101 tools and forms · all free · nothing to install
Tricky Korean numbers,
Take-home salary— solved in 3 seconds.
81 free calculators and tools, plus 20 business forms. Tax, payroll, wire-size, breaker and voltage-drop calculations show the law or standard behind them. No signup — search, type, get the answer.
All 101 tools and forms — tap any to open
- Salary Take-Home
- 4 Insurances + Net Pay
- Weekly Rest Pay
- Unemployment Benefit
- Mandatory Training Checker
- Income Tax
- Capital Gains Tax
- Gift Tax
- Foreign Stock Tax
- Foreign Flat Tax (19%)
- School Grade
- Size Converter
- Name Romanizer
- Cost of Living
- Korean Romanizer
- Hangul Decomposer
- Health Insurance (NHIS)
- F-2-7 Residence Visa
- D-8 Startup Visa
- Apartment Area & Price/Pyeong
- Rent Cap (5%)
- Gravel
- Brick & Block
- Wallpaper
- Tile
- Roof Area
- Drywall
- OSB
- Studs
- Insulation Batts
- Rafter
- Material Quantity
- Deck & Fence
- Concrete Spec Finder
- Breaker Capacity
- Voltage Drop
- Percent
- Distance Converter
- Annual Car Tax
- Electricity Bill
- Quotation Builder
- Loan Note Builder
- Transaction Statement
- Expense Report
- Power of Attorney
- Construction Contract
- Lease Contract
- Safety Management Plan
- Completion Notice
- Construction Plan
- Business Number Validation
- Severance
- Annual Leave
- Min Wage → Monthly
- Resignation Letter
- VAT
- Loan Calculator
- Freelancer 3.3%
- Compound Interest
- Prepayment Penalty
- Korean Age
- Gift Money
- Due Date
- Voltage & Plug
- Remittance Cost
- Korean Numbers
- Stay Days Tracker
- Pension Refund
- F-5 Permanent Residence
- Jeonse ↔ Wolse + Scam Check
- Brokerage Fee
- Underwater Jeonse Risk
- Concrete
- Rebar Weight
- Paint
- Plaster Mortar
- Roof Pitch
- Plywood
- Siding
- Insulation R/U
- Span
- Truss & bevel cut
- Stairs
- Lumber Conversion
- Power Conversion
- Wire Size
- Pyeong ↔ m²
- Temperature
- JSON ↔ CSV
- Acquisition Tax
- BTU / AC Sizing
- Overdue Payment Notice
- Risk Assessment Builder
- Employment Contract
- Leave Request Form
- Meeting Minutes
- Real Estate Sale Contract
- Inspection and Test Plan
- Commencement Notice
- Daily Work Report
- Progress Payment Claim
Top search arrivals
Most used right now
Every calculation, covered
11 categories · 101 tools and forms
0
Free tools
0
Categories
0
Languages
0
Business forms
Attractions · Food · Policy
A place, a dish, and a rule to know
One pick from each of our guides to Korean attractions, food, and rule changes.
Destination
Maisan
Maisan, in Jinan, North Jeolla, takes its name from two rock peaks rising side by side like a horse's ears. Amid otherwise soil-covered hills, only these two stand exposed in pale grey stone, recognisable at a distance in a single glance. Their surfaces are pocked as though studded with pebbles — because the mountain is conglomerate, gravel cemented into rock.
Read post
Food
Makguksu
Makguksu is a Gangwon dish of buckwheat noodles served cold, either tossed with sauce or in broth. The mak in its name is usually read as "just now" — buckwheat noodles, unlike wheat, break apart if left standing, so they have to be eaten as soon as they are extruded. It is often compared to naengmyeon, but where naengmyeon is a refined urban dish, makguksu is closer to how mountain communities actually ate buckwheat.
Read postPolicy
Korean residence certificates will simply say 'household member' or 'cohabitant' — effective October 2026
Under amendments to the Enforcement Decree and Rules of the Resident Registration Act, previewed by the Ministry of the Interior and Safety in November 2025, the relationship-to-householder field on residence certificates will be simplified: family other than the spouse becomes 'household member', and everyone else becomes 'cohabitant'. The aim is to stop documents from revealing more about a family than necessary, particularly in remarried households. The ministry has announced October 2026, and the national law database records the amended provisions as taking effect on 29 October 2026.
Read postMore to explore
Soswaewon GardenNaejangsanDaewangam ParkPagyesa Temple, PalgongsanYukgaejangManduGamjatangBossamKorea's exit tax will cover foreign shares from 2027 — applying to departures on or after 1 January 2027Monthly payroll reporting to the tax office — the monthly simplified payment statement slips again, to January 2027Korea's 2027 minimum wage set at 10,700 won per hour, effective 1 January 2027
Stories behind the calculators
Field Notes
MAKER LAB
More experiments from the maker of Workmate
Games · quizzes · services — indie projects built and run by one maker.
Missing a calculator you need? Suggest a tool