Utility Tools

Scientific calculator supporting basic arithmetic and scientific functions (trigonometric, logarithmic, square root, etc.).

Calculate percentages, percentage increase/decrease, and find the percentage of a number.

Add, subtract, multiply, and divide fractions with simplification, mixed numbers, and decimal conversion.

Calculate the mean, median, mode, and standard deviation of multiple numbers. Enter numbers separated by commas, newlines, or spaces.

View all 15 math calculators

Calculate monthly payments and interest for equal payment and equal principal methods.

Calculate net salary after deductions for 4 major insurances and taxes (Korea).

Calculate how much you need to save to reach your goals. Simulate your future savings with initial deposit, monthly contributions, and interest rate.

More calculators

Calculate your international age, Korean age, and days until your next birthday.

Calculate days between two dates, or add/subtract days from a specific date.

Set target dates and count down to your important events. Save multiple events and track progress.

Count characters, words, and bytes in your text.

Count words, characters, sentences, and paragraphs in your text in real-time. Estimate reading and speaking time.

Sort text lines alphabetically or by length. Remove duplicates and reverse order options available.

Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K). Features real-time conversion and visual thermometer.

Convert between metric (mm, cm, m, km) and imperial (inch, ft, yd, mile) units.

Convert between metric (mg, g, kg) and imperial (oz, lb, st) weight units.

Generate secure, random passwords instantly. Customize length, uppercase, lowercase, numbers, and symbols.

Convert URLs, text, and contacts into QR codes.

Generate secure, random UUID v4 identifiers. Create multiple UUIDs at once and copy them easily.

Securely generate numbers for Lotto 6/45, Powerball, Mega Millions, and EuroMillions.