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Forum topic by daddywoofdawg posted 06-28-2015 02:41 PM 2797 views 0 times favorited 131 replies Add to Favorites Watch
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1029 posts in 2383 days

06-28-2015 02:41 PM

I was in school before jimmy carter tried to make the us metric,but do to the internet I’m finding more metric measurements;So I’m going to get a tape with metric on it.
Here is my question,In the photo is the big red numbers on the bottom MM or CM? ,is the small marks on the bottom then one MM each?

131 replies so far

View lateralus819's profile


2243 posts in 2698 days

#1 posted 06-28-2015 02:46 PM

The large numbers are CM yes. The small dashes are MM.

View johnstoneb's profile


3147 posts in 2981 days

#2 posted 06-28-2015 02:46 PM

there are 10 mm to a cm. The numbers are centimeters.
The metric system is based on tens
1000 mm to a meter
10mm to a cm
100 cm to a meter
A rough conversion approximately 2.5 cm to an inch.

-- Bruce, Boise, ID

View MarcusM's profile


57 posts in 3788 days

#3 posted 06-28-2015 02:48 PM

The red is CM, the black is MM.

-- Tilbilly Mark

View Texcaster's profile


1292 posts in 2482 days

#4 posted 06-28-2015 03:22 PM

Most of the trades in Australia work in mm. and / or metres, cm. are not used.

Ex : a kitchen benchtop is 900mm high, a passage door is 2100mm or 2.1m. high. Dual metric / imperial tapes can’t be read from both sides. Timber is sold by the cube or M3

My wife used to be in the rag trade, she works in cm. We have a hard time communicating sometimes.

-- Mama calls me Texcaster but my real name is Mr. Earl.

View KeithP's profile


15 posts in 2046 days

#5 posted 06-28-2015 05:06 PM

Yes. Big red numbers are centimeters (cm), each small rule mark is a millimeter (mm).

The conversion rate is 2.54 cm:inch, aka 25.4mm:inch.

View JoeinGa's profile


7741 posts in 2815 days

#6 posted 06-28-2015 05:15 PM

So daddywoofdawg … Next time you’re calling out cutting measurements to somebody, you can holler
“Hey! Cut the next one 600 centimeters plus 4 of the little tiny marks!”

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View Beams37's profile


166 posts in 1998 days

#7 posted 06-28-2015 05:16 PM

As a vet, I learned a lot about the metric system in the military. I know this isn’t what you asked, but it is an amazingly easy system of measurement.

On a side note, where did you get the tape with both? I like that!

-- FNG ... On a quest for knowledge.

View Yonak's profile


986 posts in 2329 days

#8 posted 06-28-2015 07:41 PM

..Now, if only we could somehow get to a base 12 number system all would be rosy.

View TheDane's profile


5829 posts in 4471 days

#9 posted 06-28-2015 07:52 PM

Years ago (before I got into woodworking), I opposed switching to the metric system.

Now I wish we had!

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View kaerlighedsbamsen's profile


1343 posts in 2521 days

#10 posted 06-28-2015 08:17 PM

For the qurious here some more information:

-- "Do or Do not. There is no try." - Yoda

View robscastle's profile


7238 posts in 3012 days

#11 posted 06-28-2015 08:53 PM

From an Australian point of view.

The metric system (SI) was a great idea and upon its introduction cm were not prefered values.
However obviously nobody tried selling that or maybe even asking/telling that to the textile industry and “other” trades.

Once the metric system was introduced commissioned and set to work the board was disbanded and hence the cm were no longer a non prefered sub unit.

The USA being the USA did their own thing, and I guess will always do so (no ill intent infered here by the way)

I use the metric system in preference to the imperial system but have to by way of necessity and need of accuracy to be able to relate to both.

When I did my Engineering Metrology certificate it was all in metric however historicial measurements like the cubit, foot and inch etc were part of the course.

When you study atomic clocks and interferometry in measurement it all falls into place, you just have to keep your wits about you.

As for tape measures well they are back to front as well, we by way of convention read left to right, but try measuring that way!!

If you think thats all too confusing just wait until the introduction of metric time!

I think I hear my Table Saw calling !!

-- Regards Rob

View SirIrb's profile


1239 posts in 2039 days

#12 posted 06-28-2015 08:58 PM

I was in first grade after JC. So of course they taught standard and metric side by side. My dad almost killed me when I said something about a 16mm wrench. Because of the side by side learning I always thought of a cm as about a half inch. Thanks public education, you’re a bunch of jack holes. Yes, haha, I married a teacher. Yes, haha, she thinks quite the same as me.

-- Don't blame me, I voted for no one.

View BubbaIBA's profile


541 posts in 3185 days

#13 posted 06-28-2015 09:21 PM

Several years ago I converted my shop from imperial to metric. It was one of the smartest moves I’ve made in my shop. Measurement mistakes seldom happen when working metric and once you are use to thinking in metric there is much less time spent butt scratching and re-measuring.

The “yellow” FastCap ProCarpenter 16’ tape is Metric/Standard (FastCap’s term). It is a very good tape and can be handy during the transition from thinking imperial to thinking metric.

View distrbd's profile


2252 posts in 3254 days

#14 posted 06-28-2015 10:58 PM

Order your measuring tools from Canada,the funny thing is I order all my rules from the US , I like both sides in imperial system not half in cm and half in inches.

-- Ken from Ontario, Canada

View BurlyBob's profile


7713 posts in 3074 days

#15 posted 06-28-2015 11:30 PM

I was totally turned off by this thread when you mentioned Jimmy Carter. What a total waste. Thankfully Ronald Reagan saved the country till Obama came on the scene.

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