Welcome to ToolsBoxes
Fast, lightweight web tools for calculations, conversions, and analysis. No sign-up is required, and most calculations stay in your browser.
Popular Tools
21 tools available
Every tool includes its method, assumptions, examples, and limitations so you can understand the result.
Explore all tools
Financial calculators
🏠 Mortgage calculator💰 Loan calculator
🏦 Savings calculator📈 Compound interest
💼 Investment calculator🎯 Retirement calculator
📊 ROI calculator💹 Break-even calculator
🧾 2026 federal tax estimator🧮 Percentage calculator
Everyday converters
🎂 Age and date calculator⚖️ BMI and BMR calculator
💱 Currency converter📏 Unit converter
🕒 Timezone and epoch converter
Developer tools
🧹 JSON formatter🧩 Base64 and URL encoding
🔑 UUID v4 generator🔣 Binary and hexadecimal converter
🔬 IEEE-754 converter🌐 IPv4 CIDR calculator
Transparent methods
ToolsBoxes publishes formulas, assumptions, examples, and sources alongside each calculator. Financial and health outputs are educational estimates; important decisions should be checked against official documents or a qualified professional.
Learn more about our calculation methodology, privacy practices, or report an issue.
© ToolsBoxes