Found this on the net, very clever.


You can weigh the boat with a regular household scale using simple math and physics.

1. First put the scale under the tongue with the boat pulled all the way up on the trailer. For me the scale read 150lbs so W1=150

2. scoot the boat back on the trailer EXACTLY 10" so 10=X

3. reweight the tongue. For me it was 100lbs so W2=100

4. measure the distance in inches from the axle to the tip of the tongue. For me it was 180". so 180=C

5. Plug all 4 of your numbers into the equation. C(W1-W2)/X


Mine looked like this... 180(150-100)/10

6. do the equation
a. first you subtract 100 from 150 which = 50
b. then you multiply 50 by 180 which= 9000
c. finally you divide 9000 by 10 which = 900

So my boat weighs 900 lbs. It will only take you about 5-10 minutes to do.

You must have a big mouth, or small scales. I couldn't fit my scales under my tongue, no matter how hard I tried.

I'm going to weigh my boat & trailer using a variation on that method KK.
Measure the hitch weight then jack the trailer up a measured distance behind the axle then recheck the hitch weight.
Just have to be careful not to blow up the bathroom scales.

i find that hard to believe kk,,jas

You've got the heavy duty scales eh KK?

Yes, the talking ones. They still give cheek though. I step on them and they say 'one at a time please'

Big Bleck wuns

He peels them off the Luddyfush & glues them to his body
Only 25% there by my estimate judging by his last pic

Needs more luddyfush me tinks