calcolatore.online
ESIT

Calculate everything simply,
for free, and accurately.

190+ free calculators with verified formulas from official sources. Health, pregnancy, math, cooking, sports, and more.

Explore categories

🤰Pregnancy👶Children💪Health🚗Automotive⚡Energy📈Investing🎓Education✨Astrology🔢Math🍳Cooking🏃Sports🔧Utilities🐾Pets

Most popular calculators

🔧
Age Calculator

Calculate your exact age in years, months, and days from your date of birth. Also find out how many days until your next birthday.

💪
BMI Calculator (Body Mass Index)

Calculate your Body Mass Index (BMI) and find out if your weight is within the healthy range according to WHO standards.

📈
Compound Interest Calculator

Calculate the final amount of your investment with compound interest, periodic contributions, and percentage return.

💪
Daily Calorie Calculator

Calculate your daily calorie needs using the Mifflin-St Jeor formula, based on sex, age, weight, height, and activity level.

🔧
Discount Calculator

Calculate the discounted price and savings in dollars from the original price and discount percentage.

🤰
Due Date Calculator

Calculate your estimated due date using Naegele's rule based on your last menstrual period and cycle length.

🚗
Car Leasing Calculator -- Monthly Payment

Calculate the monthly car lease payment with down payment, residual value, APR, and effective annual rate.

🤰
Ovulation Date Calculator

Calculate your ovulation date and fertile window from your last menstrual period.

💰
Percentage Calculator

Calculate percentages easily: percentage of a number, percentage change, add or subtract a percentage.

🤰
Pregnancy Weeks Calculator

Find out what week of pregnancy you are in, which trimester, and your estimated due date.

👶 Children(11)

Baby Formula Calculator
Calculate how much formula your baby needs based on weight and age. Get ml per feeding, number of feedings, and daily total.
Baby Age in Weeks & Months Calculator
Calculate your baby's exact age in weeks, months, and days from their date of birth. Discover the next developmental milestone.
Child & Adolescent BMI Calculator
Calculate your child's BMI (ages 2-18) with WHO/CDC percentiles. Check if their weight is normal for their age and sex.
Child Growth Percentile Calculator (0-18 Years)
Calculate your child's weight and height growth percentiles (0-18 years) using WHO and CDC data. Check if growth is on track for age and sex.
Child Adult Height Predictor
Estimate your child's adult height using the Tanner Mid-Parental Height method. Optionally refine with current child measurements.
Child Sleep Calculator by Age
Check if your child is getting enough sleep with AAP and NSF recommendations by age. Personalized assessment and suggested bedtime.
Diaper Calculator: How Many You Need & Total Cost
Calculate how many diapers you'll need until potty training and the total cost. Recommended size, daily usage, and estimated expenses.
Head Circumference Percentile Calculator (0-5 Years)
Calculate your baby's head circumference percentile (0-5 years) using official WHO data. Check if cranial development is on track.
Expected Newborn Birth Weight Calculator
Estimate your baby's birth weight based on gestational week, sex, maternal BMI, and risk factors. Based on Intergrowth-21st data.
Corrected Age Calculator for Premature Babies
Calculate your premature baby's corrected age. Understand the difference between chronological and corrected age and how long to apply the correction.
Weaning & Complementary Feeding Calculator
Discover your baby's weaning stage, recommended foods for their age, and what to avoid. Based on WHO and AAP guidelines.

💪 Health(30)

