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Metric Prefix Flashcards: All 24 SI Names, Symbols & Powers of Ten

Learn all 24 current SI prefixes with 72 flashcards for name, case-sensitive symbol, and power-of-ten recall.

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About this deck

These metric prefix flashcards cover all 24 SI prefixes currently recognized by NIST, from quetta at 10^30 to quecto at 10^-30. The 72 cards practice exactly three mappings for every prefix: name to case-sensitive symbol and power of ten; symbol to name and power of ten; and power of ten to name and case-sensitive symbol.

Case matters. M is mega while m is milli, and P/p, Z/z, Y/y, R/r, and Q/q also represent different prefixes. Each front labels the cue and requested mapping, so a bare symbol or exponent stays unambiguous on mixed-review and standalone surfaces. Each back starts with the answer.

The deterministic sequence begins with familiar metric prefixes, expands toward the extremes, and interleaves all three recall directions. Variants of the same prefix stay far apart, with at least three unrelated cards between them. Confusing uppercase and lowercase symbols are separated too.

This is a focused metric prefix quiz, not a full SI course. It excludes conversions, full decimal expansions, SI base and derived units, unit examples, pronunciation and spelling drills, IEC or binary prefixes, historical prefixes, and 10^0, which has no prefix. There are no card images.

The NIST Metric (SI) Prefixes page supplies the factual ledger. The prompts, answers, selection structure, metadata, sequence, and generated cover were independently authored; no NIST prose, examples, layout, or media were copied. Facts aren't claimed as proprietary. The original wording, organization, metadata, and cover are dedicated under CC0 1.0 to the extent applicable rights exist.

Independent study deck. Not affiliated with or endorsed by NIST.

Cards in this deck

  1. Card 1

    Question

    SI prefix name: kilo → case-sensitive symbol + power of ten

    Answer

    k

    10310^{3}

  2. Card 2

    Question

    SI prefix symbol (case-sensitive): M → name + power of ten

    Answer

    mega

    10610^{6}

  3. Card 3

    Question

    SI prefix power:

    10−210^{-2}

    → name + case-sensitive symbol

    Answer

    centi

    c

  4. Card 4

    Question

    SI prefix name: nano → case-sensitive symbol + power of ten

    Answer

    n

    10−910^{-9}

  5. Card 5

    Question

    SI prefix symbol (case-sensitive): h → name + power of ten

    Answer

    hecto

    10210^{2}

  6. Card 6

    Question

    SI prefix power:

    10−610^{-6}

    → name + case-sensitive symbol

    Answer

    micro

    μ

  7. Card 7

    Question

    SI prefix name: peta → case-sensitive symbol + power of ten

    Answer

    P

    101510^{15}

  8. Card 8

    Question

    SI prefix symbol (case-sensitive): d → name + power of ten

    Answer

    deci

    10−110^{-1}

  9. Card 9

    Question

    SI prefix power:

    10−310^{-3}

    → name + case-sensitive symbol

    Answer

    milli

    m

  10. Card 10

    Question

    SI prefix name: tera → case-sensitive symbol + power of ten

    Answer

    T

    101210^{12}

  11. Card 11

    Question

    SI prefix symbol (case-sensitive): p → name + power of ten

    Answer

    pico

    10−1210^{-12}

  12. Card 12

    Question

    SI prefix power:

    10110^{1}

    → name + case-sensitive symbol

    Answer

    deka

    da

  13. Card 13

    Question

    SI prefix name: giga → case-sensitive symbol + power of ten

    Answer

    G

    10910^{9}

  14. Card 14

    Question

    SI prefix symbol (case-sensitive): f → name + power of ten

    Answer

    femto

    10−1510^{-15}

  15. Card 15

    Question

    SI prefix power:

    101810^{18}

    → name + case-sensitive symbol

    Answer

    exa

    E

  16. Card 16

    Question

    SI prefix name: atto → case-sensitive symbol + power of ten

    Answer

    a

    10−1810^{-18}

  17. Card 17

    Question

    SI prefix symbol (case-sensitive): Z → name + power of ten

    Answer

    zetta

    102110^{21}

  18. Card 18

    Question

    SI prefix power:

