Powers of 10 & Metric SI Prefix Chart
Powers of 10 and SI prefixes make very large and very small numbers easy to write. This chart lists each power from 10−30 to 1030 with scientific notation, prefix name and symbol, plus a converter and 182 examples.
milli (m)0.0011 × 10−3
base unit11 × 100
kilo (k)1,0001 × 103
mega (M)1,000,0001 × 106
giga (G)1,000,000,0001 × 109
tera (T)1,000,000,000,0001 × 1012
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Tip: open this page with ?exp=6 (-30 to 30) to start with that exponent and its chart row highlighted.
| Power (10^n) | Scientific Notation | Standard Value | Prefix Name | Symbol | Copy |
|---|---|---|---|---|---|
| 10−30 | 1 × 10−30 | 0.000000000000000000000000000001 | quecto | q | |
| 10−27 | 1 × 10−27 | 0.000000000000000000000000001 | ronto | r | |
| 10−24 | 1 × 10−24 | 0.000000000000000000000001 | yocto | y | |
| 10−21 | 1 × 10−21 | 0.000000000000000000001 | zepto | z | |
| 10−18 | 1 × 10−18 | 0.000000000000000001 | atto | a | |
| 10−15 | 1 × 10−15 | 0.000000000000001 | femto | f | |
| 10−12 | 1 × 10−12 | 0.000000000001 | pico | p | |
| 10−9 | 1 × 10−9 | 0.000000001 | nano | n | |
| 10−6 | 1 × 10−6 | 0.000001 | micro | µ | |
| 10−3 | 1 × 10−3 | 0.001 | milli | m | |
| 10−2 | 1 × 10−2 | 0.01 | centi | c | |
| 10−1 | 1 × 10−1 | 0.1 | deci | d | |
| 100 | 1 × 100 | 1 | base unit | - | |
| 101 | 1 × 101 | 10 | deca | da | |
| 102 | 1 × 102 | 100 | hecto | h | |
| 103 | 1 × 103 | 1,000 | kilo | k | |
| 106 | 1 × 106 | 1,000,000 | mega | M | |
| 109 | 1 × 109 | 1,000,000,000 | giga | G | |
| 1012 | 1 × 1012 | 1,000,000,000,000 | tera | T | |
| 1015 | 1 × 1015 | 1,000,000,000,000,000 | peta | P | |
| 1018 | 1 × 1018 | 1,000,000,000,000,000,000 | exa | E | |
| 1021 | 1 × 1021 | 1,000,000,000,000,000,000,000 | zetta | Z | |
| 1024 | 1 × 1024 | 1,000,000,000,000,000,000,000,000 | yotta | Y | |
| 1027 | 1 × 1027 | 1,000,000,000,000,000,000,000,000,000 | ronna | R | |
| 1030 | 1 × 1030 | 1,000,000,000,000,000,000,000,000,000,000 | quetta | Q |
182 Searchable Solved Examples
| Type | Question | Worked Solution | Answer | Copy |
|---|---|---|---|---|
| To Scientific | Write 45,000 in scientific notation. | 45,000 = 4.5 × 104 (move the decimal point 4 places left) | 4.5 × 104 | |
| To Scientific | Write 300,000 in scientific notation. | 300,000 = 3 × 105 (move the decimal point 5 places left) | 3 × 105 | |
| To Scientific | Write 6,500,000 in scientific notation. | 6,500,000 = 6.5 × 106 (move the decimal point 6 places left) | 6.5 × 106 | |
| To Scientific | Write 72 in scientific notation. | 72 = 7.2 × 101 (move the decimal point 1 place left) | 7.2 × 101 | |
| To Scientific | Write 890 in scientific notation. | 890 = 8.9 × 102 (move the decimal point 2 places left) | 8.9 × 102 | |
| To Scientific | Write 1,200,000,000 in scientific notation. | 1,200,000,000 = 1.2 × 109 (move the decimal point 9 places left) | 1.2 × 109 | |
