Converter tools
Unit Converter
Convert length, weight, temp, volume.
Currency Converter
Convert currencies with live rates.
Age Calculator
Find exact age in years, months, and days.
Percentage Calculator
Find a percentage, increase/decrease, or add/subtract %.
Grade Calculator
Calculate a weighted average grade.
Time Duration Calculator
Find elapsed time between two clock times.
Common uses
- Converting a recipe measurement between metric and imperial units
- Checking an approximate currency conversion while traveling or shopping online
- Converting a temperature reading between Celsius and Fahrenheit
How to choose
The split between the two converters here is simple: the Unit Converter handles physical quantities — length, weight, temperature, and volume — using fixed conversion factors that never change (a mile is always 1.60934 kilometers). The Currency Converter is fundamentally different because exchange rates move constantly; it pulls from a public rate feed updated roughly daily, which is fine for budgeting a trip or estimating a purchase but not precise enough for time-sensitive trading or invoicing decisions where you need a live, licensed data feed. If you need to convert a recipe or a body measurement, use the Unit Converter; if you're converting money, treat the Currency Converter's output as a same-day estimate rather than an exact quote.
Both converters share the same design principle as the rest of the site: the math happens in your browser, so there's no delay waiting on a server round-trip for something as simple as converting inches to centimeters. The Currency Converter is the one exception that needs any network activity at all, since exchange rates by definition have to come from somewhere outside your device — everything else about the calculation, including rounding and display, happens locally.
Frequently asked questions
Rates are pulled from a public exchange-rate API roughly once a day — suitable for general reference, not real-time trading decisions.
Yes — length, weight, and volume conversions use standard SI-based conversion factors; temperature conversions correctly handle Celsius, Fahrenheit, and Kelvin's different zero points.