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DIY Basics: How to Quickly Determine the Midpoint, FractionFree
Another idea: If the rounddown is 18 and roundup is 19, just skew the tape until it measures 20 diagonally, and mark at 10. If that's too strong an angle for the piece, you can always hold the tape so it measures 19, and mark at 9 1/2. This trick works great when you need to divide a piece into thirds or quarters or fifths or whatever, just by setting the diagonal so that you get a common divisor.
I was also going to espouse this method. I learned it from a Jimmy Diresta tips n tricks vid.
Why not buy drillbits and tape measures in mm's?
You've all got it wrong. Take another board of identical dimensions and mass, shave off even increments of board, and continously weight the shavving and the remaining board. Once the weight of the shaving and the remaining board are equal, you have reached the center of the board you started with. Then, either measure the remaining bard and transfer that measurment to the piece you want to cut, or simply lay the half sized piece on top of the piece needding cut and make a mark. Simple
As for those posting snotty remarks; really? Did your mama's not teach you anything? If you don't have anything nice to say.......
I'm a financial analyst and can reconcile billion dollar accounts to the penny. Ask me to measure something that's not 1/4, 1/2 or 3/4 and I can't figure it out. That's my husbands job. :)
You don't even need a tape measure.
But cubits are even hard to find the half of.
Faith? Baddum ching.
We like things to be more difficult.
From a manufacturing point of view this is never the case.
So stick to two references and just do the very very simple math ;)
http://www.amazon.com/LufkinHIVIZSelfCenteringMeasureL725SCT/dp/B002H6WFJY
http://www.pushstick.com/webview/midpoint.jpg