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Calculators & life
D-Day Calculator
See exactly how many days remain until a special date.
CALCULATORS
Free Online Calculators
Calculate dates, salary, exchange rates, units, GPA, science formulas, and everyday values in your browser.
Free Online Calculators
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Calculators & life
Date & Weekday Calculator
Find the difference between dates, count weekdays and add days.
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Calculators & life
QR Code Maker & Reader
Create URL and Wi-Fi QR codes or read a QR image.
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Calculators & life
Official Exchange Rate Calculator
Convert currencies with ECB reference rates and compare their 90-day trend.
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Calculators & lifeSouth Korea rules
Salary, Severance & Leave
Estimate net salary, severance, weekly holiday pay and leave under South Korean 2026 rules.
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Calculators & life
Average Cost Calculator
Calculate the new average price, quantity and cost after another purchase.
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Calculators & life
Full Age Calculator
Calculate age from a birth date and reference date using the international birthday-based method.
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Calculators & lifeSouth Korea rules
Korean Military Discharge Date
Estimate a South Korean military discharge date from enlistment date and service months.
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Calculators & life
Discount & Deduction Calculator
Calculate coupon prices and estimated net amounts after a percentage deduction.
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Calculators & life
Everyday Unit Converter
Convert area, temperature, data, length and weight units instantly.
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Calculators & life
Scientific Calculator
Calculate trigonometric functions, logarithms, powers and factorials with memory and calculation history.
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Calculators & lifeKorean names
Korean Name Romanization Suggestions
Compare several Romanized spellings using common family-name forms and Revised Romanization.
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Calculators & life
GPA Converter
Convert between 4.3, 4.5, 4.0 and 100-point grading scales.
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Calculators & life
Random Place Nearby
Pick a random restaurant or cafe within your chosen radius.
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Calculators & life
Split Bill Calculator
Split first and second rounds and create a payment request message.
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Calculators & life
Sleep Cycle Calculator
Estimate good sleep and wake times using 90-minute sleep cycles.
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Calculators & life
Daily Water Intake Calculator
Estimate daily water needs from weight, activity, and climate.