Everyday Calculators & Utilities
Age and D-day, unit conversion, electricity bill, BMI, due date, QR codes, timers and more. Enter values and get results immediately; each tool explains how it calculates.
18 tools in this category
- Korea LinksOfficial and major Korean websites grouped by category: OTT, movies, dramas and TV, webtoons, comics, sports, government, finance, travel, news, shopping, learning, development, AI tools and search tools. Search by name.
- Age CalculatorGet international, year and Korean counting age from a birth date, plus days to your next birthday, days lived, Chinese zodiac and star sign.
- Korean Lunar Birthday CalculatorConvert between solar and Korean lunar dates and see which solar date your lunar birthday falls on each year, including leap months and day-30 birthdays.
- D-Day CalculatorCount days until or since any date, see 100-day and anniversary dates, add days to a date and measure the time between two dates.
- Discount & Percent CalculatorWork out sale prices, discount rates, original prices, percentages, percent change and 10% VAT by filling in simple sentences.
- Pyeong Converter (Korean Apartment Sizes)Convert pyeong and square meters, and estimate Korean listed apartment sizes (e.g. 84㎡ = 34-pyeong type) from the exclusive area.
- Unit ConverterConvert length, area, weight, volume, temperature, speed, data, time, pressure, energy and fuel economy, including Korean units.
- Number to Korean Won Amount (Hangul)Write amounts in Korean (일금 …원정), formal hanja numerals or English, and turn Korean amounts back into digits.
- QR Code GeneratorMake QR codes for URLs, text, Wi-Fi and contacts, and save as PNG or SVG.
- World Time ConverterCompare the time and time difference across cities like Seoul, New York and London, and find a good meeting time. Daylight saving handled automatically.
- Korean Server Time Clock (Ticketing & Course Signup)See the live server time of Naver, ticket sites, KORAIL, SRT and course sign-up sites down to the millisecond, with your PC clock offset and a countdown to the opening time.
- Download Time CalculatorEstimate download time from file size and internet speed. Converts Mbps and MB/s and accounts for real-world speed.
- Timer, Stopwatch & PomodoroA stopwatch with laps, a countdown timer and a Pomodoro timer in one screen. The time also shows in the tab title so you can check it from another window.
- BMI & BMR CalculatorCalculate body mass index (BMI), weight category, basal metabolic rate and daily calorie needs from height and weight, with both Korean (Asia-Pacific) and WHO standards.
- Due Date & Pregnancy Week CalculatorCalculate your due date and current pregnancy week from your last period, conception date, IVF transfer date or ultrasound dating, with a week-by-week date table.
- Korean Military Discharge Date CalculatorEnter your enlistment date and service type to get your discharge date, days left, progress and promotion dates (Army, Marines, Navy, Air Force, social service).
- GPA Calculator (4.5 / 4.3 / 4.0)Calculate semester and cumulative GPA from course credits and grades. Supports 4.5, 4.3 and 4.0 scales, major/elective GPA, scale conversion and the average you need to reach a target.
- Korean Electricity Bill CalculatorEstimate your Korean residential electricity bill from monthly kWh with the progressive tiers, summer (Jul–Aug) rates, distance to the next tier and an appliance-based usage estimate.