The math you need, right in your browser.
Everyday calculators and converters for life and work in Korea. Every tool comes in five languages, and what you type never leaves your device.
Quick tools
Common calculations, done right on the home page.
All tools 36
- Weekly Holiday Pay
- Hourly ↔ Monthly Wage
- Overtime Pay Calculator
- Annual Leave Calculator
- Severance Pay Calculator
- D-day Counter
- Days Between Dates
- Age Calculator
- Pyeong ↔ m²
- Unit Converter
- Unit Price Comparison
- VAT Calculator
- Loan Calculator
- Percent Calculator
- Group expense split
- Character Counter
- CSV Encoding Repair
- Normalize File Names
- Clean Text Line Breaks
- Image Converter
- Image Compressor
- Image Resizer
- Photo Metadata Remover
- Images to PDF
- Screenshot Redaction
- Four-photo booth
- Signature PNG maker
- Password Generator
- Random Draw and Teams
- Random Bill Split Game
- 10-second challenge
- Pass the bomb
- Secret group vote
- Same word challenge
- Group scoreboard
- QR code maker
Try another word, or tell us what you need.
How Daytool works
Runs on your device
Numbers, text and images you enter are processed in your browser only. Nothing is sent to a server or saved.
Five languages
Every tool is available in Korean, English, Japanese, Chinese and Vietnamese, so you can share it with Korean coworkers too.
Sources and dates
Tools based on laws or official rates show the legal basis and the date we last checked, and we update them when rules change.
Built for life and work in Korea
Korean pay rules, apartment sizes and age systems explained in plain language — with the original Korean terms, so you can talk to your employer or landlord with confidence.