| To Scientific | Write 2,500 in scientific notation. | 2,500 = 2.5 × 103 (move the decimal point 3 places left) | 2.5 × 103 | |
| To Scientific | Write 15,000 in scientific notation. | 15,000 = 1.5 × 104 (move the decimal point 4 places left) | 1.5 × 104 | |
| To Scientific | Write 730,000 in scientific notation. | 730,000 = 7.3 × 105 (move the decimal point 5 places left) | 7.3 × 105 | |
| To Scientific | Write 88,000,000 in scientific notation. | 88,000,000 = 8.8 × 107 (move the decimal point 7 places left) | 8.8 × 107 | |
| To Scientific | Write 1,000,000,000 in scientific notation. | 1,000,000,000 = 1 × 109 (move the decimal point 9 places left) | 1 × 109 | |
| To Scientific | Write 0.5 in scientific notation. | 0.5 = 5 × 10−1 (move the decimal point 1 place right) | 5 × 10−1 | |
| To Scientific | Write 0.03 in scientific notation. | 0.03 = 3 × 10−2 (move the decimal point 2 places right) | 3 × 10−2 | |
| To Scientific | Write 0.0042 in scientific notation. | 0.0042 = 4.2 × 10−3 (move the decimal point 3 places right) | 4.2 × 10−3 | |
| To Scientific | Write 0.000075 in scientific notation. | 0.000075 = 7.5 × 10−5 (move the decimal point 5 places right) | 7.5 × 10−5 | |
| To Scientific | Write 0.00000089 in scientific notation. | 0.00000089 = 8.9 × 10−7 (move the decimal point 7 places right) | 8.9 × 10−7 | |
| To Scientific | Write 0.2 in scientific notation. | 0.2 = 2 × 10−1 (move the decimal point 1 place right) | 2 × 10−1 | |
| To Scientific | Write 0.0008 in scientific notation. | 0.0008 = 8 × 10−4 (move the decimal point 4 places right) | 8 × 10−4 | |
| To Scientific | Write 0.0000031 in scientific notation. | 0.0000031 = 3.1 × 10−6 (move the decimal point 6 places right) | 3.1 × 10−6 | |
| To Scientific | Write 0.065 in scientific notation. | 0.065 = 6.5 × 10−2 (move the decimal point 2 places right) | 6.5 × 10−2 | |
| To Scientific | Write 0.000000001 in scientific notation. | 0.000000001 = 1 × 10−9 (move the decimal point 9 places right) | 1 × 10−9 | |
| To Scientific | Write 0.0125 in scientific notation. | 0.0125 = 1.25 × 10−2 (move the decimal point 2 places right) | 1.25 × 10−2 | |
| To Scientific | Write 150,000,000 in scientific notation. | 150,000,000 = 1.5 × 108 (move the decimal point 8 places left) | 1.5 × 108 | |
| To Scientific | Write 299,792,458 in scientific notation. | 299,792,458 = 2.99792458 × 108 (move the decimal point 8 places left) | 2.99792458 × 108 | |
| To Scientific | Write 0.00000000667 in scientific notation. | 0.00000000667 = 6.67 × 10−9 (move the decimal point 9 places right) | 6.67 × 10−9 | |
| To Scientific | Write 4,200 in scientific notation. | 4,200 = 4.2 × 103 (move the decimal point 3 places left) | 4.2 × 103 | |
| To Scientific | Write 96,000 in scientific notation. | 96,000 = 9.6 × 104 (move the decimal point 4 places left) | 9.6 × 104 | |
| To Scientific | Write 0.7 in scientific notation. | 0.7 = 7 × 10−1 (move the decimal point 1 place right) | 7 × 10−1 | |
