Numvion
Free Online Calculators & Tools
Free online calculators for BMI, age, percentage, unit conversion, and more. Fast, accurate, available in 15 languages.
🔥 Trending Now
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Find out if you are underweight, normal, overweight, or obese based on your height and weight.
Age Calculator
Calculate your exact age in years, months, and days. Find out your next birthday, day of birth, zodiac sign, and total days lived.
Password Generator
Generate strong, secure random passwords. Customize length, characters, and complexity. Strength analysis included.
Tip Calculator
Calculate tip amount and split the bill between multiple people. Supports custom tip percentages.
Sleep Calculator
Calculate the best bedtime or wake-up time based on 90-minute sleep cycles for maximum energy.
Countdown Timer
Create a countdown timer to any date and time. See days, hours, minutes, and seconds remaining.
How Many Days Have I Lived?
Find out exactly how many days, weeks, hours, and heartbeats you have lived since your birthday.
JSON Formatter & Validator
Format, validate and beautify JSON instantly. Detect syntax errors with clear messages. Free online JSON formatter tool.
QR Code Generator
Generate QR codes instantly for any text, URL, email or phone number. Download as PNG. No server required.
Quit Smoking Calculator
Calculate money saved, cigarettes avoided and health benefits since you quit smoking. Enter your quit date and pack price.
⭐ Popular Tools
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Find out if you are underweight, normal, overweight, or obese based on your height and weight.
Age Calculator
Calculate your exact age in years, months, and days. Find out your next birthday, day of birth, zodiac sign, and total days lived.
Percentage Calculator
Calculate percentages, percentage change, increase, decrease, and more. Instant results with step-by-step explanations.
Unit Converter
Convert between length, weight, volume, area, and speed units instantly. Supports metric and imperial systems.
Password Generator
Generate strong, secure random passwords. Customize length, characters, and complexity. Strength analysis included.
Calorie Calculator
Calculate your daily calorie needs (TDEE) and basal metabolic rate (BMR) based on age, weight, height, and activity level.
Days Between Dates
Calculate the exact number of days, weeks, months, and years between two dates. Add or subtract days from a date.
Countdown Timer
Create a countdown timer to any date and time. See days, hours, minutes, and seconds remaining.
Work Hours Calculator
Calculate total work hours, overtime, and weekly hours. Perfect for tracking work time and payroll.
JSON Formatter & Validator
Format, validate and beautify JSON instantly. Detect syntax errors with clear messages. Free online JSON formatter tool.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text instantly. No server, works entirely in your browser.
QR Code Generator
Generate QR codes instantly for any text, URL, email or phone number. Download as PNG. No server required.
Daily Water Intake Calculator
Calculate your recommended daily water intake based on body weight and activity level. Supports metric and imperial.
Room Area Calculator (m²)
Calculate room area in square meters or square feet. Add multiple rooms and get total area instantly.
Quit Smoking Calculator
Calculate money saved, cigarettes avoided and health benefits since you quit smoking. Enter your quit date and pack price.
HEX ↔ RGB Color Converter
Convert HEX color codes to RGB values and vice versa. Preview colors instantly. Essential tool for designers and developers.
Text to URL Slug Generator
Convert any title or text into a clean, SEO-friendly URL slug. Removes special characters and spaces automatically.
Categories
🛠️ All Tools
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Find out if you are underweight, normal, overweight, or obese based on your height and weight.
Age Calculator
Calculate your exact age in years, months, and days. Find out your next birthday, day of birth, zodiac sign, and total days lived.
Percentage Calculator
Calculate percentages, percentage change, increase, decrease, and more. Instant results with step-by-step explanations.
Unit Converter
Convert between length, weight, volume, area, and speed units instantly. Supports metric and imperial systems.
Password Generator
Generate strong, secure random passwords. Customize length, characters, and complexity. Strength analysis included.
Calorie Calculator
Calculate your daily calorie needs (TDEE) and basal metabolic rate (BMR) based on age, weight, height, and activity level.
Days Between Dates
Calculate the exact number of days, weeks, months, and years between two dates. Add or subtract days from a date.
Word Counter
Count words, characters, sentences, and paragraphs instantly. Estimate reading and speaking time for your text.
Tip Calculator
Calculate tip amount and split the bill between multiple people. Supports custom tip percentages.
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Bidirectional conversion.
Sleep Calculator
Calculate the best bedtime or wake-up time based on 90-minute sleep cycles for maximum energy.
Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB and more. Supports SI and binary units.
Countdown Timer
Create a countdown timer to any date and time. See days, hours, minutes, and seconds remaining.
How Many Days Have I Lived?
Find out exactly how many days, weeks, hours, and heartbeats you have lived since your birthday.
Work Hours Calculator
Calculate total work hours, overtime, and weekly hours. Perfect for tracking work time and payroll.
JSON Formatter & Validator
Format, validate and beautify JSON instantly. Detect syntax errors with clear messages. Free online JSON formatter tool.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text instantly. No server, works entirely in your browser.
QR Code Generator
Generate QR codes instantly for any text, URL, email or phone number. Download as PNG. No server required.
Daily Water Intake Calculator
Calculate your recommended daily water intake based on body weight and activity level. Supports metric and imperial.
Room Area Calculator (m²)
Calculate room area in square meters or square feet. Add multiple rooms and get total area instantly.
Quit Smoking Calculator
Calculate money saved, cigarettes avoided and health benefits since you quit smoking. Enter your quit date and pack price.
Morse Code Translator
Translate text to Morse code or decode Morse code to text instantly. Supports dots, dashes and spaces.
Binary ↔ Text Converter
Convert plain text to binary (ASCII) or binary back to readable text. Instant results, no installation needed.
HEX ↔ RGB Color Converter
Convert HEX color codes to RGB values and vice versa. Preview colors instantly. Essential tool for designers and developers.
Text to URL Slug Generator
Convert any title or text into a clean, SEO-friendly URL slug. Removes special characters and spaces automatically.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates or convert any date to a Unix timestamp. Milliseconds supported.
All Free Online Calculators
Free online calculators for BMI, age, percentage, unit conversion, and more. Fast, accurate, available in 15 languages.