Grouped into 6 sets by the situation you are in. For each of the 23 calculators the table below lists what you enter, what comes out, and which year's rules it applies, so you can pick the right one before opening it. Everything runs in your browser - nothing you type is stored or sent anywhere.
Gross pay and take-home pay are two different numbers in Korea. After the four national insurances and income tax, roughly 83-88% of a salary reaches the bank account, and that same figure later becomes the basis for severance and unemployment benefits. All eight calculators here start from one input: your monthly salary.
| Calculator | What you enter | What you get | Basis |
|---|---|---|---|
| Korean Take-home Pay | Annual or monthly gross salary, dependants | Monthly net pay after insurances and tax | 2026 insurance rates & withholding table |
| Hourly Wage (Korea) | Hourly rate, weekly hours, days worked | Monthly pay including weekly holiday allowance | 2026 minimum wage rules |
| Severance Pay | Start date, last day, last 3 months of pay, bonuses | Average daily wage and total severance | Employee Retirement Benefit Security Act |
| Unemployment Benefit | Age, months insured, pre-departure salary | Daily benefit and number of months payable | 2026 upper and lower limits |
| Parental Leave Pay | Ordinary wage, months of leave | Monthly and total benefit | 2026 parental leave caps |
| National Pension | Years contributed, average monthly income | Estimated monthly pension, early vs deferred | 2026 A-value formula |
The same interest rate plays out very differently depending on which side of it you sit. Switching repayment method alone can swing total loan interest by millions of won, and Korean deposit interest is taxed at 15.4% before it reaches you. Every calculator in this group reports the after-tax, after-fee figure.
| Calculator | What you enter | What you get | Basis |
|---|---|---|---|
| Loan Payments | Principal, rate, term, repayment method | Monthly payment, total interest, amortisation | Equal-payment / equal-principal formulas |
| Early Repayment Fee | Outstanding principal, fee rate, months elapsed | Fee payable now vs interest saved | Standard 3-year sliding scale |
| Savings Maturity | Monthly deposit or lump sum, rate, term | After-tax maturity amount and real yield | 15.4% Korean interest income tax |
| Compound Interest | Principal, contributions, return, term, frequency | Balance over time, principal vs gains | Compound formula, pre-tax |
Tax calculators get opened more often to check a refund than a bill. Much of the 3.3% withheld from Korean freelancers comes back at filing time, while buying a car or a home adds 7-13% of the price in acquisition taxes alone.
| Calculator | What you enter | What you get | Basis |
|---|---|---|---|
| Income Tax (Korea) | Annual revenue, expenses, deductions | Tax due and refund against 3.3% withheld | 2026 income tax brackets |
| Car Purchase Tax | Vehicle price, engine size, region | Registration cost incl. acquisition tax and bonds | Local Tax Act, 2026 |
| Property Tax (Korea) | Purchase price, holding period, homes owned | Acquisition tax and capital gains estimate | 2026 rates and heavy-tax rules |
Two conversions decide what actually goes into a Korean lease: deposit-to-monthly-rent, and pyeong-to-square-metres. The conversion rate has a legal ceiling, and the '34 pyeong' in a listing is not the floor space you live in.
| Calculator | What you enter | What you get | Basis |
|---|---|---|---|
| Jeonse to Monthly Rent | Deposit, reduced deposit, conversion rate | Fair monthly rent and legal cap check | Housing Lease Protection Act |
Utility bills and health charts run on formulas too. Korean electricity pricing jumps the moment usage crosses a tier line, and basal metabolic rate can differ by hundreds of kilocalories a day between two people of the same weight.
| Calculator | What you enter | What you get | Basis |
|---|---|---|---|
| Electricity Bill | Monthly kWh, season, housing type | Charge by progressive tier and final bill | KEPCO residential tariff |
| BMI & Calories | Height, weight, age, sex, activity level | BMI category and daily calorie need | Mifflin-St Jeor equation |
| Marine Units | Knots, nautical miles, fathoms, Beaufort | Metric equivalents and sea state | 1 NM = 1,852 m |
Working in the US or sending money across borders follows different arithmetic. State tax stacks on top of federal tax, capital gains hinge on whether you held for more than a year, and on a remittance the exchange-rate margin usually costs more than the advertised fee.
| Calculator | What you enter | What you get | Basis |
|---|---|---|---|
| US Paycheck | Salary, state, filing status | Net pay after federal, state and FICA | 2026 federal brackets + state rates |
| US Salary Table | No input - look up your band | Net pay by salary band and state | Precomputed for 2026 |
| US Capital Gains | Buy and sell price, holding period, income | Short-term vs long-term tax side by side | 2026 capital gains rates |
| US Home Sale Costs | Sale price, state, holding period | Closing costs and capital gains estimate | State rates and closing conventions |
| US Car Cost | Price, down payment, APR, term | Cash vs loan vs lease total cost | Total cost of ownership |
| Remittance | Amount, currency, fee, applied FX rate | Amount received and true total cost | Margin over mid-market rate |
The Basis column was last checked on 26 July 2026. Rates change every year, so check the sources and reference year stated inside each calculator page.