Ratio & fraction calculator
Simplify fractions and solve proportions
How it works
Simplify integer fractions, solve A:B = C:X, or add, subtract, multiply and divide fractions. A denominator or divisor must not be zero.
Example
2/4 + 3/8 = 7/8.
How to use
- Enter your values or choose a local file.
- Choose settings and run the tool.
- Review the result, then copy it or download the file.
Common questions
What rules does this tool use?
Simplify integer fractions, solve A:B = C:X, or add, subtract, multiply and divide fractions. A denominator or divisor must not be zero.
Are my inputs uploaded?
Calculations, texts and files are processed in this browser. The currency tool requests only currency codes from our server.
Free tool · Inputs processed locally · Updated October 5, 2026