Безкоштовні Онлайн Калькулятори
Fast, accurate calculators for every need. No signup required — just run the numbers.
⭐ Популярні Калькулятори
🏃 Running
Easy Run Pace Calculator
Calculate your recovery and easy run pace from a recent race result. Ensure you're training at the …
Elevation Gain Adjustment Calculator – Hill Running Pace Adjuster
Adjust your running pace for elevation gain and hills. Uses Minetti's energy cost equations to …
Half Marathon Pace Calculator – 13.1 Mile Split Planner
Calculate your required half marathon pace for any goal finish time. Get per-km, per-mile pace and …
Heart Rate Drift Calculator
Estimate cardiac drift during long runs. Calculate how much your heart rate rises at the same pace …
Heat Running Pace Adjustment Calculator – Temperature & Humidity Effect
Adjust your expected running pace for heat and humidity. Calculate how much slower to run in hot …
Lactate Threshold Pace Calculator
Calculate your lactate threshold pace from recent race times. Find the exact pace for tempo runs to …
Running Training Zone Calculator – Daniels Easy, Threshold & Interval Paces
Calculate your personalized running training zones from any race performance. Get Easy, Marathon, …
Track Split Calculator
Calculate your 200m and 400m lap splits needed to hit your target race time on a standard 400m …
Treadmill Pace Converter – Speed to Pace with Incline Adjustment
Convert treadmill speed (mph or km/h) to running pace (min/km or min/mile). Includes incline …
Ultra Marathon Pace Calculator
Calculate pacing strategies for 50K, 50 mile, 100K, and 100 mile ultramarathons. Includes aid …
VDOT Calculator – Jack Daniels Running Formula
Free VDOT calculator using Jack Daniels Running Formula. Enter any race result to get VDOT score and …
Калькулятор «стіни» марафону
Передбачте, коли ви вдаритесь об «стіну» в марафоні на основі запасів глікогену, темпу та маси тіла. …
33 calculators💪 Fitness & Health
Blood Type Calculator – Predict Child's Blood Type
Free blood type calculator. Enter both parents' blood types (ABO + Rh) to see possible blood types …
Daily Water Intake Calculator
Calculate how much water you should drink daily based on your weight and activity level. Use this …
Due Date Calculator
Calculate your estimated due date based on your last menstrual period or conception date. Find out …
eGFR Calculator – Estimated Glomerular Filtration Rate (Kidney Function)
Free eGFR calculator using the 2021 CKD-EPI formula. Estimate kidney function from serum creatinine, …
FFMI Calculator – Fat-Free Mass Index
Calculate your Fat-Free Mass Index (FFMI) to assess muscle development relative to height. Includes …
Heart Rate Zone Calculator
Calculate your target heart rate zones for training. Based on your age and resting heart rate using …
IVF Due Date Calculator
Free IVF due date calculator. Enter your embryo transfer date and embryo age (Day 3 or Day 5). …
TDEE Calculator
Free TDEE calculator. Compute Total Daily Energy Expenditure using Mifflin-St Jeor BMR. Get calorie …
Vitamin D Calculator
Estimate your daily vitamin D needs based on age, skin tone, and sun exposure. Find out if you need …
VO2 Max Estimator
Estimate your VO2 max from heart rate using the Uth-Sørensen formula. Use this free online fitness …
Waist to Hip Ratio Calculator
Calculate your waist-to-hip ratio to assess health risk related to body fat distribution. Use this …
Walking Calorie Calculator
Calculate calories burned walking based on your weight, pace, and duration. Includes options for …
54 calculators💰 Finance
Child Support Calculator – Estimate Payments
Estimate monthly child support payments using income shares and percentage of income models. …
Crypto Profit Calculator – Bitcoin & Cryptocurrency Profit/Loss
Free crypto profit calculator. Calculate profit, loss, and ROI on any cryptocurrency trade. Supports …
Dividend Calculator
Calculate annual dividend income, dividend yield, and total return from dividend-paying stocks. This …
Down Payment Calculator