Alcohol Calorie Calculator
Calculate how many calories your alcoholic drink contains. Beer, wine, cocktails, spirits: find the real caloric intake per serving.
Basal Metabolic Rate Calculator (BMR)
Calculate your basal metabolic rate using the Harris-Benedict and Mifflin-St Jeor equations. Find out how many calories you burn at rest.
Biological Age Calculator
Estimate your biological age compared to your chronological age based on lifestyle: exercise, diet, sleep, stress, and habits.
Blood Alcohol Calculator (BAC)
Calculate your estimated blood alcohol content using the Widmark formula. Check if you are within the legal driving limit.
Blood Pressure Calculator
Interpret blood pressure values according to ESC/ESH 2023 guidelines. Classification, mean arterial pressure, pulse pressure, and risk level.
BMI Calculator (Body Mass Index)
Calculate your Body Mass Index (BMI) and find out if your weight is within the healthy range according to WHO standards.
Body Fat Percentage Calculator (US Navy Method)
Calculate your body fat percentage using the US Navy method. Get fat mass, lean mass, and body composition classification.
Daily Caffeine Limit Calculator
Calculate your daily caffeine intake and check if you exceed the EFSA recommended limit of 400 mg. Compare espresso, drip coffee, tea, and more.
Calorie Deficit Calculator
Calculate the calorie deficit needed to reach your goal weight safely. Estimates daily calories, weight loss rate, and realistic timelines.
Cardiovascular Risk Calculator
Estimate your 10-year cardiovascular risk based on age, blood pressure, cholesterol, and risk factors.
Daily Calorie Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor formula, based on sex, age, weight, height, and activity level.
Glycemic Load Calculator
Calculate the glycemic load of a food based on its glycemic index and carbohydrates per serving. Low/medium/high classification.
Healthy Weight Calculator with 5 Formulas
Calculate your healthy weight using Lorenz, Broca, Keys, Perrault formulas. Average of all formulas and BMI range.
Heart Rate Zones Calculator
Calculate your maximum heart rate and training zones using the Karvonen formula. Fat burning, aerobic, cardio, and anaerobic zones.
Daily Water Intake Calculator
Calculate how much water to drink per day based on weight, activity level, and climate. Results in liters and glasses.
Ideal Weight Calculator
Calculate your ideal weight using the Lorenz, Broca, and Van der Vael formulas, plus the BMI normal range for your height and sex.
Macronutrient Calculator
Calculate your daily split of protein, carbs, and fats based on your goal (maintenance, weight loss, or muscle gain). Mifflin-St Jeor + ISSN guidelines.
Maximum Heart Rate Calculator
Calculate your max heart rate with classic (220-age), Tanaka, and Gulati formulas. Compare the results of all 3 formulas.
Menstrual Cycle Calculator
Predict your next period date, fertile window, and ovulation day based on your average cycle length.
Daily Protein Needs Calculator
Calculate how much protein you need per day based on weight, activity level, and goals. Grams per meal and calories from protein.
Running Calorie Calculator
Calculate calories burned running based on weight, distance, and speed. Based on official MET values from the Compendium of Physical Activities.
Sleep Apnea Risk Calculator (STOP-Bang)
Assess your risk of obstructive sleep apnea (OSA) with the scientifically validated STOP-Bang questionnaire.
Sleep Cycle Calculator
Calculate ideal bedtime or wake time based on 90-minute sleep cycles. Waking at the end of a cycle helps you feel rested.
Sport Calorie Calculator
Calculate how many calories you burn practicing your favorite sport based on weight, duration, and weekly frequency.
Swimming Calorie Calculator
Calculate calories burned swimming based on weight, duration, stroke, and intensity. Based on official MET values from the Compendium of Physical Activities.
Visceral Fat Level Calculator
Estimate your visceral fat level based on waist, weight, height, age, and sex. Risk classification and associated BMI.
Vision & Diopter Calculator
Convert between diopters and visual acuity (20/20 scale) with visual defect classification and clinical interpretation.
Vitamin D Requirement Calculator
Calculate the recommended daily dosage of vitamin D based on age, weight, current level, and sun exposure. Based on EFSA and Endocrine Society guidelines.
Waist-to-Hip Ratio Calculator (WHR)
Calculate your waist-to-hip ratio (WHR) and associated cardiovascular risk according to WHO parameters.
Walking Calorie Calculator
Calculate how many calories you burn walking based on weight, distance, and speed. Based on official MET values.