    10−2410^{-24}

    → name + case-sensitive symbol

    Answer

    yocto

    y

  19. Card 19

    Question

    SI prefix name: ronna → case-sensitive symbol + power of ten

    Answer

    R

    102710^{27}

  20. Card 20

    Question

    SI prefix symbol (case-sensitive): q → name + power of ten

    Answer

    quecto

    10−3010^{-30}

  21. Card 21

    Question

    SI prefix power:

    10−2110^{-21}

    → name + case-sensitive symbol

    Answer

    zepto

    z

  22. Card 22

    Question

    SI prefix name: yotta → case-sensitive symbol + power of ten

    Answer

    Y

    102410^{24}

  23. Card 23

    Question

    SI prefix symbol (case-sensitive): r → name + power of ten

    Answer

    ronto

    10−2710^{-27}

  24. Card 24

    Question

    SI prefix power:

    103010^{30}

    → name + case-sensitive symbol

    Answer

    quetta

    Q

  25. Card 25

    Question

    SI prefix name: milli → case-sensitive symbol + power of ten

    Answer

    m

    10−310^{-3}

  26. Card 26

    Question

    SI prefix symbol (case-sensitive): k → name + power of ten

    Answer

    kilo

    10310^{3}

  27. Card 27

    Question

    SI prefix power:

    10210^{2}

    → name + case-sensitive symbol

    Answer

    hecto

    h

  28. Card 28

    Question

    SI prefix name: micro → case-sensitive symbol + power of ten

    Answer

    μ

    10−610^{-6}

  29. Card 29

    Question

    SI prefix symbol (case-sensitive): G → name + power of ten

    Answer

    giga

    10910^{9}

  30. Card 30

    Question

    SI prefix power:

    10−110^{-1}

    → name + case-sensitive symbol

    Answer

    deci

    d

  31. Card 31

    Question

    SI prefix name: centi → case-sensitive symbol + power of ten

    Answer

    c

    10−210^{-2}

  32. Card 32

    Question

    SI prefix symbol (case-sensitive): T → name + power of ten

    Answer

    tera

    101210^{12}

  33. Card 33

    Question

    SI prefix power:

    10610^{6}

    → name + case-sensitive symbol

    Answer

    mega

    M

  34. Card 34

    Question

    SI prefix name: deka → case-sensitive symbol + power of ten

    Answer

    da

    10110^{1}

  35. Card 35

    Question

    SI prefix symbol (case-sensitive): n → name + power of ten

    Answer

    nano

    10−910^{-9}

  36. Card 36

    Question

    SI prefix power:

    10−1210^{-12}

    → name + case-sensitive symbol

    Answer

    pico

    p

  37. Card 37

    Question

    SI prefix name: exa → case-sensitive symbol + power of ten

    Answer

    E

    101810^{18}

  38. Card 38

    Question

    SI prefix symbol (case-sensitive): a → name + power of ten

    Answer

    atto

    10−1810^{-18}

  39. Card 39

    Question

    SI prefix power:

    10−2710^{-27}

    → name + case-sensitive symbol

    Answer

    ronto

    r

  40. Card 40

    Question

    SI prefix name: yocto → case-sensitive symbol + power of ten

    Answer

    y

    10−2410^{-24}

  41. Card 41

    Question

    SI prefix symbol (case-sensitive): P → name + power of ten

    Answer

    peta

    101510^{15}

  42. Card 42

    Question

    SI prefix power:

    102110^{21}

    → name + case-sensitive symbol

    Answer

    zetta

    Z

  43. Card 43

    Question

    SI prefix name: quetta → case-sensitive symbol + power of ten

    Answer

    Q

    103010^{30}

  44. Card 44

    Question

    SI prefix symbol (case-sensitive): R → name + power of ten

    Answer

    ronna

    102710^{27}

  45. Card 45

    Question

    SI prefix power:

