Everyday, finance, date and IT calculators in one place
42 calculators
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💼 Pay & Work in Korea 9
Living or working in Korea? These calculators follow Korean law and rates.
Korea Weekly Holiday Pay Calculator (Juhyu Sudang)Paid weekly holiday allowance for part-timers in KoreaKorea Part-Time Monthly Pay CalculatorMonthly pay with weekly holiday allowance and 3.3% deductionKorea Hourly ↔ Monthly ↔ Annual Pay ConverterConvert wages using Korea's 209-hour monthKorea Social Insurance Calculator (4 Major Insurances)National pension, health, long-term care, employment insuranceKorea Year-End Tax Settlement Calculator (2026)Estimate your Korean year-end tax refundKorea Severance Pay CalculatorEstimate statutory severance pay in KoreaKorea Unemployment Benefit CalculatorDaily amount, number of days and total job-seeking allowanceKorea Parental Leave Benefit CalculatorMonthly parental leave pay in Korea (2026 rules)Korea Annual Leave CalculatorPaid annual leave days by years of service in Korea
🧮 Everyday 8
Online Scientific CalculatorType an expression: brackets, powers, roots, trigPercentage CalculatorPercent of, what percent, percent changeDiscount CalculatorSale price, percent off and stacked discountsUnit ConverterLength, weight, area, volume, temperature, speedTip & Bill Split CalculatorTip amount and each person's shareCharacter & Word CounterCharacters with/without spaces, words, bytesFuel Cost CalculatorTrip fuel cost from distance, mileage and priceRandom PickerRandom numbers, name draws and shuffling
📅 Date & Time 6
Age CalculatorExact age from date of birth, plus Korean age and zodiacD-Day Countdown CalculatorDays until an event or days since a dateSouth Korea Public Holidays 2027All 2027 Korean holidays, substitute holidays and long weekendsDate CalculatorDays between dates, add or subtract daysTime Zone ConverterConvert a time between world citiesJapanese Era Converter (Reiwa, Heisei, Showa)Western year ↔ Japanese era, Minguo and Dangi years
💰 Finance 6
Loan CalculatorMonthly payment, total interest and scheduleSavings & Deposit Interest CalculatorMaturity amount for monthly savings or lump sumsCompound Interest CalculatorGrowth of savings with monthly contributionsVAT / Sales Tax CalculatorAdd or remove VAT, GST or consumption taxProfit Margin Calculator for Online SellersNet profit and margin after fees, shipping and adsAverage Down Calculator (Stock Average Cost)New average price after buying more, plus P/L
🏠 Real Estate 3
❤️ Health 3
💻 IT & Dev 5
Subnet Calculator (IPv4 CIDR)Network, broadcast, host range and subnettingNumber Base ConverterBinary, octal, decimal and hexadecimalUnix Timestamp ConverterEpoch seconds/milliseconds ↔ date and timeDownload Time CalculatorTransfer time from file size and bandwidthAspect Ratio & Resolution CalculatorRatio, resize keeping ratio, PPI and screen size
🎓 Study 2
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