Age Calculator, Basic Calculator, Scientific Calculator — all free, browser-based, no signup required.
Calculator Toolkit — All Tools100% Browser-Based
Age Calculator
Compute exact age in years, months, days, hours, and minutes
Basic Calculator
Add, subtract, multiply, divide with percentage and sign toggle
Scientific Calculator
Trig, logarithms, powers, roots, constants π and e, and more
Age Calculator
Basic Calculator
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Scientific CalculatorDEG
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How to Use Calculator Tools
Enter your date of birth and optionally a target date. Click "Use Today" for instant current age. Results show years, months, days, hours, and total days.
Works like a standard calculator. Supports chained operations, percentage, and +/− toggle. Keyboard shortcuts are also supported (digits, operators, Enter for =).
Use trig functions (sin, cos, tan), logarithms, powers (xʸ), square roots, factorial (n!), and constants π and e. Toggle between DEG and RAD modes for trig.