Toolkit — Free Online Calculators: Loan, BMI, Age, Date, Unit & Currency (2026)

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💰 Finance · 5

Loan Interest CalculatorSimulate equal principal and interest repayment

Currency ConverterConvert currencies with real-time exchange rates

Discount & Sales Tax CalculatorSale price, stacked discounts and tax in one step

Compound Interest CalculatorSavings growth with monthly deposits and tax

Tip CalculatorTip amount, total and split per person

💚 Health · 4

Age CalculatorCalculate international and Korean age at once

BMI CalculatorCheck your body mass index and weight category

Due Date CalculatorEstimate due date from your last period

Calorie CalculatorCalculate BMR and daily calorie needs

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📅 Date · 7

D-Day CalculatorCount the days remaining until a specific date

Date Difference CalculatorCalculate days, months, and years between two dates

Public Holiday LookupBrowse public holidays by year

Hijri to Gregorian ConverterConvert Islamic (Umm al-Qura) and Gregorian dates

Lunar Calendar ConverterConvert Gregorian and Chinese lunar dates, zodiac

Time & Hours CalculatorHours between times, add time, total hours

Calendar Year ConverterGregorian to Japanese era, Minguo, Buddhist year

✍️ Text · 1

Character CounterCount characters, bytes, with or without spaces

🔄 Convert · 3

Area ConverterConvert between pyeong, m², and ft²

Unit ConverterConvert length, weight, temperature, and speed

Percentage CalculatorX% of Y, percent change, increase and decrease

💻 Dev · 6

QR Code GeneratorInstantly turn URLs and text into QR codes

JSON FormatterIndent, validate, and minify JSON

Base64 ConverterEncode and decode text to Base64

Color ConverterConvert HEX, RGB, and HSL color values

Password GeneratorGenerate secure passwords with custom options

Random Number GeneratorRandom integers in a range, unique or with repeats