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Reference of Measurements in Halacha: Difference between revisions
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Reference of Measurements in Halacha (view source)
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==Kezayit== | ==Kezayit== | ||
# According to Ashkenazim, all sizes are measured in volume and not weight. <Ref> Mishna Brurah 456:3, Vezot HaBracha (pg 6) </ref>However, according to Sephardim the actual halacha is that measures are in volume but the minhag is to follow the measures in weight. <ref>Yalkut Yosef (Klalei Brachot pg 195-202) discusses this at length </ref> | # According to Ashkenazim, all sizes are measured in volume and not weight. <Ref> Mishna Brurah 456:3, Vezot HaBracha (pg 6) </ref>However, according to Sephardim the actual halacha is that measures are in volume but the minhag is to follow the measures in weight. <ref>Yalkut Yosef (Klalei Brachot pg 195-202) discusses this at length </ref> | ||
# There’s a dispute in the | # There’s a dispute in the Rishonim whether the [[Kezayit]] (olive size) is a half or third of a KeBeytzah (egg size), and the halacha follows the opinion that a Kezayit is half a KeBeytzah. <Ref>S”A 486 rules like Tosfot and not the Rambam that the Kezayit is half a Kebaytzah and not a third. </ref> | ||
# According to Rav Chaim Noeh, the Kezayit for Deoritta measures (eating Matzah) and Bracha Achrona is 25.6 cc (in volume). Nonetheless because food stuck in between one's teeth doesn't count towards a Kezayit eaten one should make sure to have 28.8 cc. Regarding a Kezayit for derabbanan measures (eating maror) the [[Kezayit]] is 17.3 cc. <ref>Shiurei Torah (by Rav Chaim Noeh, Siman 3 Seif 13 pg 191) </ref> The Chazon Ish’s opinion is that the Kezayit is 33.3 grams (1.3 oz). <ref>Vezot HaBracha (pg 6) </ref> See further on the [[Shiur of | # According to Rav Chaim Noeh, the Kezayit for Deoritta measures (eating Matzah) and Bracha Achrona is 25.6 cc (in volume). Nonetheless because food stuck in between one's teeth doesn't count towards a Kezayit eaten one should make sure to have 28.8 cc. Regarding a Kezayit for derabbanan measures (eating maror) the [[Kezayit]] is 17.3 cc. <ref>Shiurei Torah (by Rav Chaim Noeh, Siman 3 Seif 13 pg 191) </ref> The Chazon Ish’s opinion is that the Kezayit is 33.3 grams (1.3 oz). <ref>Vezot HaBracha (pg 6) </ref> See further on the [[Shiur of K'zayis]] page. | ||
# The minhag of the world and many other authorities is to follow Rav Chaim Noeh’s opinion. <Ref> Vezot HaBracha (pg 6, Birur 1, pg 221) in name of Rav Elyashiv and Rav Shlomo Zalman that one may follow Rav Chaim Noeh’s opinion and there’s no need to be strict for the Chazon Ish’s opinion. Vezot HaBracha also mentions that such is the minhag of the world. </ref> | # The minhag of the world and many other authorities is to follow Rav Chaim Noeh’s opinion. <Ref> Vezot HaBracha (pg 6, Birur 1, pg 221) in name of Rav Elyashiv and Rav Shlomo Zalman that one may follow Rav Chaim Noeh’s opinion and there’s no need to be strict for the Chazon Ish’s opinion. Vezot HaBracha also mentions that such is the minhag of the world. </ref> | ||
# If one ate between a third and a half a KeBaytzah one should not make a Bracha achrona because of safek Brachot. Therefore, one should have less than a third and not make a Bracha achrona or more than a half and make a Bracha achrona. <Ref> Mishna Brurah 486:1 </ref> | # If one ate between a third and a half a KeBaytzah one should not make a Bracha achrona because of safek Brachot. Therefore, one should have less than a third and not make a Bracha achrona or more than a half and make a Bracha achrona. <Ref> Mishna Brurah 486:1 </ref> | ||
# On | # On Mitzvot Deoritta such as eating Matzah one must be strict to hold a Kezayit is a half a Kebaytzah. However, regarding מצות Derabbanan it’s preferable to hold that a [[Kezayit]] is a half a kebaytzah, however, one may rely on the opinion that a [[Kezayit]] is a third a kebaytzah. <Ref> Mishna Brurah 486:1 </ref> | ||
==Kedi Achilat Pras== | ==Kedi Achilat Pras== | ||
# See [[Kedi Achilat Pras]] (the time in which a Kezayit is considered eaten together) | # See [[Kedi Achilat Pras]] (the time in which a Kezayit is considered eaten together) | ||
