to your door.
Sponsored · We may earn a commission at no cost to you
Calorie Calculator
Calculate daily calories (TDEE/BMR) with macro breakdowns for your goals
Use tool →Calories Burned Calculator
Calculate calories burned across 95+ activities organized in 9 categories using MET values, with heart rate zone estimation and weekly planning
Use tool →Heart Rate Zone Calculator
Calculate your target heart rate zones for optimal training using the Karvonen formula
Use tool →Macro Calculator
Calculate daily protein, carbs, and fat needs for your fitness goal
Use tool →One Rep Max Calculator
Calculate your one-rep max using 7 proven strength formulas
Use tool →Protein Calculator
Calculate your optimal daily protein intake based on weight, activity level, and fitness goals
Use tool →Running Pace Calculator
Calculate running pace, finish time, or distance with split times
Use tool →TDEE Calculator
Calculate your Total Daily Energy Expenditure based on BMR, activity level, and body composition
Use tool →Frequently Asked Questions
What fitness calculators are available?▾
NexTool provides free fitness calculators including daily calorie (TDEE) calculators, macro nutrient splitters, protein intake estimators, running pace calculators, target heart rate zone finders, and one-rep max estimators.
How do I figure out my macro split?▾
Enter your daily calorie target and preferred diet approach (balanced, low-carb, high-protein, keto) into our macro calculator. It breaks your calories into precise grams of protein, carbs, and fat.
Can I calculate my running pace for races?▾
Yes. Our running pace calculator lets you enter your target race distance and time to get your required pace per mile or kilometer. It also works in reverse -- enter a pace to see projected finish times for common race distances.
More Calculators
Financial Calculators
Free financial calculators for mortgages, loans, interest, savings, investments, and retirement planning. Get instant, accurate results with no sign-up required.
41 toolsHealth & Fitness Calculators
Free health calculators for BMI, calories, macros, body fat percentage, heart rate zones, and protein intake. Track your fitness goals with instant, private results.
8 toolsReal Estate Calculators
Free real estate calculators for mortgage payments, home affordability, property taxes, rent-vs-buy comparisons, closing costs, and refinance savings.
24 toolsTax Calculators
Free tax calculators for income tax, capital gains, payroll tax, sales tax, and self-employment tax. Estimate your tax obligations instantly and plan smarter.
15 toolsDebt Calculators
Free debt calculators for loan payoff, credit card debt elimination, student loan repayment, and debt consolidation analysis. Take control of your finances.
18 toolsInvestment Calculators
Free investment calculators for compound interest, stock returns, ROI analysis, dividend yield, dollar-cost averaging, and CAGR. Plan your portfolio with confidence.
16 toolsBusiness Calculators
Free business calculators for profit margins, startup costs, revenue projections, SaaS metrics, break-even analysis, and freelance rate estimation.
17 tools