All Tools
Explore our complete collection of free online calculators and utilities. Each tool is fast, private, and easy to use.
📅 Date & Time
7 tools
Age CalculatorCalculate your exact age in years, months, and days from any birth date.
Birthday CountdownCount down the exact days, hours, and minutes until your next birthday.
Days Until Specific DateAdvanced countdown to any future date with holiday presets and saved events.
Days Between DatesCalculate the exact days, weeks, or months between any two dates.
Date CalculatorAdd or subtract days from any date to find a future or past date.
Time Duration CalculatorCalculate elapsed time between two clock times, handles midnight crossings.
Workdays CalculatorCount business days between dates, excluding weekends and public holidays.
💪 Health & Fitness
3 tools
BMI CalculatorCheck your Body Mass Index and see your healthy weight category.
Water Intake CalculatorFind your ideal daily water intake based on weight and activity level.
Ideal Sleep Time CalculatorGet your perfect bedtime or wake-up time based on 90-minute sleep cycles.
📚 Education
1 tool
🔢 Everyday Math
6 tools
Percentage CalculatorCalculate percentages, percent change, and differences between numbers.
Unit ConverterConvert length, weight, temperature, area, volume, speed, and more.
Tip Calculator & Bill SplitterCalculate tip amounts and split the bill equally among your group.
Random Number GeneratorGenerate random numbers in any range, pick multiple, avoid duplicates.
Password GeneratorCreate strong, secure passwords with custom length and character sets.
Scientific CalculatorFull scientific calculator with trig, logarithms, powers, roots, and memory.
🎮 Fun & Tests
2 tools