Six tools, one bigger picture
Sleep Calculator
Calculate optimal bedtime or wake time based on 90-minute sleep cycles. A gentle planning tool for waking during lighter sleep phases and improving morning alertness.
Sleep Debt Calculator
Track accumulated sleep debt by comparing your actual sleep to recommended targets. A reference for understanding how chronic sleep shortfall may affect energy, focus, and recovery.
Cholesterol Ratio Calculator
Calculate your total-to-HDL cholesterol ratio and other lipid ratios from standard blood test values. A reference metric used alongside full lipid panels for cardiovascular risk awareness.
Metabolic Age Calculator
Estimate your metabolic age by comparing your BMR to the average BMR for your chronological age group. A wellness orientation metric, not a clinical diagnostic.
Biological Age Calculator
Estimate your biological age based on lifestyle, activity, and health indicators. A holistic wellness reference that reflects how your habits may influence your body relative to your calendar age.
Blood Sugar Converter
Convert blood glucose values between mg/dL and mmol/L units. A simple reference tool for interpreting blood sugar readings across different measurement systems and regions.
Health markers, compared
Short reads for the health questions that come up most.
BMI vs Body Fat
Height-to-weight screening vs actual body composition. Which metric better tracks your health? BMI is quick, body fat percentage tells you more.
Read CompareIdeal Weight Formulas
Devine, Hamwi, Robinson, and Miller formulas compared side by side. Historical reference context and how to use them as reference ranges for health risk awareness.
ReadA health marker is a data point, not a diagnosis
Health risk calculators offer a reference estimate, not a medical assessment. Your actual health status depends on factors no single-metric calculator can capture — family history, lab results, lifestyle patterns, and professional clinical evaluation.
Use these tools to build awareness, not to self-diagnose. If a number raises questions, write it down and bring it to your healthcare provider. They have access to information no calculator can see — your full medical history, physical exam findings, and diagnostic tests that tell the complete story.