✨ Astrology(19)

Ascendant (Rising Sign) Calculator
Calculate your zodiac ascendant based on date, time, and place of birth. Discover which sign was rising on the horizon at the moment of your birth.
Biorhythm Calculator
Calculate your physical, emotional, and intellectual biorhythms. Discover the cycles that influence energy, mood, and concentration.
Birth Chart Calculator
Calculate your complete birth chart with precise planetary positions: sun sign, moon sign, ascendant, Mercury, Venus, and all planets.
Birth Moon Phase Calculator
Discover which moon phase you were born under. The Moon phase at birth reveals your inner rhythm and life purpose.
Chinese Zodiac Sign Calculator
Discover your Chinese zodiac sign and element. 12 animals and 5 elements create 60 unique combinations.
Descendant Calculator
Discover your Descendant sign. Opposite to the Ascendant, it reveals what you seek in a partner and how you behave in significant relationships.
Dominant Element Calculator
Discover which element dominates your natal chart: Fire, Earth, Air, or Water. The dominant element reveals your fundamental energy.
Jupiter Sign Calculator
Discover which zodiac sign your Jupiter is in. The planet of fortune reveals your opportunities for growth and abundance.
Mars Sign Calculator
Discover which zodiac sign your Mars is in. The planet of energy reveals how you act, compete, and express passion.
Mercury Sign Calculator
Discover which zodiac sign your Mercury is in. The planet of communication reveals how you think, speak, and learn.
Midheaven (MC) Calculator
Discover your Midheaven. The highest point of the natal chart reveals your professional vocation and public image.
Moon Sign Calculator
Discover your Moon sign with date, time, and place of birth. The Moon reveals your emotional world and inner sensitivity.
Name Numerology Calculator
Calculate the destiny number from your full name. Discover the numerological meaning of your identity according to Pythagorean numerology.
Complete Natal Chart Calculator
Calculate your complete natal chart with precise planetary positions: Sun sign, Moon sign, Ascendant, Mercury, Venus, Mars, Jupiter, Saturn, and Midheaven.
Neptune Sign Calculator
Discover which zodiac sign your Neptune is in. The planet of spirituality reveals your intuition, dreams, and creativity.
Saturn Sign Calculator
Discover which zodiac sign your Saturn is in. The planet of discipline reveals your challenges, limits, and path to maturity.
Uranus Sign Calculator
Discover which zodiac sign your Uranus is in. The planet of change reveals your rebellious spirit and originality.
Venus Sign Calculator
Discover which zodiac sign your Venus is in. The planet of love reveals your affective style and what you seek in relationships.
Zodiac Compatibility Calculator
Discover the zodiac compatibility between two people. Calculate astrological affinity based on sun signs.

🔢 Math(21)

Circle Area Calculator
Calculate the area, circumference, and diameter of a circle given the radius. Formula: A = pi * r^2.
Combinations and Permutations Calculator
Calculate permutations, arrangements, and combinations (simple and with repetition). Formula, result, and step-by-step explanation.
Cylinder Volume Calculator
Calculate volume, lateral surface area, and total surface area of a cylinder. Formula: V = pi*r²*h.
Exponents Calculator
Calculate the power of a number (base^exponent). Result in decimal and scientific notation.
Fractions Calculator Online
Add, subtract, multiply, and divide fractions. Result automatically simplified to lowest terms.
Geometric Mean Calculator
Calculate the geometric, arithmetic, and harmonic mean of a series of numbers. Comparison of the three means with AM-GM inequality explanation.
LCM and GCD Calculator
Calculate the Least Common Multiple (LCM) and Greatest Common Divisor (GCD) of two or three integers.
Logarithm Calculator
Calculate the logarithm of a number in any base. Also shows natural log (ln), log base 10, and log base 2.
Mean, Median, and Mode Calculator
Calculate arithmetic mean, median, and mode of a set of values. Enter numbers separated by commas.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Shows all representations and conversion steps.
Regular Polygon Area Calculator
Calculate area, perimeter, apothem, and radii of any regular polygon: equilateral triangle, square, pentagon, hexagon up to 20 sides.
Proportions Calculator
Solve proportions A:B = C:D by finding the unknown term. Enter three values and get the fourth.
Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using the Pythagorean theorem. Legs and hypotenuse.
Quadratic Equation Calculator
Solve quadratic equations ax² + bx + c = 0. Calculate discriminant, real and complex solutions.
Rectangle Area Calculator
Calculate area, perimeter, and diagonal of a rectangle from base and height.
Roman Numeral Converter
Convert Arabic numerals to Roman numerals and vice versa. Supports values from 1 to 3999.
Scientific Calculator Online
Perform mathematical operations: addition, subtraction, multiplication, division, exponents, roots, and percentages.
Square Root Calculator
Calculate the square root and cube root of a number. Check if it is a perfect square.
Standard Deviation Calculator
Calculate standard deviation, variance, mean, median, and coefficient of variation for a data set. Supports population and sample.
Trapezoid Area Calculator
Calculate the area of a trapezoid with the formula (Base1 + Base2) x Height / 2.
Triangle Calculator
Calculate perimeter, area (Heron's formula), and type of a triangle given three sides.

