TetraKitsRatio Calculator
Reduce any ratio to its simplest form and see the decimal equivalent in one step. Enter two values — the calculator divides both by their GCF to give the lowest-term ratio plus a ÷ b as a decimal.
Read: Ratio Calculator Guide: Simplify Ratios to Lowest Terms →
- Free to Use
- No Signup
- Privacy Friendly
How to simplify a ratio
- 1
Enter a and b
Type the two parts of your ratio. Example: 12 and 8 represents the ratio 12:8.
- 2
Read simplified ratio
Both values divide by their GCF. 12:8 simplifies to 3:2 — the same proportion in lowest terms.
- 3
Check the decimal
The decimal column shows a ÷ b (3:2 → 1.5). For GCF/LCM of longer lists, use the GCF & LCM calculator.
Ratio simplification
A ratio a : b simplifies by dividing both terms by their GCF:
Example: 12 : 8 → 3 : 2 (decimal 1.5).
Why Use This Tool?
Lowest Terms
Automatically divides by the greatest common factor.
Decimal Output
See the ratio as a decimal for quick comparisons.
Recipe & Mix Ready
Scale ingredients and chemical mixtures proportionally.
Instant
Results update as you type.
Frequently Asked Questions
How do you simplify a ratio?
Divide both parts by their greatest common factor (GCF). 12:8 → GCF is 4 → 12÷4 : 8÷4 = 3:2.
Can ratios include decimals?
Yes. Enter decimal values; the calculator simplifies using the GCF of the numeric values.
What if b equals zero?
Division by zero is undefined. The decimal field shows infinity and the ratio cannot be simplified meaningfully.
What is the difference between ratio and fraction?
A ratio compares two quantities (3:2). A fraction represents a part of a whole (3/2 as an improper fraction). This tool shows both simplified ratio and decimal.
Is this ratio calculator free?
Yes. Free with unlimited use and no signup.
Lowest-Term Ratios in One Click
Recipe scaling, map scales, financial mix ratios, and exam questions all ask you to simplify proportions. Enter two numbers and get the reduced ratio plus decimal — no manual GCF work.