    10−1510^{-15}

    → name + case-sensitive symbol

    Answer

    femto

    f

  46. Card 46

    Question

    SI prefix name: zepto → case-sensitive symbol + power of ten

    Answer

    z

    10−2110^{-21}

  47. Card 47

    Question

    SI prefix symbol (case-sensitive): Y → name + power of ten

    Answer

    yotta

    102410^{24}

  48. Card 48

    Question

    SI prefix power:

    10−3010^{-30}

    → name + case-sensitive symbol

    Answer

    quecto

    q

  49. Card 49

    Question

    SI prefix name: mega → case-sensitive symbol + power of ten

    Answer

    M

    10610^{6}

  50. Card 50

    Question

    SI prefix symbol (case-sensitive): c → name + power of ten

    Answer

    centi

    10−210^{-2}

  51. Card 51

    Question

    SI prefix power:

    10310^{3}

    → name + case-sensitive symbol

    Answer

    kilo

    k

  52. Card 52

    Question

    SI prefix name: hecto → case-sensitive symbol + power of ten

    Answer

    h

    10210^{2}

  53. Card 53

    Question

    SI prefix symbol (case-sensitive): μ → name + power of ten

    Answer

    micro

    10−610^{-6}

  54. Card 54

    Question

    SI prefix power:

    10−910^{-9}

    → name + case-sensitive symbol

    Answer

    nano

    n

  55. Card 55

    Question

    SI prefix name: deci → case-sensitive symbol + power of ten

    Answer

    d

    10−110^{-1}

  56. Card 56

    Question

    SI prefix symbol (case-sensitive): m → name + power of ten

    Answer

    milli

    10−310^{-3}

  57. Card 57

    Question

    SI prefix power:

    10910^{9}

    → name + case-sensitive symbol

    Answer

    giga

    G

  58. Card 58

    Question

    SI prefix name: pico → case-sensitive symbol + power of ten

    Answer

    p

    10−1210^{-12}

  59. Card 59

    Question

    SI prefix symbol (case-sensitive): da → name + power of ten

    Answer

    deka

    10110^{1}

  60. Card 60

    Question

    SI prefix power:

    101210^{12}

    → name + case-sensitive symbol

    Answer

    tera

    T

  61. Card 61

    Question

    SI prefix name: quecto → case-sensitive symbol + power of ten

    Answer

    q

    10−3010^{-30}

  62. Card 62

    Question

    SI prefix symbol (case-sensitive): E → name + power of ten

    Answer

    exa

    101810^{18}

  63. Card 63

    Question

    SI prefix power:

    10−1810^{-18}

    → name + case-sensitive symbol

    Answer

    atto

    a

  64. Card 64

    Question

    SI prefix name: zetta → case-sensitive symbol + power of ten

    Answer

    Z

    102110^{21}

  65. Card 65

    Question

    SI prefix symbol (case-sensitive): y → name + power of ten

    Answer

    yocto

    10−2410^{-24}

  66. Card 66

    Question

    SI prefix power:

    101510^{15}

    → name + case-sensitive symbol

    Answer

    peta

    P

  67. Card 67

    Question

    SI prefix name: ronto → case-sensitive symbol + power of ten

    Answer

    r

    10−2710^{-27}

  68. Card 68

    Question

    SI prefix symbol (case-sensitive): Q → name + power of ten

    Answer

    quetta

    103010^{30}

  69. Card 69

    Question

    SI prefix power:

    102410^{24}

    → name + case-sensitive symbol

    Answer

    yotta

    Y

  70. Card 70

    Question

    SI prefix name: femto → case-sensitive symbol + power of ten

    Answer

    f

    10−1510^{-15}

  71. Card 71

    Question

    SI prefix symbol (case-sensitive): z → name + power of ten

    Answer

    zepto

    10−2110^{-21}

  72. Card 72

    Question

    SI prefix power:

    102710^{27}

    → name + case-sensitive symbol

    Answer

    ronna

    R

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72 cards

Metric Prefix Flashcards: All 24 SI Names, Symbols & Powers of Ten

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