Number Base Converter
FREEConvert numbers between binary, octal, decimal, and hexadecimal instantly.
0b
0o
0x
Type a number in any field and all bases update automatically.
ℹ️ About Number Base Converter
Number Base Converter is a free online converter from Tools Coaster. Convert numbers between binary, octal, decimal, and hexadecimal instantly. It runs entirely in your browser — no sign-up, no installs, and nothing you enter ever leaves your device.
📖 How to Use Number Base Converter
1
Enter a value
Type the number you want to convert.
2
Pick the units
Choose the unit to convert from and the unit to convert to.
3
Let Number Base Converter convert
The converted value appears instantly — no button needed.
4
Copy the result
Copy the precise converted value for your work.
💡 Examples
Unit conversion
INPUT
1 (from unit)→
OUTPUT
Converted value (to unit)🚀 Pro Tips
✓Very large and very small values display in scientific notation.
✓Everything runs locally in your browser — your input is never uploaded to a server, so it is safe for private or sensitive data.
✓Bookmark it — conversions come up constantly in cooking, travel, and science.
✓Full precision is shown — round to the decimal places your use case needs.
✓Remember handy benchmarks: 1 kg ≈ 2.2 lb, 1 mile ≈ 1.6 km.