🍳 Cooking(14)

Cooking Time Calculator
Calculate ideal cooking time based on food type, weight, and method. Chicken, beef, pork, fish, pasta, rice, legumes, and bread.
Cups to Grams Converter
Convert grams to cups and back for any ingredient. Specific densities for flour, sugar, butter, rice, milk, oil, and water.
Dough Rising Calculator
Calculate the right amount of yeast and rising time based on flour, yeast type, and ambient temperature.
Drink Calorie Calculator
Calculate calories in drinks and cocktails: espresso, cappuccino, spritz, mojito, beer, wine, and more. With pizza comparison and burn time.
Egg Timer Calculator
Calculate the perfect cooking time for soft-boiled, medium, or hard-boiled eggs. Considers size and starting temperature.
Food Storage Guide
Find out how long to store meat, fish, dairy, fruit, vegetables, and leftovers in the refrigerator, freezer, or at room temperature.
Ingredient Substitution Calculator
Find the ideal substitute for butter, eggs, milk, flour, sugar, and other ingredients. With exact quantities and recipe impact notes.
Oven Temperature Converter
Convert oven temperatures between Celsius, Fahrenheit, and Gas Mark. Essential for following international recipes.
Pasta Per Person Calculator
Calculate the right amount of pasta per person based on shape, sauce, and whether it is a side or main dish.
Pizza Dough Calculator
Calculate exact ingredients for homemade pizza dough. Flour, water, yeast, salt, and oil for any number of pizzas.
Recipe Calorie Calculator
Calculate calories per serving and per 100 g of a recipe. Enter total calories, number of servings, and total weight.
Recipe Scaler Calculator
Recalculate recipe quantities for a different number of servings. Enter original and desired servings to get the scaling factor.
Serving Size Calculator
Calculate the right amount of food per person based on food type, number of guests, and meal type.
Tablespoons to Grams Converter
Convert tablespoons and teaspoons to grams for any ingredient. Flour, sugar, salt, oil, butter, and baking powder.

🔧 Utilities(40)

