Universal Tools
Calculators that work everywhere, independent of local laws or regulations
Compound Interest Calculator
Calculate compound interest with growth visualization chart
UtilityBuddhist Era ↔ Christian Era Converter
Convert between Buddhist Era (BE) and Christian Era (CE) years
InvestmentInvestment Return Calculator
Calculate investment returns including dividends and capital growth
BusinessROI Calculator (Return on Investment)
Calculate return on investment for any business or investment project
InvestmentNet Worth Tracker
Track your assets and liabilities. Data saved locally in your browser.
BusinessFree Invoice Generator (PDF Export)
Create professional invoices for free. Export to PDF. No signup.
BusinessProfit Margin Calculator
Calculate gross margin, net margin, and markup percentage
BusinessBreak-Even Analysis Calculator
Calculate your business break-even point in units and revenue
BusinessMarkup Calculator
Calculate selling price from cost and desired markup percentage
BusinessCAC/LTV Calculator
Calculate Customer Acquisition Cost and Lifetime Value ratio
UtilityQR Code Generator (with Logo)
Generate QR codes for free with custom logo. Download as image.
UtilitySecure Password Generator
Generate strong, secure passwords with customizable length and format
UtilityUnit Converter (Kitchen & Construction)
Convert measurement units for cooking and construction
UtilityDate Calculator (Days Between Dates)
Calculate days between two dates or add/subtract days from a date
UtilityFree Resume Builder (PDF Export)
Build a professional resume for free. Choose templates. Export to PDF.
InvestmentSavings Goal Calculator
Calculate how much to save monthly or how long to reach your savings goal
UtilityPercentage Calculator
Calculate percentages: X% of Y, ratio, change, increase/decrease
BusinessDiscount & Sale Price Calculator
Calculate final price after discount. Supports stacked discounts and tax.
BusinessSalary Converter (Annual ↔ Hourly)
Convert salary between annual, monthly, biweekly, weekly, daily, and hourly rates