# CalcuNexa
> CalcuNexa (calcunexa.com) provides 29 free online calculators for health, body measurements, nutrition, family planning, money and loans. Every calculator is free, needs no sign-up, and runs in the browser. Each calculator page explains the formula it uses, shows a worked example, and answers common questions.
## Calorie & Weight
- [Calorie Calculator](https://calcunexa.com/calorie-calculator/): Daily calorie needs from age, weight, height, activity level and goal.
- [BMR Calculator](https://calcunexa.com/bmr-calculator/): Basal metabolic rate, the calories your body burns at rest (Mifflin-St Jeor equation).
- [TDEE Calculator](https://calcunexa.com/tdee-calculator/): Total daily energy expenditure from BMR and activity level.
- [Macro Calculator](https://calcunexa.com/macro-calculator/): Daily protein, carbohydrate and fat targets for your goal.
- [Weight Loss Calculator](https://calcunexa.com/weight-loss-calculator/): Calorie deficit and time needed to reach a target weight.
- [Ideal Weight Calculator](https://calcunexa.com/ideal-weight-calculator/): Healthy weight range for your height.
- [Calories Burned Calculator](https://calcunexa.com/calories-burned-calculator/): Calories burned during common activities, by duration and body weight.
## Body & Fitness
- [Body Fat Calculator](https://calcunexa.com/body-fat-calculator/): Body fat percentage from body measurements (US Navy method).
- [Lean Body Mass Calculator](https://calcunexa.com/lean-body-mass-calculator/): Lean body mass from height and weight.
- [Waist to Hip Ratio Calculator](https://calcunexa.com/waist-to-hip-ratio-calculator/): Waist-to-hip ratio and its health risk category.
- [BMI Calculator](https://calcunexa.com/bmi-calculator/): Body mass index and weight category for adults.
- [Heart Rate Zone Calculator](https://calcunexa.com/heart-rate-zone-calculator/): Heart rate training zones using the Karvonen method.
- [One Rep Max Calculator](https://calcunexa.com/one-rep-max-calculator/): Estimated one-rep max from weight lifted and repetitions.
- [VO2 Max Calculator](https://calcunexa.com/vo2-max-calculator/): Aerobic fitness estimate from running performance.
- [Sleep Calculator](https://calcunexa.com/sleep-calculator/): Bedtimes and wake-up times based on 90-minute sleep cycles.
- [Pace Calculator](https://calcunexa.com/pace-calculator/): Running pace, finish time predictions and split tables for any distance.
## Nutrition & Family
- [Protein Intake Calculator](https://calcunexa.com/protein-intake-calculator/): Daily protein target by body weight, activity and goal.
- [Water Intake Calculator](https://calcunexa.com/water-intake-calculator/): Daily water needs by weight, activity and climate.
- [Pregnancy Due Date Calculator](https://calcunexa.com/pregnancy-due-date-calculator/): Estimated due date from last period or conception date.
- [Ovulation Calculator](https://calcunexa.com/ovulation-calculator/): Fertile window and ovulation day from cycle dates.
- [Pregnancy Weight Gain Calculator](https://calcunexa.com/pregnancy-weight-gain-calculator/): Recommended weight gain range by week and pre-pregnancy BMI.
- [BMI Calculator for Kids](https://calcunexa.com/bmi-calculator-for-kids/): Child and teen BMI percentile using CDC growth charts.
- [Age Calculator](https://calcunexa.com/age-calculator/): Exact age in years, months and days from a date of birth.
- [Period Calculator](https://calcunexa.com/period-calculator/): Next period, ovulation and fertile days, with a full-year planner.
## Money & Loans
- [Loan Calculator](https://calcunexa.com/loan-calculator/): Monthly payment, total interest and full amortization schedule.
- [Mortgage Calculator](https://calcunexa.com/mortgage-calculator/): Mortgage payments including taxes, insurance and PMI.
- [Compound Interest Calculator](https://calcunexa.com/compound-interest-calculator/): Investment growth with compound interest and monthly contributions.
- [Refinance Calculator](https://calcunexa.com/refinance-calculator/): New payment, monthly savings and break-even point when refinancing a loan.
- [Salary Calculator](https://calcunexa.com/salary-calculator/): Take-home pay with 2026 tax rules for the US, UK, Germany, India, Pakistan, Australia, Canada, Japan, China and the UAE.
## About
- [About Us](https://calcunexa.com/about-us/)
- [Contact Us](https://calcunexa.com/contact-us/)
- [Privacy Policy](https://calcunexa.com/privacy-policy/)