Converters
CalcNova’s converters change values from one unit, format, or system to another — metric lengths into imperial, decimals into scientific notation, numbers into binary, prices into other currencies, and times into other time zones. The homepage scientific calculator includes a currency mode, while the separate pages below each focus on one conversion job with the method explained. Everything runs free in your browser with no sign-up.
Unit and measurement converters
These converters handle the physical quantities and number formats used in school, work, and everyday life.
- Unit Converter — converts length, weight and mass, temperature, area, volume, and speed between metric and imperial units, showing the formula behind each result. The right starting point when a recipe, road sign, or weather report uses units you don’t think in.
- Scientific Notation Converter — changes decimals into scientific notation, E-notation, and engineering notation, and converts scientific notation back to plain decimals. Built for students and anyone working with very large or very small numbers in science classes.
- Base-N Converter — converts whole numbers between decimal, binary, octal, and hexadecimal, the four bases used most in computing. Useful for programming students and anyone learning how computers represent numbers.
- Roman Numeral Converter — converts numbers to Roman numerals and Roman numerals back to numbers, with the value of each symbol shown. Example: 2026 = MMXXVI.
- Temperature Converter — converts Celsius, Fahrenheit, and Kelvin in all directions, with formulas and a reference table. Example: 25 °C = 77 °F.
- Length Converter — converts miles, yards, feet, inches, kilometers, meters, centimeters, millimeters, nautical miles, light-years, points, and picas. Example: 5 km = 3.106855 miles.
- Data Storage Converter — converts bits, bytes, kilobytes, megabytes, gigabytes, and terabytes on the binary basis. Example: 2.5 GB = 2560 MB.
- HEX to RGB Converter — converts hex colour codes to RGB values and back, with a colour swatch. Example: #FF5733 = RGB 255, 87, 51.
Money and time converters
These converters deal with the two things that change depending on where you are: currency values and clock times.
- Currency Converter — a mode inside the homepage scientific calculator that converts amounts between world currencies. Open the homepage, switch to the currency mode, and enter an amount to see it in another currency.
- World Clock & Time Zone Converter — shows the current time around the world and converts a time in one zone to another, with a meeting planner for finding overlap. Made for scheduling calls across time zones and checking what time it is elsewhere.
Frequently asked questions
Which converter should I start with?
Start with the Unit Converter for everyday measurement changes, or the homepage currency mode for money. Move to a dedicated page when you need its specific output, such as binary digits or a time zone conversion.
Do I need an account to use these converters?
No. Every converter on this site runs free in your browser with no sign-up, no download, and no payment.
Are my numbers sent to a server?
No. All conversions happen in your own browser. Nothing you type is sent to a server or stored online. See the CalcNova FAQ for more on privacy.
Can I use these converters on my phone?
Yes. The converter pages adjust to smaller screens, so the tools work on phones and tablets as well as on a computer.