| To Scientific | Write 0.00091 in scientific notation. | 0.00091 = 9.1 × 10−4 (move the decimal point 4 places right) | 9.1 × 10−4 | |
| To Scientific | Write 35,000,000,000 in scientific notation. | 35,000,000,000 = 3.5 × 1010 (move the decimal point 10 places left) | 3.5 × 1010 | |
| To Standard | Write 3.2 × 105 as a standard number. | 105 = 100,000, so 3.2 × 105 = 3.2 × 100,000 = 320,000 | 320,000 | |
| To Standard | Write 4.5 × 103 as a standard number. | 103 = 1,000, so 4.5 × 103 = 4.5 × 1,000 = 4,500 | 4,500 | |
| To Standard | Write 6.02 × 102 as a standard number. | 102 = 100, so 6.02 × 102 = 6.02 × 100 = 602 | 602 | |
| To Standard | Write 7 × 106 as a standard number. | 106 = 1,000,000, so 7 × 106 = 7 × 1,000,000 = 7,000,000 | 7,000,000 | |
| To Standard | Write 1.5 × 10−2 as a standard number. | 10−2 = 0.01, so 1.5 × 10−2 = 1.5 × 0.01 = 0.015 | 0.015 | |
| To Standard | Write 2.5 × 10−4 as a standard number. | 10−4 = 0.0001, so 2.5 × 10−4 = 2.5 × 0.0001 = 0.00025 | 0.00025 | |
| To Standard | Write 9.1 × 10−3 as a standard number. | 10−3 = 0.001, so 9.1 × 10−3 = 9.1 × 0.001 = 0.0091 | 0.0091 | |
| To Standard | Write 8 × 109 as a standard number. | 109 = 1,000,000,000, so 8 × 109 = 8 × 1,000,000,000 = 8,000,000,000 | 8,000,000,000 | |
| To Standard | Write 1.2 × 107 as a standard number. | 107 = 10,000,000, so 1.2 × 107 = 1.2 × 10,000,000 = 12,000,000 | 12,000,000 | |
| To Standard | Write 5.6 × 10−5 as a standard number. | 10−5 = 0.00001, so 5.6 × 10−5 = 5.6 × 0.00001 = 0.000056 | 0.000056 | |
| To Standard | Write 3.4 × 1010 as a standard number. | 1010 = 10,000,000,000, so 3.4 × 1010 = 3.4 × 10,000,000,000 = 34,000,000,000 | 34,000,000,000 | |
| To Standard | Write 2 × 1012 as a standard number. | 1012 = 1,000,000,000,000, so 2 × 1012 = 2 × 1,000,000,000,000 = 2,000,000,000,000 | 2,000,000,000,000 | |
| To Standard | Write 1.6 × 10−6 as a standard number. | 10−6 = 0.000001, so 1.6 × 10−6 = 1.6 × 0.000001 = 0.0000016 | 0.0000016 | |
| To Standard | Write 4.2 × 10−8 as a standard number. | 10−8 = 0.00000001, so 4.2 × 10−8 = 4.2 × 0.00000001 = 0.000000042 | 0.000000042 | |
| To Standard | Write 7.8 × 104 as a standard number. | 104 = 10,000, so 7.8 × 104 = 7.8 × 10,000 = 78,000 | 78,000 | |
| To Standard | Write 9.99 × 103 as a standard number. | 103 = 1,000, so 9.99 × 103 = 9.99 × 1,000 = 9,990 | 9,990 | |
| To Standard | Write 1.01 × 105 as a standard number. | 105 = 100,000, so 1.01 × 105 = 1.01 × 100,000 = 101,000 | 101,000 | |
| To Standard | Write 6.7 × 10−1 as a standard number. | 10−1 = 0.1, so 6.7 × 10−1 = 6.7 × 0.1 = 0.67 | 0.67 | |
| To Standard | Write 5 × 10−9 as a standard number. | 10−9 = 0.000000001, so 5 × 10−9 = 5 × 0.000000001 = 0.000000005 | 0.000000005 | |
| To Standard | Write 1.38 × 10−3 as a standard number. | 10−3 = 0.001, so 1.38 × 10−3 = 1.38 × 0.001 = 0.00138 | 0.00138 | |
