Work out your bra size from your underbust and bust measurements, with UK, US, EU, French, Italian and Australian sizes and sister sizes.
NewFeaturedUse this tool
Category
Health & wellness
Estimate body and energy reference values with health and wellness calculators that clearly explain their methods, sources and limitations.
12 tools available · 3 subcategories · 12 embeddable widgets
All toolsBody measurements 8
Calculate sizes and body references from simple measurements, with explicit methods and limitations.
Calculate your body mass index from height and weight, with adult reference ranges and clearly explained limitations.
NewFeaturedUse this tool
Find your ideal weight for your height: healthy BMI range and the Devine, Robinson, Miller, Hamwi, Lorentz, Broca, Creff and Monnerot-Dumaine formulas.
NewFeaturedUse this tool
Calculate your waist-to-hip ratio, place your waist size on the WHO cut-offs and, with your height, get the waist-to-height ratio recommended by NICE.
NewUse this tool
Estimate your body fat percentage with the U.S. Navy method from body measurements, then see your fat mass and lean body mass.
NewUse this tool
Calculate body surface area in m² from height and weight, with the Mosteller, Du Bois, Haycock, Gehan-George and Boyd formulas.
NewUse this tool
Estimate lean body mass with Boer, James and Hume, with an optional comparison from a known body-fat percentage.
NewUse this tool
Calculate FFMI, height-normalized FFMI and FMI from height, weight and body-fat percentage.
NewUse this tool
Energy & metabolism 2
Estimate basal metabolism and daily energy expenditure with explicit methods and limitations.
Estimate your basal metabolic rate in kcal and kJ, and compare the Mifflin-St Jeor, Harris-Benedict and Katch-McArdle equations.
NewFeaturedUse this tool
Estimate your total daily energy expenditure from your activity, compare the five levels and get guideline intakes for each weight goal.
NewFeaturedUse this tool
Cardio & training 2
Estimate maximal heart rate and exercise zones with explicit methods and limitations.
Calculate your maximum heart rate (Tanaka, 220 − age, Gulati) and your five training zones, with the Karvonen method if you know your resting heart rate.
NewFeaturedUse this tool
Calculate your running pace, finish time or distance, predict race times from 5K to marathon and get your split times, in miles or kilometres.
NewUse this tool
Why this category?
Why use health & wellness tools?
Common health indicators are most useful when treated as estimates rather than diagnoses. Bethemesh uses documented formulas, suitable units and explicit limitations so each result can be interpreted in the right context.
Calculations run locally in your browser. Results are informational reference values and do not replace a diagnosis, medical consultation or personalized recommendations from a qualified healthcare professional.
Use cases
Understand a body indicator
Calculate values such as BMI from simple measurements with the method and assumptions clearly explained.
Estimate energy expenditure
Estimate basal metabolic rate and total daily energy expenditure using documented equations and activity factors.
Work with familiar units
Use metric or imperial measurements according to your habits while the calculator handles required conversions.
All these tools are also available as widgets
Add tools from this category to WordPress, Webflow, Wix, or any HTML page with the same local processing.
Frequently asked questions
Are these results medical advice?
No. They are informational estimates and do not replace advice, diagnosis or treatment from a qualified healthcare professional.
Are my health measurements sent to Bethemesh?
No. The calculations in these tools are performed locally in your browser and do not require sending your measurements to a server.
Why can results differ from another method?
Equations, conventions and assumptions vary between methods. Each calculator identifies the method it uses and its main limitations.