ARVENRA tools
Health calculators
Calculators for body composition, energy, nutrition, performance and health. Every tool documents its formula and cites its sources.
28 tools, every one with a documented formula and cited sources
Body composition & weight
Body mass index, body fat, resting metabolism and healthy weight ranges.
Nutrition & energy
Daily calories and the split between protein, carbohydrate and fat.
Athletic performance
Pace, one-rep max and training heart-rate zones.
Pregnancy & reproductive health
Estimated due date, ovulation, cycle timing and gestational weight gain.
Medical tools
Kidney function estimate and blood alcohol concentration — educational only.
28 tools
Body composition & weight
BMI Calculator
Weight relative to height squared, with the World Health Organization classification.
CalculateCalorie Calculator
Maintenance calories and a target for losing or gaining weight.
CalculateBody Fat Calculator
Body fat estimated from body circumferences, using the US Navy method.
CalculateBMR Calculator
The calories your body burns at complete rest.
CalculateIdeal Weight Calculator
Four classical clinical formulas, shown side by side.
CalculateArmy Body Fat Calculator
Circumference body fat alongside the AR 600-9 maximum allowable standard.
CalculateLean Body Mass Calculator
Your body weight minus fat, estimated with three prediction formulas.
CalculateHealthy Weight Calculator
The weight range matching a body mass index of 18.5 to 24.9 for your height.
CalculateCalories Burned Calculator
The energy cost of an activity, from its intensity and duration.
CalculateTDEE Calculator
The total calories you burn in a typical day.
CalculateBody Type Calculator
Body shape classification from bust, waist and hip proportions.
CalculateBody Surface Area Calculator
Total body surface area, with five standard clinical formulas.
Calculate
Nutrition & energy
Macro Calculator
Splitting your daily calories between protein, carbohydrate and fat.
CalculateCarbohydrate Calculator
Daily carbohydrate from your calories and chosen share of energy.
CalculateProtein Calculator
Daily protein in grams and per kilogram of body weight.
CalculateFat Intake Calculator
Daily fat, together with the recommended saturated fat ceiling.
Calculate
Athletic performance
Pregnancy & reproductive health
Pregnancy Calculator
Gestational week, trimester and days remaining.
ImportantCalculatePregnancy Weight Gain Calculator
The recommended gain range from the IOM guidelines and your pre-pregnancy BMI.
ImportantCalculatePregnancy Conception Calculator
The estimated conception window from your current pregnancy dates.
ImportantCalculateDue Date Calculator
Your estimated due date and pregnancy milestones, using Naegele's rule.
ImportantCalculateOvulation Calculator
Estimated ovulation and the fertile window across upcoming cycles.
ImportantCalculateConception Calculator
Estimated conception, worked back from a due date.
ImportantCalculatePeriod Calculator
Projected start and end dates for upcoming periods.
ImportantCalculate