Free Online Calculators
Financial planning, health metrics, and tax estimation — all in one place. Pick a calculator to get instant, transparent results.
Salary After Tax
Calculate your net salary after South Korean income tax and social insurance deductions.
Monthly Salary Calculator
Calculate monthly take-home pay with South Korean tax brackets and insurance premiums.
Severance Pay Calculator
Calculate severance pay based on Korean labor law. Enter work period and average wage.
Pension Calculator
Simulate DB and DC pension plans for Korean retirement planning. Compare returns.
Tax Refund Calculator
Estimate your year-end tax refund in South Korea based on deductions and credits.
Mortgage Calculator
Calculate monthly mortgage payments with principal and interest amortization schedule.
Loan Interest Calculator
Calculate simple and compound interest on loans. Compare different repayment schedules.
Credit Card Interest Calculator
Calculate installment and revolving credit card interest to manage your finances better.
Currency Converter
Convert between world currencies with live exchange rates from a free public API.
Inflation Calculator
Calculate the impact of inflation on purchasing power over time with adjustable rates.
BMI Calculator
Calculate your Body Mass Index with height and weight. See your BMI category and health range.
Calorie Calculator
Calculate daily calorie needs using the Mifflin-St Jeor equation based on your activity level.
Health Insurance Calculator
Calculate Korean national health insurance premiums based on your income and employment type.
Health Insurance Voluntary
Compare voluntary continuation vs regional health insurance premiums after leaving employment in Korea.
Crypto Tax Calculator
Calculate capital gains tax on cryptocurrency transactions in Korea with 2.5M KRW exemption.
Inheritance & Gift Tax
Estimate Korean inheritance and gift tax with progressive rates (10–50%) and relationship-based deductions.
Unemployment Benefit Calculator
Estimate Korean unemployment benefit amount and duration based on your age, tenure, and average wage.
Freelancer Tax (3.3%)
Calculate net income for Korean freelancers after 3.3% withholding tax and estimated income tax.
Military Discharge Date
Calculate your military discharge date based on enlistment date and branch of service in Korea.
About These Calculators
Financial decisions are hard to make without numbers. How much of your salary actually reaches your bank account after taxes and insurance? How much interest will you pay over a 30-year mortgage? What happens to your purchasing power after a decade of 3% inflation? These calculators turn vague questions into concrete answers.
The Korean tax calculators form the core of this collection. The Salary After Tax calculator applies current income tax brackets, national pension, health insurance, employment insurance, and long-term care insurance to show your net pay. The Monthly Salary Calculator breaks that down on a monthly basis. For year-end settlement, the Tax Refund Calculator estimates whether you owe additional tax or can expect a refund based on your deductions and credits. And the Severance Pay Calculator computes your entitlement under Korean labor law when leaving a job.
Loan and debt calculators help you plan larger purchases. The Mortgage Calculator generates a full amortization schedule showing how much of each payment goes toward principal versus interest. The Loan Interest Calculator compares simple and compound interest across different repayment terms, and the Credit Card Interest Calculator shows the true cost of installment and revolving credit — numbers your credit card statement does not make obvious.
For retirement planning, the Pension Calculator simulates both DB (defined benefit) and DC (defined contribution) plans, so you can compare expected returns and plan accordingly. The Currency Converter pulls live exchange rates, and the Inflation Calculator shows how prices change over time — useful for long-term financial modeling.
Health calculators round out the set. The BMI Calculator classifies your body mass index, the Calorie Calculator estimates daily energy needs using the Mifflin-St Jeor equation, and the Health Insurance Calculator computes Korean national health insurance premiums.
Newer additions expand the collection further. The Crypto Tax Calculator computes capital gains tax on cryptocurrency transactions with the 2.5 million KRW basic deduction. The Inheritance & Gift Tax Calculator applies Korea's progressive 10–50% rates with relationship-based deductions. The Unemployment Benefit Calculator estimates your benefit amount and duration, and the Freelancer Tax Calculator shows your net income after the 3.3% withholding. The Health Insurance Voluntary Calculator compares voluntary continuation vs regional premiums, and the Military Discharge Date Calculator counts down to your discharge date. Every calculator shows its formula and assumptions — no black boxes, just transparent math.