How to Use a Line Level to Calculate Grade, Slope 

Good coverage of how to find 2% slope, but also noteworthy that when the bubble is right tight to one side of one of the inside lines (not centered between them), that is a 1% slope, which is useful for things like laying pavers

Yes! After about 2 hours of searching, I find a video that shows the rise/run. Thank you, sir.

Man if they just taught me it this way in school I might of learned something! Thank you well done!

it’s so much easier for me to understand this stuff when i can apply it to real world circumstances that apply to me. in high school all i saw were numbers on a piece of paper and a clock on the wall.

Great video. Your real world application makes this so much easier to learn the supporting mathematics. Thank you!

Thank you for using it in the real world. I understand it so much better.

Nice job.....clear and concise presentation.

I don’t use this just but I sure will now that I know. Thank you very much. It’s simple and straight forward.

You sound just like Dale from king of the hill and it's awesome.

thanks for the refresher. don't use it, lose it.

Best explanation I've heard. Nice job

You are a great teacher ! Keep up the good work!

Excellent video!!

Great video brother this exactly how my land is .. Thank you for sharing 👍

Thank you for time and efforts

Great lesson Colfax! When I worked sewer and water we would use a laser for grade but we would check our pipe with a 4’ level. If the bubble was just touching the line we would know it was close to a .40 grade. We would have to figure the percentage. We would shoot the high point and low point.(example) If the high point was 25.24 and low point was 29.66 in a 300’ run, we would use the calculation 29.66-25.24=4.42 4.42/300=.01473 X100=1.473 and that would be the number we put on our laser since it recognizes 100’ incriminates. It is gets to be a lot of other configurations when checking the staking since the survey crew works off of sea level elevation.

I really appreciate your video you saved me 900 bucks lol 😆 god bless you

thank you

In my teaching I wasn't told about the 1/4 line in the level . Thanx great video

Wow! I have a hard time with math but you made it a bit easier. I am getting ready to buy my first property. And maybe last. But one side of the property is flat and the other is more rolling hills. Your equation will help. Thanks!

They sell 10 level bubbles in a little glass jar you can pick it up at the hardware store

Where did the intro music come from? Did you make it yourself?

I didn't have enough string so I had to do it 2 different times. I placed 3 stakes in ground in a straight line 20ft apart from each other. Stake #1 to Stake #2 came out to 7%. Then I put the string at the bottom of the 2nd stake and connected it to the top of the 3rd stake. That was 21.6%. So now do I combine the two percentages for 28.6% and divide by 2? Or is the total slope 28.6%?

👍🏾👍🏾👍🏾👍🏾👍🏾

Couldn’t you just use a laser to get your grade? Is this just for math teaching? I enjoy your teaching very much. Wish I had you as my math teacher.

👍🏻

Would the 9% grade be equivalent to degrees?

I want to use this but need reference

Why is 26.6 = 26.5 feet

Is that not snake in the background