# Greatest Common Factor Calculator

Calculate the **greatest common factor (GCF)** or greatest common divisor (gcd). On the GCF calculalation page you can learn how to calculate GCF step by step.

Please type two integer numbers and hit calculate button find the GCF of two numbers.

### GCF Calculations

Here are some examples of GCF calculations.

- GCF of 12 and 18
- GCF of 16 and 24
- GCF of 20 and 28
- GCF of 24 and 36
- GCF of 40 and 48
- GCF of 24 and 100
- GCF of 8 and 30
- GCF of 9 and 13
- GCF of 28 and 49
- GCF of 74 and 92
- GCF of 30 and 37
- GCF of 48 and 170
- GCF of 90 and 98
- GCF of 4 and 5
- GCF of 15 and 27
- GCF of 30 and 40
- GCF of 15 and 50
- GCF of 4 and 36
- GCF of 42 and 144
- GCF of 20 and 45
- GCF of 36 and 8
- GCF of 45 and 51
- GCF of 72 and 81
- GCF of 8 and 27
- GCF of 56 and 71
- GCF of 20 and 35
- GCF of 24 and 68
- GCF of 567 and 3572
- GCF of 12 and 10
- GCF of 64 and 96
- GCF of 48 and 180
- GCF of 45 and 75
- GCF of 9 and 30
- GCF of 24 and 40
- GCF of 28 and 140
- GCF of 6 and 9
- GCF of 50 and 65
- GCF of 14 and 38
- GCF of 28 and 70
- GCF of 10 and 16
- GCF of 32 and 128
- GCF of 12 and 40
- GCF of 12 and 27
- GCF of 135 and 140
- GCF of 12 and 15

## Recent Comments

this site is soooooo cool

Hi i need help with GCF which I know is easy but i just dont want to get it f=wrong but basically i need the GCF of 96,48, and 84 b Wes. could anybody help me?

make it optional to add letters to either of the factors, and it should equal something like this 18b + 30 = 6(3b+5). This would be helpful thank-you!!!

Thanks helped me but can u make one of the sections three slots?

Very helpful, helped with my math homework

BEST SITE EVER THANK YOU

we're past gcf now,,,, but def helped me on my tests

i like this, but could you add more numbers? It would be really helpful for 3 number problems. Thanks!

This is cool. I can get my answers for homework FAST

THIS IS GREAT FOR HOMEWORK

Itâ€™s good but they need to make it for there is 3 number places

This site is..... AWESOME!!!! I will now use this whenEVER I need math help!!! THANK YOU SO MUCH!!!!

Oops. I found the GCF part. Sorry for getting all worked up about that. Probably should have looked around the site a bit more first. Sorry!

I love this so much

i just searched and i saw this site, tried it out

now its the best math site of all

me too bless

This is so much better than doing it out on paper

these really helped me

why can't we add anymore numbers.

can we have 3 numbers please? otherwise very helpful