EasyUtil
Calculators, converters, and fun tools — all the utilities you need.
Official Data
Built on NTS tax tables, NHIS insurance rates, and government-published formulas — updated within 7 days of regulatory changes.
100% Private
All calculations run in your browser. No data is collected, stored, or sent to any server. Ever.
Instant Results
No signup, no downloads. Just enter your numbers and get accurate results in seconds — completely free.
💰Finance & Tax (South Korea)
National Pension Calculator (Korea)
Estimate monthly Korean national pension based on income and contribution period.
Take-Home Pay Calculator (Korea)
Calculate net salary after Korean tax and social insurance deductions.
Severance Pay Calculator (Korea)
Estimate severance pay under Korean labor law based on tenure and salary.
Loan Interest Calculator
Calculate monthly repayments for equal principal and interest.
Savings Interest Calculator
Calculate maturity interest and after-tax returns on deposits.
Percentage Calculator
Easily calculate ratios, discounts, and percentages.
Capital Gains Tax Calculator (Korea)
Estimate Korean tax on property sales with long-term holding deductions.
Gift Tax Calculator (Korea)
Calculate Korean gift tax with relationship-based deductions.
Unemployment Benefits Calculator (Korea)
Estimate Korean employment insurance benefits after leaving a job.
Jeonse–Monthly Rent Converter (Korea)
Convert between Korean lump-sum deposit (Jeonse) and monthly rent.
Health Insurance Calculator (Korea)
Calculate Korean national health insurance premium contribution.
Earned Income Tax Credit (Korea)
Estimate Korean earned income tax credit by household type.
Income Tax Calculator (Korea)
Calculate Korean comprehensive income tax and tax due.
Car Registration Tax (Korea)
Calculate Korean vehicle acquisition tax, bond purchase, and stamp duty.
Housing Subscription Score (Korea)
Calculate your Korean housing subscription (cheongnyak) points.
Property Acquisition Tax (Korea)
Calculate Korean property acquisition tax, education tax, and rural special tax.
Car Insurance Calculator (Korea)
Estimate Korean auto insurance premium by vehicle type, driver age, experience, and grade.
Electricity Bill Calculator (Korea)
Calculate your Korean residential electricity bill with tiered progressive pricing, VAT, and power industry fund included.
Latte Factor Calculator
What if you invested your daily coffee money? See how small daily spending grows into a fortune through compound interest.
Real-Time Hourly Wage Counter
Calculate your hourly, per-minute, and per-second wage from annual or monthly salary. Watch your earnings tick up in real time.
Global Income Rank Calculator
Find out where your income ranks globally. See your top percentile, Korean rank, and country comparisons.
⚖️Health
🔄Lifestyle & Utils
Unit Converter
Convert length, weight, and area units in real time.
Character Counter
Count characters and words in real time.
D-Day Calculator
Count days until anniversaries, exams, and events.
GPA Calculator
Calculate your grade point average.
GPA Converter (Korean Scales)
Convert grades between 4.5, 4.3, 4.0 scales and 100-point percentile scores using the standard Korean conversion table.
Age Calculator
Calculate your exact age, zodiac sign, and days until next birthday.
Life Timeline — Visualize Your Life in Weeks
See your entire life as a grid of weeks. Enter your birth date and life expectancy to visualize weeks lived, weeks remaining, and life progress.
Delivery vs Pickup Comparison
Compare delivery and pickup costs including delivery fee, travel cost, and time value.
Decibel Meter (Noise Meter)
Measure ambient noise levels in real time using your microphone. See dB readings and a noise level reference chart.
Screen Ruler (Online Ruler)
Calibrate your screen and measure real cm/inch sizes. Credit card calibration, point-to-point measurement, A4/business card overlays.
👶Baby & Parenting
Due Date Calculator
Calculate your estimated due date and pregnancy week.
Baby Feeding Calculator
Calculate the right feeding amount for your baby's weight.
Baby Solid Food Stage Calculator
Enter your baby's birth date to see the current weaning stage, upcoming schedule, and stage-by-stage feeding guide.
Baby Age Calculator
Calculate your baby's age in months and days.
Vaccination Schedule
Check your child's recommended vaccination schedule.
Baby Growth Percentile
Check height and weight percentiles based on WHO standards.
Baby Sleep Calculator
Recommended sleep times and nap guide by age.
Baby Height Predictor
Predict your child's adult height from parents' heights.
🎮Fun & Games
Bubble Wrap
Pop virtual bubble wrap to relieve stress.
Click Counter
Challenge yourself — how fast can you click?
Reaction Time Test
Measure your reaction speed.
Color Match Game
Find the one different color — a color perception test.
Dice Roller
Roll 1–3 dice online.
Number Guessing (Up & Down)
Guess a number between 1 and 100.
Time Guessing Game
Can you guess the time accurately by feel?
Typing Speed Test
Measure your typing speed and accuracy.
Why EasyUtil?
EasyUtil was created because everyday calculations shouldn't require specialized knowledge. Whether you're a salaried worker trying to understand your paycheck deductions, a new parent tracking your baby's growth milestones, or a student calculating your GPA before graduation — you deserve accurate answers without complexity.
Every calculator on this site is built using official data sources: the National Tax Service's simplified wage income tax tables, the National Health Insurance Service's premium rates, and WHO growth standards for pediatric tools. When tax rates change or insurance premiums are adjusted, we update the affected calculators promptly so your results always reflect current standards.
All calculations run entirely in your browser — your salary figures, health data, and personal information never leave your device. No account creation, no app installation, no hidden fees. Just the answers you need, when you need them.