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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 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> | # 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 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> | |||
# 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> | |||
==KeBaytzah== | |||
# According to Rav Chaim Noeh, the KeBaytzah is 55cc and according to the Chazon Ish is 100cc. <ref>Vezot HaBracha pg 6 </ref> | |||
==Kedi Achilat Pras== | ==Kedi Achilat Pras== | ||
# According to Rav Chaim Noeh, the Kedi Achilat Pras is 4 minutes for measuring eatings for a mitzvah or bracha Achrona, however regarding a sick person eating in intervals on Yom Kippur the Kedi Achilat Pras should be measured as 9 minutes. <ref>Shiurei Torah (by Rav Chaim Noeh, Siman 3 Seif 15 pg 203) </ref> | # According to Rav Chaim Noeh, the Kedi Achilat Pras is 4 minutes for measuring eatings for a mitzvah or bracha Achrona, however regarding a sick person eating in intervals on Yom Kippur the Kedi Achilat Pras should be measured as 9 minutes. <ref>Shiurei Torah (by Rav Chaim Noeh, Siman 3 Seif 15 pg 203) </ref> | ||
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# According to the Chazon Ish, the Amah is 24 inches (60.96 centimeters), the Tefach is 4 inches (10.16 centimeters), and the Etzbah is 1 inch (2.54 centimeters). <ref> Shiurin shel Torah (pg 3) by the Steipler quoting the Chazon Ish but admitting that these are approximate measures because of the need to publicize the measures but not an accurate calculation. </ref> | # According to the Chazon Ish, the Amah is 24 inches (60.96 centimeters), the Tefach is 4 inches (10.16 centimeters), and the Etzbah is 1 inch (2.54 centimeters). <ref> Shiurin shel Torah (pg 3) by the Steipler quoting the Chazon Ish but admitting that these are approximate measures because of the need to publicize the measures but not an accurate calculation. </ref> | ||
==How large is a Reviyit?== | |||
# A Reviyit is a Kebaytzah and a half. <Ref>Mishna Brurah 486:1 </ref> Therefore, according to Rav Chaim Noeh, the Reviyit is 86 grams (3 oz) and according to the Chazon Ish the Reviyit is 150 grams (5.3 oz). <ref>Vezot HaBracha (pg 6) </ref> | |||
==Practical applications== | |||
# 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 מצות 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> | |||
==References== | ==References== | ||
<references/> | <references/> | ||
