Mixed Number Calculator
Convert and add mixed numbers.
Enter your values
Enter the whole 1 you are working with.
Enter the numerator 1 you are working with.
Enter the denominator 1 you are working with.
Enter the whole 2 you are working with.
Enter the numerator 2 you are working with.
Enter the denominator 2 you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Sum
- 4 7/12
- As improper fraction
- 55/12
- As decimal
- 4.583333
- First as improper
- 11/4
- Second as improper
- 11/6
Quick answer
A mixed number combines a whole number and a proper fraction; multiply the whole by the denominator and add the numerator to convert it.
a b/c = (ac + b)/c
At a glance
| What it does | Convert and add mixed numbers. |
|---|---|
| Category | Math |
| Inputs needed | Whole 1, Numerator 1, Denominator 1, Whole 2, Numerator 2, Denominator 2 |
| Main output | Sum |
| Formula | a b/c = (ac + b)/c |
| Cost | Free — no sign-up, no download |
How to use the Mixed Number Calculator
- 1Enter the whole part, numerator and denominator of each number.
- 2Read the simplified sum.
- 3Leave the second number at zero to just convert the first.
Inputs explained
- Whole 1
- Enter the whole 1 you are working with.
- Numerator 1
- Enter the numerator 1 you are working with.
- Denominator 1
- Enter the denominator 1 you are working with.
- Whole 2
- Enter the whole 2 you are working with.
- Numerator 2
- Enter the numerator 2 you are working with.
- Denominator 2
- Enter the denominator 2 you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Whole 12
- Numerator 13
- Denominator 14
- Whole 21
- Numerator 25
- Denominator 26
Results
- Sum4 7/12
- As improper fraction55/12
- As decimal4.583333
- First as improper11/4
- Second as improper11/6
Frequently asked questions
What is an improper fraction?
One where the numerator is larger than the denominator, like 11/4.
How do I subtract?
Enter the second numerator as a negative number.
What do I need to enter into the Mixed Number Calculator?
Just 6 values: whole 1, numerator 1, denominator 1, whole 2, numerator 2, denominator 2. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Mixed Number Calculator work out the answer?
A mixed number combines a whole number and a proper fraction; multiply the whole by the denominator and add the numerator to convert it. It applies the formula a b/c = (ac + b)/c and shows the working so you can check each step by hand.
Is the Mixed Number Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.