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M2 Calibration Weight - 100 gram

My Weigh OIML Class M2
100 Gram Calibration Weight

Accuracy: +/- 16 mg

My Weigh OIML Class M2 Calibration Weight
"In A Nutshell"
MaterialChrome plated steel
ClassOIML M2
Tolerance+/- 16 mg (0.016 g)

Product Details

This OIML Class M2 100 gram calibration weight has an accuracy of +/- 16 milligrams (0.016 grams). Use this calibration weight alone, or combine it with more weights to accurately calibrate your digital weighing scale.

Product Questions

Number of questions: 0

Product Reviews

Overall Customer Rating:
from 29 customer reviews.
Recommended weight for calibration.
Your weight appears to be a much higher quality than all the other ones I researched.
Reviewed by: Calibration weight from on 12/13/2020
200 gram weight
I needed a 200 gram weight. Found this one and all my scales show that it is exactly 200 grams. Works great
Thank you
Reviewed by: Chuck from Idaho on 5/27/2019
100 gram
order 100 gram weight... But received a 50 gram weight instead
Reviewed by: Rich Roth from on 11/24/2017
The plug fell out and the "bbs" were lose. I could not get them to balance at 100 grams by putting them back in. One must have been lost in the packing. The plug would not stay in. I have other weights to equal this so it wasn't worth my effort to return.
Reviewed by: Jeff Hamann from SACRAMENTO on 9/4/2017
Great Calibration Weight
I had a 100g calibration scale from before, but found out my scale needs 2 of them to calibrate. Since discovering Old Will Knott, I would not by these type of products anywhere else. This one and the other one, weigh the same on my .01 gram scale, so that is encouraging. I was able to calibrate my scale, everything arrived timely and in excellent condition. The problem with Superstore websites, is you don't always get what is pictured or you think you are getting. Also in this case the price was more than double and even with free shipping it came out higher.
Reviewed by: Levonster from on 8/14/2017
100 gram calibration weight
Nice packaging nice looking calibration weights however it is off by .237 being that I am disabled and have to accurately weigh some medications it is a hassle to do the math to make sure my doses wait regiments I have also tested this product that I have purchased on 5 other 100g micro scales and a Triple Beam scale and they all agree that this calibration weight is off within a tolerance of .237 and .2 41 I kind of found that undesirable but overall looks good and reasonably priced I just wished it was a little bit more accurate
Reviewed by: Me2 from on 5/25/2017
Good luck with your product for 10 yrs
Reviewed by: Wgn77 from on 5/8/2017
Awesome service
This Product was delivered quickly, but the shipping envelope tore in shipping, and the product was lost. I contacted Customer service, and they re-shipped the product and it was here in just a couple days. I would recommend this company to anyone. The product itself was exactly as advertised, and was less expensive than lower quality ones elsewhere. I am very happy.
Reviewed by: Mark Boyle from Janesville, WI on 1/12/2016
Perfect weight
Exactly as described! Fast shipping , everything was perfect!
Reviewed by: Steven from WV on 12/28/2015
Product is better then described and shown. I ordered 2 M2 Calibration Weights @100g. Both were very precise and accurate.
Reviewed by: David from Wheeling, IL on 11/9/2015
Fast Shipping
Had my order in my mailbox the same day I received a shipping notification! Worked great to calibrate my digital scale
Reviewed by: Michelle from New Orleans, LA on 6/25/2015
Shipped fast and was as described. Worked perfect to cal my scales.
Reviewed by: Daren from Oregon on 2/8/2015
Arrived with bottom plate off and weight fallen out
The 100g weight has a small circular plate on the bottom and inside is a ball-bearing which adds about a gram. When the order arrived, the plate was off, and the bearing was floating around inside the plastic bag. Not a big deal as I just used a dab of superglue to re-attach it. Also, not a big deal because OldWillKnott gave it to me for free (I asked about calibrating my scale and they recommended a 500 and 100 weight which I ordered, but turns out I had an older model which only needed the 500. Thus they kindly just credited me the amount for the 100g saving me the trouble to ship it back.) 4 stars for a combination of great service and an easy to resolve problem despite the quality issue.
