Decimal / Percent / Fraction Converter
Enter a decimal, percent, or fraction and convert it to the other formats instantly. Results are simplified and shown with clear steps.
Supported inputs: decimals (1.25), percents (12.5%), fractions (3/4), mixed numbers (2 1/3), negatives. If using percent, “%” is optional when Input type is “Percent”.
Privacy: runs locally in your browser. No inputs are stored or transmitted.
How it works
Conversions are computed from an internal exact fraction representation (numerator/denominator) whenever possible, then displayed as: decimal (rounded for display), percent, and simplified fraction/mixed number.
- Decimal → Percent: decimal × 100
- Percent → Decimal: percent ÷ 100
- Decimal → Fraction: move decimal digits into an integer over 10^k, then simplify
- Fraction → Decimal/Percent: numerator ÷ denominator, then × 100 for percent
Examples
- 0.75 → 75% → 3/4
- 12.5% → 0.125 → 1/8
- 1 1/2 → 1.5 → 150%
- -0.2 → -20% → -1/5
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
FAQ
- What can this converter convert?
It converts between decimals, percentages, and fractions (including mixed numbers). You can enter one format and get the other two.
- Does it simplify fractions automatically?
Yes. Fraction results are reduced to lowest terms using GCD. Mixed-number form is also shown when the absolute value is at least 1.
- How does decimal to fraction conversion work?
A decimal with k digits after the decimal point is converted to an integer over 10^k, then simplified (e.g., 1.25 = 125/100 = 5/4).
- How does percent conversion work?
Percent means “per 100”. Converting decimal → percent multiplies by 100, and percent → decimal divides by 100.
- Are my inputs stored?
No. Everything runs locally in your browser and inputs are not stored or transmitted.