Calculate how much down payment you need for a home or car. See loan amount, LTV ratio, and PMI …
Electricity Cost Calculator — Calculate Your Energy Bill (Free)
Calculate electricity costs from watts, hours per day, and your rate per kWh. Find out exactly what …
EV Charging Calculator — Time & Cost to Charge Your Electric Car
Calculate how long it takes to charge your electric vehicle and the total cost. Enter battery size, …
Gas Cost Calculator — Trip Fuel Cost Estimator
Calculate the gas cost for any road trip. Enter distance, MPG, and gas price per gallon to get your …
Income Tax Calculator
Estimate your federal income tax based on US tax brackets for 2024. Use this free online financial …
Paycheck Tax Calculator – Estimate Your Take-Home Pay
Free paycheck tax calculator. Enter your gross salary to estimate federal income tax, FICA, and net …
Social Security Calculator – Estimate Your Benefits
Estimate your Social Security retirement benefits based on earnings and retirement age. See how …
Tip Calculator
Calculate tip amount and split the bill. Enter bill total, tip percentage, and number of people to …
Water Bill Calculator — Estimate Your Monthly Water Cost
Calculate your monthly water bill based on daily gallons used and your utility's rate per 1,000 …
57 calculators🔢 Math
Distance Calculator
Calculate the distance between two points using the distance formula √((x₂-x₁)² + (y₂-y₁)²).
Distance Formula Calculator
Calculate the distance between two points using the distance formula. Enter coordinates (x1,y1) and …
Exponent Calculator
Calculate powers and exponents. Find the result of any base raised to any power. This free online …
Factorial Calculator
Calculate the factorial of any non-negative integer. n! = n × (n-1) × … × 2 × 1. This free online …
Fibonacci Calculator
Find the nth Fibonacci number and display the Fibonacci sequence up to that term. This free online …
Fraction Calculator
Add, subtract, multiply, and divide fractions. Get results as fractions and decimals. Simplify …
Free Online Graphing Calculator
Free graphing calculator. Plot any math function instantly — polynomials, trig, log, exponentials. …
GCF Calculator
Calculate the Greatest Common Factor (GCF/GCD) of two or more numbers. Also known as Greatest Common …
GPA Calculator
Calculate your Grade Point Average. Enter your grades and credit hours to get your weighted GPA. Use …
Hex Calculator
Add, subtract, and convert hexadecimal numbers. Perform hex arithmetic and convert to decimal or …
Triangle Calculator
Calculate area, perimeter, and angles of a triangle given sides or dimensions. This free online math …
Unit Circle Calculator
Calculate exact sine, cosine, and tangent values for any angle on the unit circle. Try this free …
58 calculators🔄 Conversions
Acres to Square Feet Converter — ac to sq ft (Instant, Free)
Convert acres to square feet and square feet to acres instantly. Essential for real estate, land …
Bytes to MB Converter — Convert Bytes to Megabytes Instantly
Convert bytes to megabytes (MB) instantly. Uses the binary definition: 1 MB = 1,048,576 bytes. …
Calories to Joules Converter — cal to J (Instant, Free)
Convert food Calories (kcal) and small calories to joules instantly. Includes kJ reference, …
Celsius to Kelvin Converter — °C to K (Instant, Free)
Convert Celsius to Kelvin instantly online. Formula: K = °C + 273.15. Includes conversion table, …
CM to MM Converter — cm to mm (Instant, Free)
Convert centimeters to millimeters and millimeters to centimeters instantly. Simple formula: …
Cups to Gallon Converter — cups to gal (Instant, Free)
Convert cups to gallons instantly. Cups to US gallon conversion with formula, table, and calculator. …
Cups to Liters Converter — US Cups to Liters (Instant, Free)
Convert US cups to liters and liters to cups instantly. 1 cup = 0.236588 liters. Includes conversion …
Cups to Oz Converter — Cups to Fluid Ounces (Instant, Free)
Convert cups to fluid ounces and oz to cups instantly. Simple multiplication by 8 for US cups. …