Reviewed by: Vel Natarajan from Chicagoland on 1/28/2015
100 gram weight
This weight works great fantastic company to buy from
Reviewed by: josef deeble from vermont on 12/1/2014
M2 Calibration Weight - 100 gram
Service was grate and product was shipped fast. I got my order the next day. Very happy with the product and I would order from here in the future.
Reviewed by: Richard M. Brown from Springfield, MO. on 6/6/2014
M2 100 Gram Weight
I purchased this with my scale in order to check it for accuracy periodically. I also purchased the 200 gram calibration weight, in case I need to re-calibrate. Glad I purchased both with my scale, it is nice to have them if needed, and to test the scale periodically.
Reviewed by: trans from Michigan on 3/11/2014
As described
Wanted to know how accurate a new digital scale was that is supposed to have a +/-1 gram tolerance. Ordered this test weight and it comes up as 99 grams so either the test weight is off by 1 gram or my scale is but either way it is within tolerance.
Reviewed by: Adam W from Houston, TX on 11/5/2013
all around perfect
Excellent product, very low price, and fast delivery. Couldn't ask for more!
Reviewed by: Jay from washington, dc on 9/17/2013
Fast Shipping and Perfect Condition!
Reviewed by: Jamie from 219 West 4th Street apt.4 on 8/19/2013
Cal.wt and Scales
I purchased the JS-300V pocket scales first, and use it at least twice everyday to measure coffee,I also use it for other projects,it is very accurate and easy to use,I liked it so much I bought a second one which is the model JSR300 for backup or maybe a gift.I got the 100g cal wt. this order and checked both scales,no problem.Thanks for the great scales and super fast great service.
Reviewed by: obNwv from West Virginia on 8/12/2013
Pocket scale and calibration weight
This company is by far the most customer service oriented I've dealt with on the web. The products are excellent and the prices are right. Shipping could not be better. I will do business again with this company and I highly recommend them to everyone.
Reviewed by: Zach from Virginia on 6/3/2013
Excellent Product -- Amazing Service
The 100g calibration weight is exactly what I wanted and the service was more than I expected. I placed my order on a Tuesday and the package arrived on Friday. Unfortunately, the package had been shredded during shipping. I called the help line and, at no charge, they sent me another. I can certainly recommend doing business with Old Will Knot
Reviewed by: Daniel Williams from Enumclaw WA on 1/27/2013
100 gram weight
I ordered the 100 gram weight when I bought my jewelry scale. Both products were delivered super fast even during the holiday season. Using this weight I can easily prove to myself an scale is measuring correctly.
Reviewed by: JCD from NH on 1/12/2013
Excellant Service
Website Very Friendly, Great Price, Fast Shipping.....Very Happy.... Will Be Back...... Thank You.....
Reviewed by: John from New Jersey on 12/17/2012
Spot On
This is exactly as expected. No surprises here...
Reviewed by: shawn from Los Angeles on 11/2/2012
M2 Calibration Weight - 100 gram
I bought this scale for my husband. He loves it. Easy to use and accurate. Shipping was so fast, and the customer service is excellent.
Reviewed by: Elaine Cooper from Portland OR on 6/28/2012
Excellent product and almost instant delivery!
I was amazed how fast my scale and calibration weight arrived! The scale is very high quality and very simple to use. . . . .5 Stars all the way!
Reviewed by: Mason Colbert from Cary, NC on 4/1/2012
100 gram weight
Great product and quick shipping
Reviewed by: Greg from Parma OH on 12/27/2011
All was as it should be. and was here in No time thx
Reviewed by: Bruce Crafts from Davison Michigan on 12/5/2011

We know you have a choice when you buy scales online. Just know that when you buy digital scales from Old Will, it's always a "Worry Free Deal".

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