Focused collection · 6 tools
Free online calculators for everyday decisions
Start with the decision you need to make. These calculators run in the browser, expose their inputs, and link directly to the relevant method or result.
6 tools
Free Online Calculators 6
General and Scientific Calculator
Use a fast general calculator or switch on scientific functions for trigonometry, logarithms, powers, roots, memory, and calculation history.
Percentage Calculator
Calculate percentages, increases, and changes instantly.
Unit Converter
Convert common units instantly across length, area, weight, temperature, volume, speed, and pressure.
Date Difference Calculator
Calculate elapsed years, months, weeks, and days between two dates.
Hours and Minutes Calculator
Add or subtract hours and minutes and show decimal-hour equivalents.
Sales Tax and VAT Calculator
Add or remove sales tax or VAT using an editable rate.
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| Tool | Use it when you need to |
|---|---|
| General and Scientific Calculator | Use a fast general calculator or switch on scientific functions for trigonometry, logarithms, powers, roots, memory, and calculation history. |
| Percentage Calculator | Calculate percentages, increases, and changes instantly. |
| Unit Converter | Convert common units instantly across length, area, weight, temperature, volume, speed, and pressure. |
| Date Difference Calculator | Calculate elapsed years, months, weeks, and days between two dates. |
| Hours and Minutes Calculator | Add or subtract hours and minutes and show decimal-hour equivalents. |
| Sales Tax and VAT Calculator | Add or remove sales tax or VAT using an editable rate. |