zepto
type: Thing
alternate name: z
description: prefix denoting 10 to the −21st power
additional property: PropertyValue
  property ID: P31
  value: SI prefix
additional property: PropertyValue
  property ID: P31
  value: UCUM prefix
additional property: PropertyValue
  property ID: P155
  value: yocto
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  value: 1991
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additional property: PropertyValue
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additional property: PropertyValue
  property ID: P1889
  value: zetta
additional property: PropertyValue
  property ID: P2534
  value: 10^{-21}
additional property: PropertyValue
  property ID: P3328
  value: zepto
additional property: PropertyValue
  property ID: P4342
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additional property: PropertyValue
  property ID: P4732
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additional property: PropertyValue
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  value: Zepto
additional property: PropertyValue
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additional property: PropertyValue
  property ID: P6781
  value: Definition:Metric_System/Scaling_Prefixes/zepto-
additional property: PropertyValue
  property ID: P7007
  value: "Zepto"
additional property: PropertyValue
  property ID: P7825
  value: z
additional property: PropertyValue
  property ID: P8313
  value: zepto-
additional property: PropertyValue
  property ID: P8855
  value: 112-02-19
additional property: PropertyValue
  property ID: P8885
  value: 젭토
additional property: PropertyValue
  property ID: P11514
  value: zepto-d5307c
additional property: PropertyValue
  property ID: P12946
  value: zepto
confidence:
  popularity graph score:
    score: 0.038
    score pct: 4
    tier: established
    components:
      sitelinks: 45
      sitelinks norm: 0.106
      unique citations: 3
      unique citations norm: 0.001
      monthly pageviews: 19
      monthly pageviews norm: 0.0
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  unique citations: 3
  monthly pageviews: 19
  yearly pageviews: 97
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  popularity:
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    max: 423
    pct: 10.6
    rank label: top 5%
  tier: established
claims:
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    value: Q131299
    source count: 1
    confidence: 0.2
    value label: SI prefix
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    value: Q83155725
    source count: 0
    confidence: 0.0
    value label: UCUM prefix
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    value: Q110823
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    value label: yocto
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    value: Q110817
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    value label: atto-
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    value: +1991-00-00T00:00:00Z
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    confidence: 0.2
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    value:
      amount: +0.000000000000000000001
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    value: Q110796
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    value label: zetta
  P2534:
    value: 10^{-21}
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    value: zepto
    source count: 0
    confidence: 0.0
  P4342:
    value: zepto
    source count: 0
    confidence: 0.0
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    value: Z06740
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    confidence: 0.0
  P5061:
    value:
      lang: mul
      text: z
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    confidence: 0.2
  P5064:
    value: Zepto
    source count: 0
    confidence: 0.0

value: Q8487137
source count: 0
confidence: 0.0
value label: WikiProject Mathematics

value: 2777978859
source count: 0
confidence: 0.0

value: Definition:Metric_System/Scaling_Prefixes/zepto-
source count: 0
confidence: 0.0

value: "Zepto"
source count: 0
confidence: 0.0

value: z
source count: 0
confidence: 0.0

value: zepto-
source count: 0
confidence: 0.0

value: 112-02-19
source count: 0
confidence: 0.0

value: 젭토
source count: 0
confidence: 0.0

value: zepto-d5307c
source count: 0
confidence: 0.0

value: zepto
source count: 0
confidence: 0.0

source: Freebase Data Dumps
stated in qid: Q15241312
pub year: 2013

source: ISO 80000-1:2009 Quantities and units—Part 1: General
stated in qid: Q26711930

wikidata id: Q110807
domain: si_prefix
level: standard
html url: https://4ort.xyz/entity/zepto-q110807
markdown url: https://4ort.xyz/entity/zepto-q110807.md
facts url summary: https://4ort.xyz/entity/zepto-q110807/facts.json
facts url standard: https://4ort.xyz/entity/zepto-q110807/facts.json
facts url full: https://4ort.xyz/entity/zepto-q110807/facts.json
data source: Wikidata (CC0 / public domain)
license: https://creativecommons.org/publicdomain/zero/1.0/
api version: v1
served at: 2026-08-24T09:15:50.261029Z
entity updated at: 2026-05-03T23:45:09.469384+00:00Z
entity created at: 2026-04-10T23:48:16.960637+00:00Z