Tools
Eight tools for nutrition planning and health screening. Use the calculators for estimates and the ADAM questionnaire for symptom screening, not diagnosis.
Eight tools for nutrition planning and health screening. Use the calculators for estimates and the ADAM questionnaire for its published screening rule.
Calculator results depend on the method, its assumptions and your inputs. The ADAM questionnaire screens symptoms; it does not measure testosterone, give your probability of low testosterone or make a diagnosis. Read each tool's limitations before deciding what to do next.
All guides in this hub
Creatine Dose Calculator: How Much to Take
Compare the fixed 3–5 g/day protocol with optional weight-based loading arithmetic. For generally healthy adults; this tool does not determine a personal safe dose. No sign-up needed.
Low Testosterone Symptom Checker (ADAM Questionnaire)
Ten explicit yes-or-no ADAM screening questions, with published scoring, evidence limits and blood-test next steps. Answers stay in your browser.
Legacy Navy Body Fat Calculator for Men
Estimate male body fat with the legacy Hodgdon-Beckett tape equation. See its study limits and why it is not the Navy’s current BCA.
Waist-to-Height Ratio Calculator for Men
Estimate central adiposity from waist and height using NICE bands for adults with BMI below 35. Use the result alongside BMI, not as a diagnosis. Calculator code processes entries locally; site analytics are separate.
Water Intake Calculator for Men
Compare EFSA and US National Academies total-water references for adult men, and convert liters, US fluid ounces and cups. This tool does not calculate a personal drinking target.
Calorie Calculator for Men (BMR & TDEE)
Estimate resting energy and daily expenditure for men aged 19–78. Calculator entries stay in this page; separate site analytics may use browser storage.
BMI Calculator for Men
Adult BMI calculator for ages 20+, with CDC categories, NICE guidance, limitations and next steps. Measurements are processed in your browser; site analytics are separate.
Protein Calculator for Men: Daily Target
Protein calculator for men aged 19+: daily grams by weight and training band. Entries stay in the calculator; separate site analytics may use storage.
Where to start
- Protein calculator Start here if you are changing how you eat. It gives a daily range from the same evidence as the protein guide.
- Calorie calculator Estimate resting energy with Mifflin-St Jeor, then apply an activity factor for a starting maintenance estimate. Compare it with your weight trend over several weeks.
- Waist-to-height ratio Divide waist circumference by height in the same units. The ratio supports central adiposity screening; it does not directly measure body-fat percentage.
NICE guidance on adult waist-to-height ratio recommends using it alongside BMI in adults with a BMI below 35 to help assess central adiposity and related health risks.
What this hub answers
- How accurate are these tools?
- Accuracy varies by method, population and inputs. Calorie estimates add activity assumptions to estimated resting energy; circumference-based body-fat estimates are not direct measurements. ADAM applies a symptom-screening rule, not a hormone measurement or a personal probability of low testosterone. See each tool's assumptions and limitations.
- Do I need to sign up?
- No sign-up is required to use these tools. For information about site analytics, cookies and data handling, read our privacy policy.
- Which number is most useful?
- It depends on your question. Waist-to-height ratio supports central adiposity screening, while calorie and protein estimates help with nutrition planning. No single result is best for every purpose, and none of these tools makes a diagnosis. Discuss persistent symptoms or concerning results with a clinician.