| To Standard | Write 2.998 × 108 as a standard number. | 108 = 100,000,000, so 2.998 × 108 = 2.998 × 100,000,000 = 299,800,000 | 299,800,000 | |
| To Standard | Write 6.626 × 10−3 as a standard number. | 10−3 = 0.001, so 6.626 × 10−3 = 6.626 × 0.001 = 0.006626 | 0.006626 | |
| To Standard | Write 4 × 1015 as a standard number. | 1015 = 1,000,000,000,000,000, so 4 × 1015 = 4 × 1,000,000,000,000,000 = 4,000,000,000,000,000 | 4,000,000,000,000,000 | |
| To Standard | Write 3.5 × 10−7 as a standard number. | 10−7 = 0.0000001, so 3.5 × 10−7 = 3.5 × 0.0000001 = 0.00000035 | 0.00000035 | |
| To Standard | Write 8.25 × 106 as a standard number. | 106 = 1,000,000, so 8.25 × 106 = 8.25 × 1,000,000 = 8,250,000 | 8,250,000 | |
| Prefix | Convert 5 km to m. | kilo is 103 and base unit is 100, so shift = 3 - (0) = 3: 5 × 103 = 5,000 m | 5,000 m | |
| Prefix | Convert 2.5 kg to g. | kilo is 103 and base unit is 100, so shift = 3 - (0) = 3: 2.5 × 103 = 2,500 g | 2,500 g | |
| Prefix | Convert 750 mL to L. | milli is 10−3 and base unit is 100, so shift = -3 - (0) = -3: 750 × 10−3 = 0.75 L | 0.75 L | |
| Prefix | Convert 1,500 mg to g. | milli is 10−3 and base unit is 100, so shift = -3 - (0) = -3: 1,500 × 10−3 = 1.5 g | 1.5 g | |
| Prefix | Convert 3 MW to kW. | mega is 106 and kilo is 103, so shift = 6 - (3) = 3: 3 × 103 = 3,000 kW | 3,000 kW | |
| Prefix | Convert 2 GHz to MHz. | giga is 109 and mega is 106, so shift = 9 - (6) = 3: 2 × 103 = 2,000 MHz | 2,000 MHz | |
| Prefix | Convert 4.7 GHz to kHz. | giga is 109 and kilo is 103, so shift = 9 - (3) = 6: 4.7 × 106 = 4,700,000 kHz | 4,700,000 kHz | |
| Prefix | Convert 1 TB to GB. | tera is 1012 and giga is 109, so shift = 12 - (9) = 3: 1 × 103 = 1,000 GB | 1,000 GB | |
| Prefix | Convert 0.5 TB to GB. | tera is 1012 and giga is 109, so shift = 12 - (9) = 3: 0.5 × 103 = 500 GB | 500 GB | |
| Prefix | Convert 250 GB to B. | giga is 109 and base unit is 100, so shift = 9 - (0) = 9: 250 × 109 = 250,000,000,000 B | 250,000,000,000 B | |
| Prefix | Convert 12 km to mm. | kilo is 103 and milli is 10−3, so shift = 3 - (-3) = 6: 12 × 106 = 12,000,000 mm | 12,000,000 mm | |
| Prefix | Convert 3 ms to µs. | milli is 10−3 and micro is 10−6, so shift = -3 - (-6) = 3: 3 × 103 = 3,000 µs | 3,000 µs | |
| Prefix | Convert 500 µm to mm. | micro is 10−6 and milli is 10−3, so shift = -6 - (-3) = -3: 500 × 10−3 = 0.5 mm | 0.5 mm | |
| Prefix | Convert 45 ns to µs. | nano is 10−9 and micro is 10−6, so shift = -9 - (-6) = -3: 45 × 10−3 = 0.045 µs | 0.045 µs | |
| Prefix | Convert 2 µs to ns. | micro is 10−6 and nano is 10−9, so shift = -6 - (-9) = 3: 2 × 103 = 2,000 ns | 2,000 ns | |
| Prefix | Convert 1 MHz to Hz. | mega is 106 and base unit is 100, so shift = 6 - (0) = 6: 1 × 106 = 1,000,000 Hz | 1,000,000 Hz | |
| Prefix | Convert 100 cm to m. | centi is 10−2 and base unit is 100, so shift = -2 - (0) = -2: 100 × 10−2 = 1 m | 1 m | |
| Prefix | Convert 5 cm to mm. | centi is 10−2 and milli is 10−3, so shift = -2 - (-3) = 1: 5 × 101 = 50 mm | 50 mm | |