Age Calculator
Calculate your exact age in years, months, and days from your date of birth. Also find out how many days until your next birthday.
Area Converter
Convert between m², cm², km², hectares, acres, square feet, square yards, and square miles.
Baby Name Popularity
Discover how popular a name is: ranking position, trend over the years, and etymological meaning.
Bill Splitter
Split the restaurant bill among diners, with optional tip. Per-person share calculated in a second.
Bra Size Calculator
Calculate your bra size by measuring your underbust and bust. Italian and European size conversion.
Carbon Footprint Calculator
Estimate your annual carbon footprint in tonnes of CO2 and compare it with national and global averages.
How Much Does a Child Cost?
Estimate the cost of raising a child from birth to age 18, with a breakdown by age group, childcare, school type, and region.
Clothing Size Converter
Convert clothing sizes between Italian, European, US, and UK systems. For men and women.
Coffee Savings Calculator
Calculate how much you save making coffee at home instead of buying it at a coffee shop. In 10 years, the numbers are surprising.
Countdown Calculator
Calculate how many days, weeks, and months remain until a future event. Precise countdown from today.
Currency Converter -- Live ECB Rates
Convert between major currencies with ECB exchange rates updated automatically every day. Euro, dollar, pound, Swiss franc, and yen.
Data Unit Converter
Convert between data units: bit, byte, KB, MB, GB, TB, PB and binary equivalents KiB, MiB, GiB, TiB. SI and IEC standards.
Day of the Week Calculator
Find out what day of the week any date falls on. Also shows day of year, ISO week number, and leap year status.
Days Between Dates Calculator
Calculate the exact number of days, weeks, months, and hours between any two dates. Accurate and free.
Discount Calculator
Calculate the discounted price and savings in dollars from the original price and discount percentage.
Elf Name Generator
Transform your first and last name into an elegant elvish name with a deterministic algorithm inspired by Tolkien's Sindarin.
Energy Converter
Convert between energy units: Joule, kJ, calorie, kcal, kWh, Wh, BTU, and electronvolt. Complete converter with all equivalences.
Flow Rate Converter
Convert between L/min, cm3/h, m3/h, mL/min, gal/min (GPM), ft3/min (CFM), and other flow rate units. Online flow converter.
Hours Worked Calculator
Calculate daily hours worked from start time, end time, and lunch break. Result in hours, minutes, and decimal format.
Length Converter
Convert between mm, cm, m, km, inches, feet, yards, miles, and nautical miles. Online length and distance converter.
Moving Cost Calculator
Estimate the cost of a move based on home size, floor, distance, service type, and time of year. Includes movers, truck type, and duration.
Name Compatibility Calculator
Discover the compatibility percentage between two names with a fun, deterministic algorithm based on shared letters and vowel harmony.
Secure Password Generator
Generate a secure random password. Customize length, uppercase, numbers, and symbols. Entropy and security level calculation.
Which Pizza Is a Better Deal?
Compare the value of two pizzas: calculate the cost per square inch and discover which one gives you more pizza for your money.
Pressure Converter
Convert between pressure units: bar, atm, psi, mmHg, Pascal, kPa, hPa (mbar). Complete converter with all equivalences.
Reading Time Calculator
Calculate how long it takes to read a book or text: enter the number of pages and reading speed for a precise estimate.
Ring Size Calculator
Find your ring size from the inner diameter or finger circumference. Italian, US, and UK sizes.
Salary Per Minute Calculator
Find out how much you earn per minute, per second, and how long you work to buy a coffee.
How Many Seconds Have You Been Alive?
Calculate how many seconds, heartbeats, breaths, and blinks you have accumulated since birth.
Shoe Size Converter
Calculate your shoe size in EU, US, and UK from foot length in centimeters. Men and women sizes.
Smoking Cost Calculator
Find out how much smoking costs you: daily, monthly, yearly, and lifetime spending. See how many cigarettes you have smoked.
Speed Converter
Convert between speed units: km/h, mph, m/s, knots, ft/s, and Mach. Complete converter with all equivalences.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin. Online temperature converter with formulas and conversion table.
Time Converter
Convert between time units: seconds, minutes, hours, days, weeks, months, years, milliseconds, and microseconds.
Time Zone Calculator
Calculate the time difference between two cities worldwide. Find out what time it is in another city.
Unit Converter
Convert between units of measurement: kilometers, miles, meters, feet, kilograms, pounds, liters, gallons, Celsius and Fahrenheit.
Volume Converter
Convert between ml, cl, dl, liters, cubic meters, fl oz US/UK, gallons US/UK, US pints, and US cups. Online volume and capacity converter.
Wedding Cost Calculator
Estimate the cost of your wedding based on guest count, region, and style. Detailed breakdown for every expense category.
Week of the Year Calculator
Calculate the ISO 8601 week number, day of the year, remaining days, and leap year status.
Weight Converter
Convert between kg, grams, pounds, ounces, stone, milligrams, quintals, and tonnes. Online weight and mass converter.
190+calculators
100%free
0registration
2026updated data