5 free online tools
Calculators
Simple calculators with clear explanations of the formulas behind every result.
BMI Calculator
Calculate body mass index in metric or imperial units.
Open toolRandom Number Generator
Draw random numbers in any range, with or without repeats.
Open toolDice Roller
Roll any number of dice with any number of sides.
Open toolAge Calculator
Work out an exact age in years, months and days.
Open toolPercentage Calculator
Every common percentage calculation in one place.
Open tool Category Overview & Feature Comparison
About Calculators
The Calculators collection provides browser-based utilities designed for high performance, local data processing, and complete privacy. Every tool operates entirely within your browser - no server uploads, no watermarks, and no signups required.
| Tool Name | Key Functionality | Client-Side Processing | Usage Limit |
|---|---|---|---|
| BMI Calculator | Calculate body mass index in metric or imperial units. | 100% Local | Unlimited / Free |
| Random Number Generator | Draw random numbers in any range, with or without repeats. | 100% Local | Unlimited / Free |
| Dice Roller | Roll any number of dice with any number of sides. | 100% Local | Unlimited / Free |
| Age Calculator | Work out an exact age in years, months and days. | 100% Local | Unlimited / Free |
| Percentage Calculator | Every common percentage calculation in one place. | 100% Local | Unlimited / Free |