| Prefix | Convert 250 mL to cL. | milli is 10−3 and centi is 10−2, so shift = -3 - (-2) = -1: 250 × 10−1 = 25 cL | 25 cL | |
| Prefix | Convert 0.001 kg to g. | kilo is 103 and base unit is 100, so shift = 3 - (0) = 3: 0.001 × 103 = 1 g | 1 g | |
| Prefix | Convert 8 GB to B. | giga is 109 and base unit is 100, so shift = 9 - (0) = 9: 8 × 109 = 8,000,000,000 B | 8,000,000,000 B | |
| Prefix | Convert 33 mV to V. | milli is 10−3 and base unit is 100, so shift = -3 - (0) = -3: 33 × 10−3 = 0.033 V | 0.033 V | |
| Prefix | Convert 9.8 mA to µA. | milli is 10−3 and micro is 10−6, so shift = -3 - (-6) = 3: 9.8 × 103 = 9,800 µA | 9,800 µA | |
| Prefix | Convert 101.3 kPa to Pa. | kilo is 103 and base unit is 100, so shift = 3 - (0) = 3: 101.3 × 103 = 101,300 Pa | 101,300 Pa | |
| Prefix | Convert 1.5 MJ to kJ. | mega is 106 and kilo is 103, so shift = 6 - (3) = 3: 1.5 × 103 = 1,500 kJ | 1,500 kJ | |
| Prefix | Convert 60 kW to W. | kilo is 103 and base unit is 100, so shift = 3 - (0) = 3: 60 × 103 = 60,000 W | 60,000 W | |
| Prefix | Convert 7 ps to ns. | pico is 10−12 and nano is 10−9, so shift = -12 - (-9) = -3: 7 × 10−3 = 0.007 ns | 0.007 ns | |
| Prefix | Convert 250 ps to s. | pico is 10−12 and base unit is 100, so shift = -12 - (0) = -12: 250 × 10−12 = 0.00000000025 s | 0.00000000025 s | |
| Prefix | Convert 3.6 MJ to J. | mega is 106 and base unit is 100, so shift = 6 - (0) = 6: 3.6 × 106 = 3,600,000 J | 3,600,000 J | |
| Prefix | Convert 2 PB to TB. | peta is 1015 and tera is 1012, so shift = 15 - (12) = 3: 2 × 103 = 2,000 TB | 2,000 TB | |
| Prefix | Convert 0.25 L to mL. | base unit is 100 and milli is 10−3, so shift = 0 - (-3) = 3: 0.25 × 103 = 250 mL | 250 mL | |
| Prefix | Convert 4 s to µs. | base unit is 100 and micro is 10−6, so shift = 0 - (-6) = 6: 4 × 106 = 4,000,000 µs | 4,000,000 µs | |
| Prefix | Convert 1,200 m to km. | base unit is 100 and kilo is 103, so shift = 0 - (3) = -3: 1,200 × 10−3 = 1.2 km | 1.2 km | |
| Prefix | Convert 15 hPa to Pa. | hecto is 102 and base unit is 100, so shift = 2 - (0) = 2: 15 × 102 = 1,500 Pa | 1,500 Pa | |
| Prefix | Convert 6 dam to m. | deca is 101 and base unit is 100, so shift = 1 - (0) = 1: 6 × 101 = 60 m | 60 m | |
| Prefix | Convert 40 dL to cL. | deci is 10−1 and centi is 10−2, so shift = -1 - (-2) = 1: 40 × 101 = 400 cL | 400 cL | |
| Rule | Simplify 105 × 103. | 105 × 103 = 108 (add the exponents: 5 + 3 = 8) | 108 | |
| Rule | Simplify 102 × 106. | 102 × 106 = 108 (add the exponents: 2 + 6 = 8) | 108 | |
| Rule | Simplify 107 × 104. | 107 × 104 = 1011 (add the exponents: 7 + 4 = 11) | 1011 | |
| Rule | Simplify 1010 × 102. | 1010 × 102 = 1012 (add the exponents: 10 + 2 = 12) | 1012 | |
| Rule | Simplify 109 × 109. | 109 × 109 = 1018 (add the exponents: 9 + 9 = 18) | 1018 | |
| Rule | Simplify 108 × 105. | 108 × 105 = 1013 (add the exponents: 8 + 5 = 13) | 1013 | |
