Get your calculations and text cleanup done in seconds
Values you enter never leave your device. No sign-up or install needed.
Calculators
Loan interest calculator
Enter a loan amount, rate, and term to compare equal payments, equal principal, and interest-only repayment, with a monthly schedule.
Severance pay calculator
Enter your start and leaving dates, recent wages, bonuses, and leave pay for an estimate of Korean severance pay.
Korean hourly and monthly wage calculator
Convert an hourly wage to a monthly wage in Korea and back, including weekly holiday pay (juhyu sudang) and the 209-hour monthly standard.
Date difference calculator
Enter a start and end date to get the number of days and weeks between them. Leap years are included.
Add days to a date
Add or subtract days from a date to find the date and weekday N days later or earlier. Supports counting the start date as day 1.
Korean age calculator
Find your Korean age in all three systems: international age (man-nai), year age (yeon-nai), and traditional counting age (se-neun-nai).
Korean military discharge date calculator
Find the discharge date for Korean military service from the enlistment date: Army and Marines 18 months, Navy 20, Air Force 21, social service 21.
BMI calculator
Enter your height and weight to get your BMI and weight category. Adult reference only, not a medical diagnosis.
Pyeong to square meters converter
Convert pyeong, the Korean unit of floor area, to square meters and back. 1 pyeong is about 3.3058 m², or about 35.58 square feet.
Percentage calculator
Four percentage calculations in one place: B% of A, what percent A is of B, percent change from A to B, and A increased or decreased by B%.
Text tools
Character counter
Paste your text to count characters with and without spaces, words, and lines instantly.
Case converter
Convert English text to uppercase, lowercase, title case, or sentence case in one click.
Line break and space cleanup
Clean up copied text by trimming spaces at the start and end of each line and collapsing repeated blank lines.
Remove duplicate lines
Remove repeated lines from a list and keep only the first occurrence. Case-insensitive matching is available.
Guides
How severance pay works in Korea
How Korean severance pay works: who is eligible, the official formula, how average wage is calculated, and when it must be paid.
Korean age explained
How Korean age works, why Korea switched to international age in 2023, and where year age is still used, such as buying alcohol and tobacco.
Korean vs WHO BMI categories
Why a BMI of 24 is normal under WHO categories but pre-obese in Korea. Compare the two scales and the research behind lower Asian cut-offs.