Micronutrient, nutrient density, and dietary analysis calculators. Browse our free nutrition tools below — all calculators are instant, accurate, and require no sign-up.
BMR Calculator — Calculate your Basal Metabolic Rate using Harris-Benedict, Mifflin-St Jeor, Katch-McArdle, and Cunningham equations. Estimate TDEE for weight goals.
Bicarbonate Deficit Calculator — Calculate bicarbonate deficit for metabolic acidosis correction. Estimates NaHCO₃ replacement dose based on body weight, current and target serum bicarbonate, and distribution volume.
Breastfeeding Calorie Calculator — Calculate daily calorie needs while breastfeeding. Accounts for milk production energy cost, activity level, and safe postpartum weight loss targets.
Calcium Intake Calculator — Calculate your daily calcium requirement based on age, sex, and health factors. Includes RDA targets, upper limits, food source tracker, and vitamin D synergy guidance.
Calorie Calculator — Estimate your daily calorie needs (BMR and TDEE) based on age, gender, height, weight, and activity level. Get targets for weight loss, maintenance, and muscle gain.
Carbohydrate Needs Calculator — Calculate your optimal daily carbohydrate intake based on body weight, activity level, and fitness goals. Includes meal distribution and food source reference.
Cholesterol Unit Converter — Convert cholesterol and triglyceride values between mg/dL and mmol/L. Full lipid panel conversion with risk assessment and reference ranges.
Carboplatin AUC Dosing Calculator — Calculate carboplatin dose using the Calvert formula with AUC targeting. Supports measured GFR or Cockcroft-Gault CrCl estimation with FDA GFR capping.
DKA Calculator — Diabetic ketoacidosis severity assessment and management calculator. Calculates anion gap, corrected sodium, osmolality, and provides insulin and fluid protocol guidance.
Daily Value Percentage Calculator — Calculate the percentage of Daily Value (%DV) for any nutrient based on FDA reference values. Customize for your calorie target.
Electrolyte Needs Calculator — Calculate your daily electrolyte needs for sodium, potassium, and magnesium based on activity level, sweat rate, climate, and diet. Prevent cramps and optimize performance.
Daily Fat Intake Calculator — Calculate your optimal daily fat intake by body weight and diet type. Includes saturated fat limits, omega-3 targets, and food source reference table.
Daily Fiber Intake Calculator — Calculate your recommended daily fiber intake by age, sex, and health goals. Includes soluble vs. insoluble targets and high-fiber food source reference.
Fiber Intake Calculator — Calculate your recommended daily fiber intake based on age, sex, and calorie consumption. Learn about soluble vs insoluble fiber with food source guidance.
Glycemic Load Calculator — Calculate the glycemic load of any food from its glycemic index and carb content. Understand real blood sugar impact with low, medium, and high GL thresholds.
Food Calorie Density Calculator — Calculate the calorie density (calories per gram) of any food. Compare foods by energy density and find high-satiety, low-calorie options for weight management.
Keto Macro Calculator — Calculate your ketogenic diet macros for fat, protein, and net carbs. Supports SKD, TKD, CKD, and high-protein keto protocols with personalized calorie targets.
Iron Intake Calculator — Calculate your daily iron requirement based on age, sex, diet type, and health factors. Includes RDA targets, vegetarian adjustments, and iron-rich food sources.
Macro Calculator — Calculate your optimal daily macronutrient split — protein, carbohydrates, and fat — based on your calorie target and diet type. Get grams and calories for each macro.
Maintenance Calorie Calculator — Calculate your exact maintenance calories using 4 BMR equations. Includes TDEE, macro breakdown, meal split, and calorie goals for cutting and bulking.
Meal Prep Portions Calculator — Calculate meal prep portions, macros per container, and grocery quantities. Scale recipes for any number of servings and days.
Metabolic Syndrome Risk Calculator — Assess metabolic syndrome risk using ATP III and IDF criteria. Enter waist, blood pressure, glucose, triglycerides, and HDL to check all 5 diagnostic criteria.
Micronutrient Gap Finder Calculator — Identify vitamin and mineral deficiencies by comparing your daily intake to RDA targets. Find gaps and get food source recommendations.
Micronutrient Daily Needs Calculator — Find your recommended daily intake for 17 essential vitamins and minerals. Adjusted by age, sex, pregnancy status, and diet type with food source references.
Omega-3 to Omega-6 Ratio Calculator — Calculate your omega-3 to omega-6 fatty acid ratio from dietary intake. Compare to the optimal 1:1–1:4 range and get actionable guidance on improving your ratio.
Nutrient Density Score Calculator — Calculate a nutrient density score for any food based on vitamins, minerals, and fiber per calorie. Compare foods using an ANDI-style scoring system.
Daily Protein Intake Calculator — Calculate your optimal daily protein intake based on weight, body fat, activity level, and goals. Includes per-meal targets, leucine thresholds, and food source reference.
Urine Protein-to-Creatinine Ratio Calculator — Calculate spot urine protein-to-creatinine ratio (PCR) and albumin-to-creatinine ratio (ACR). Classifies proteinuria severity and estimates 24-hour protein excretion.
Recipe Nutrition Scaler Calculator — Scale recipe ingredients and nutrition by serving multiplier. Adjust portions up or down while maintaining perfect macro ratios.
Simple Daily Calorie Intake Calculator — Calculate how many calories you need per day to lose, maintain, or gain weight. Simple interface with goal-based targets, macro breakdown, and food calorie reference.
Corrected Sodium Calculator for Hyperglycemia — Calculate corrected sodium for hyperglycemia using Katz (1.6) and Hillier (2.4) correction factors. Essential for DKA and HHS sodium assessment.
IV Fluid Sodium Change Calculator — Predict serum sodium change from IV fluid infusion using the Adrogue-Madias formula. Covers NS, hypertonic saline, D5W, LR, and custom fluids.
Sodium Correction Rate Calculator — Calculate sodium correction rate from serial labs. Checks against safe 24h/48h limits to prevent osmotic demyelination (ODS). Includes DDAVP rescue protocol.
Sodium Deficit Calculator — Calculate total sodium deficit in hyponatremia. Provides replacement volumes for 3% NaCl, normal saline, and oral NaCl tablets with a stepwise correction plan.
Sodium in Salt Converter — Convert between sodium and salt (NaCl). Compare salt types, check food sodium content against daily limits, and convert mg, mEq, mmol, and teaspoons.
Sodium Intake Calculator — Calculate your recommended daily sodium intake based on age, health status, and activity level. Includes AHA guidelines, athlete adjustments, and food sodium tracker.
Sugar Intake Calculator — Calculate your recommended daily sugar limit based on calorie intake using WHO and AHA guidelines. Convert between grams, teaspoons, and percent of calories.
Daily Vitamin & Mineral Needs Calculator — Find your recommended daily intake for 18 essential vitamins and minerals based on age, sex, pregnancy, and lactation. Includes upper limits and deficiency signs.
Vitamin D Needs Calculator — Calculate your daily vitamin D requirement based on age, sun exposure, latitude, skin tone, and health conditions. IOM and Endocrine Society guidelines supported.
Vitamin A Intake & Conversion Calculator — Convert vitamin A between IU, mcg RAE, and beta-carotene. Check intake against RDA and upper limits. Covers retinol, carotenoid sources, food content, and toxicity thresholds.
Water Intake Calculator — Calculate how much water you should drink daily based on body weight, activity level, and climate. Personalized hydration targets in liters, ounces, and cups.