Food & Nutrition Calculators
Science-backed tools for meal timing, calorie needs, macros, and smarter eating decisions — personalised to your schedule and goals.
Food and nutrition calculators that help you make smarter eating decisions based on science, not diet culture. Tools in this category cover personalised meal timing based on circadian rhythm research, calorie needs (TDEE), macronutrient ratios, and portion guidance. Every tool is grounded in chrono-nutrition and sports nutrition research.
Popular Food & Nutrition Calculators
All Food & Nutrition Tools
10 carefully crafted calculators and tools to help you with food & nutrition
Alcohol Units Calculator
Work out how many alcohol units are in your drinks. Enter the drink type and number, and get UK units, grams of pure alcohol, and US standard drinks for beer, wine, and spirits.
Caffeine Calculator
Track your daily caffeine intake from coffee, tea, cola, energy drinks and more, and see how it compares with the general safe limit. Estimates when caffeine clears your system.
Cooking Measurement Converter
Convert cooking measurements between cups, tablespoons, teaspoons, millilitres, grams, and ounces — adjusted for the ingredient, since flour, sugar, and butter all weigh differently.
Intermittent Fasting Calculator
Plan your intermittent fasting schedule. Pick a method like 16:8, 18:6, or 20:4, set when your eating window starts, and get your exact eating and fasting times.
Macro Calculator
Convert a daily calorie target into grams of protein, carbohydrate, and fat for popular diet splits — balanced, low-carb, high-carb, keto, and high-protein.
Today's Meal Timing Calculator
Get your personalised eating schedule based on your wake time and health goal. Science-backed circadian nutrition — the what matters far less than the when.
Protein Intake Calculator
Calculate your daily protein target in grams based on your body weight and goal — general health, muscle building, fat loss, or endurance training. Shows the range and calorie contribution.
Recipe Scaler
Scale a recipe to any number of servings. Enter the original and new serving counts, list your ingredients, and get every amount recalculated instantly.
TDEE Calculator
Calculate your total daily energy expenditure (TDEE) — how many calories you burn each day including activity — from your age, sex, height, weight, and activity level. Shows maintenance, weight-loss, and weight-gain targets.
Water Intake Calculator
Estimate your daily water target in litres and cups from your body weight, exercise time, and climate. A practical guide for staying properly hydrated.
When you eat matters as much as what you eat. CalcPool's nutrition tools go beyond generic calorie counts — our Meal Timing Calculator generates a personalised eating schedule aligned to your circadian rhythm, alongside TDEE, macro, protein, hydration, caffeine, and intermittent-fasting tools. All are grounded in peer-reviewed nutrition research and run entirely in your browser.
Why Use CalcPool Nutrition Tools?
Circadian rhythm-based
Our Meal Timing Calculator is based on chrono-nutrition research showing that eating in alignment with your body's internal clock improves metabolic health, energy levels, and sleep quality.
Personalised schedules
Results are based on your specific wake time, sleep time, and health goal — not a generic population average. Your meal schedule is yours, not a template.
One place for the numbers
From daily calories and macros to hydration, caffeine, and fasting windows, the category covers the numbers most people need to plan their eating — free, instant, and with no signup.
Frequently Asked Questions
Common questions about food & nutrition calculators and tools
Q.What is the Meal Timing Calculator based on?
The Meal Timing Calculator is based on chrono-nutrition research, specifically studies on circadian rhythm and metabolic timing (Sutton et al., 2018; Jakubowicz et al., 2013). It uses your wake time to calculate optimal windows for breakfast, lunch, dinner, and snacks.
Q.Is the meal timing advice different for different goals?
Yes. The calculator adjusts meal window timing based on your selected goal: weight loss (earlier eating window, 12-hour fast), muscle gain (protein distribution across 4-5 meals), energy optimisation (front-loaded calories), or general health (balanced 3-meal structure).
Q.What nutrition tools does CalcPool have?
CalcPool's nutrition category includes 10 tools: TDEE (calorie needs), macro ratio, protein intake, water intake, recipe scaler, alcohol units, caffeine, intermittent fasting, cooking measurement converter, and meal timing.
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