All calculators
⚖️ BMI Calculator
Body mass index from height and weight, metric or imperial, with healthy range.
％ Percentage Calculator
What is X% of Y, percentage of a total, and percent change.
🏠 Loan Calculator
Monthly payment, total interest and payoff for any loan or mortgage.
📈 Compound Interest
Watch savings grow with monthly contributions and compounding.
🎂 Age Calculator
Exact age in years, months and days — plus days until your next birthday.
🧾 Tip Calculator
Tip amount and per-person split for any bill.
📏 Unit Converter
Length, weight, temperature and volume conversions in one tool.
Why CalculatorWorks
Every tool here loads instantly and works offline once the page is open. There are no accounts, no uploads and no "premium" walls — the math runs entirely on your device, so your numbers stay yours.