Days to Hours Converter — days to hr (Instant, Free)
Convert days to hours and hours to days instantly. Includes conversion table, running training …
Dress Size Converter
Convert women's dress sizes between US, UK, EU, FR/ES, IT, and AU/NZ instantly. Try this free online …
Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius and Kelvin instantly. Accurate temperature conversion calculator. Use …
Fahrenheit to Kelvin Converter — °F to K (Instant, Free)
Convert Fahrenheit to Kelvin instantly online. Formula: K = (°F − 32) × 5/9 + 273.15. Includes …
98 calculators📅 Date & Time
Time Add Subtract Calculator
Add or subtract hours, minutes, and seconds from any time. Get the resulting time instantly. Use …
Time Duration Calculator
Calculate the duration between two times or add/subtract hours, minutes, and seconds from a time. …
Time Zone Converter
Convert time between time zones. See what time it is anywhere in the world right now. Try this free …
Weeks Calculator
Calculate the number of weeks between two dates or find a date a certain number of weeks from now. …
Калькулятор «Скільки днів до»
Розрахуйте, скільки днів залишилося до певної дати. Зворотний відлік до дня народження, свят, подій …
Калькулятор віку
Розрахуйте свій точний вік у роках, місяцях, днях, годинах та хвилинах. Дізнайтеся, скільки днів ви …
Калькулятор днів між датами
Calculate the exact number of days between two dates. Find business days, weekdays, weekends, and …
Калькулятор дня народження
Дізнайтеся, в який день тижня ви народилися та в який день буде ваш наступний день народження. …
Калькулятор додавання днів до дати
Додайте або відніміть будь-яку кількість днів від дати. Дізнайтеся результуючу дату та день тижня …
Калькулятор різниці дат
Розрахуйте кількість днів, тижнів, місяців і років між двома датами. Знайдіть точну тривалість між …
Калькулятор різниці у віці
Розрахуйте точну різницю у віці між двома людьми в роках, місяцях та днях. Безкоштовний …
Калькулятор робочих днів
Порахуйте кількість робочих днів (будніх) між двома датами, виключаючи вихідні. Безкоштовний …
🏠 Everyday
Dog Age Calculator
Convert your dogs age to human years using the latest scientific research. Try this free online tool …
Electricity Bill Calculator
Free electricity bill calculator. Enter your kWh usage and rate to estimate your monthly electricity …
Electricity Cost Calculator
Calculate how much an appliance costs to run based on wattage and usage hours. Use this free online …
Fuel Cost Calculator
Calculate trip fuel cost based on distance, fuel efficiency, and current gas price. Use this free …
Gas Mileage Calculator
Calculate your fuel efficiency in MPG or L/100km and estimate fuel costs. Try this free online tool …
Grade Calculator
Calculate your weighted average grade from multiple assignments and their weights. This free tool …
Rent Split Calculator
Free rent split calculator. Divide rent equally or proportionally by room size. Instantly see each …
Wedding Budget Calculator
Estimate your wedding costs by budget, guest count, and key categories like venue, catering, and …
Word Counter
Count words, characters, sentences, and paragraphs in your text. Estimate reading time and speaking …
Генератор паролів
Генеруйте надійні випадкові паролі будь-якої довжини. Налаштовуйте великі та малі літери, цифри та …
Калькулятор вартості переїзду
Оцініть витрати на переїзд залежно від відстані, розміру будинку та кількості необхідних …
Калькулятор віку домашніх тварин
Конвертуйте вік вашого домашнього улюбленця в людські роки для кішок, собак, кроликів, морських …
20 calculators🔬 Science & Engineering
🔨 Construction & DIY
Board Foot Calculator
Free board foot calculator. Calculate lumber volume in board feet, estimate material costs, and plan …
Cubic Yard Calculator
Free cubic yard calculator. Convert length, width, and depth measurements into cubic yards, cubic …
Roof Calculator
Free roof calculator. Estimate roof area, number of shingles, squares, and materials needed for any …