| Rule | Simplify 103 × 1012. | 103 × 1012 = 1015 (add the exponents: 3 + 12 = 15) | 1015 | |
| Rule | Simplify 104 × 107. | 104 × 107 = 1011 (add the exponents: 4 + 7 = 11) | 1011 | |
| Rule | Simplify 106 × 106. | 106 × 106 = 1012 (add the exponents: 6 + 6 = 12) | 1012 | |
| Rule | Simplify 101 × 101. | 101 × 101 = 102 (add the exponents: 1 + 1 = 2) | 102 | |
| Rule | Simplify 107 ÷ 102. | 107 ÷ 102 = 105 (subtract the exponents: 7 - 2 = 5) | 105 | |
| Rule | Simplify 109 ÷ 103. | 109 ÷ 103 = 106 (subtract the exponents: 9 - 3 = 6) | 106 | |
| Rule | Simplify 106 ÷ 106. | 106 ÷ 106 = 100 (subtract the exponents: 6 - 6 = 0) | 100 | |
| Rule | Simplify 1012 ÷ 105. | 1012 ÷ 105 = 107 (subtract the exponents: 12 - 5 = 7) | 107 | |
| Rule | Simplify 108 ÷ 101. | 108 ÷ 101 = 107 (subtract the exponents: 8 - 1 = 7) | 107 | |
| Rule | Simplify 1010 ÷ 104. | 1010 ÷ 104 = 106 (subtract the exponents: 10 - 4 = 6) | 106 | |
| Rule | Simplify 105 ÷ 107. | 105 ÷ 107 = 10−2 (subtract the exponents: 5 - 7 = -2) | 10−2 | |
| Rule | Simplify 103 ÷ 109. | 103 ÷ 109 = 10−6 (subtract the exponents: 3 - 9 = -6) | 10−6 | |
| Rule | Simplify (103)2. | (103)2 = 106 (multiply the exponents: 3 × 2 = 6) | 106 | |
| Rule | Simplify (102)4. | (102)4 = 108 (multiply the exponents: 2 × 4 = 8) | 108 | |
| Rule | Simplify (105)3. | (105)3 = 1015 (multiply the exponents: 5 × 3 = 15) | 1015 | |
| Rule | Simplify (104)2. | (104)2 = 108 (multiply the exponents: 4 × 2 = 8) | 108 | |
| Rule | Simplify (106)3. | (106)3 = 1018 (multiply the exponents: 6 × 3 = 18) | 1018 | |
| Rule | Simplify (102)6. | (102)6 = 1012 (multiply the exponents: 2 × 6 = 12) | 1012 | |
| Rule | Write 1 ÷ 102 as a power of 10. | 1 ÷ 102 = 10−2 = 0.01 | 10−2 | |
| Rule | Write 1 ÷ 103 as a power of 10. | 1 ÷ 103 = 10−3 = 0.001 | 10−3 | |
| Rule | Write 1 ÷ 104 as a power of 10. | 1 ÷ 104 = 10−4 = 0.0001 | 10−4 | |
| Rule | Write 1 ÷ 106 as a power of 10. | 1 ÷ 106 = 10−6 = 0.000001 | 10−6 | |
| Rule | Write 1 ÷ 109 as a power of 10. | 1 ÷ 109 = 10−9 = 0.000000001 | 10−9 | |
| Rule | Multiply (2 × 103) × (3 × 104). | 2 × 3 = 6; 103 × 104 = 107; so 6 × 107 = 6 × 107 | 6 × 107 | |
| Rule | Multiply (4 × 105) × (5 × 102). | 4 × 5 = 20; 105 × 102 = 107; so 20 × 107 = 2 × 108 | 2 × 108 | |
| Rule | Multiply (6 × 10−2) × (2 × 107). | 6 × 2 = 12; 10−2 × 107 = 105; so 12 × 105 = 1.2 × 106 | 1.2 × 106 | |
| Rule | Multiply (1.5 × 104) × (4 × 103). | 1.5 × 4 = 6; 104 × 103 = 107; so 6 × 107 = 6 × 107 | 6 × 107 | |
| Rule | Multiply (9 × 106) × (8 × 10−3). | 9 × 8 = 72; 106 × 10−3 = 103; so 72 × 103 = 7.2 × 104 | 7.2 × 104 | |
| Rule | Multiply (3 × 10−5) × (3 × 10−4). | 3 × 3 = 9; 10−5 × 10−4 = 10−9; so 9 × 10−9 = 9 × 10−9 | 9 × 10−9 | |
| Rule | Multiply (2.5 × 108) × (4 × 102). | 2.5 × 4 = 10; 108 × 102 = 1010; so 10 × 1010 = 1 × 1011 | 1 × 1011 | |
| Rule | Multiply (5 × 1010) × (5 × 10−3). | 5 × 5 = 25; 1010 × 10−3 = 107; so 25 × 107 = 2.5 × 108 | 2.5 × 108 | |
| Rule | Divide (6 × 108) ÷ (2 × 103). | 6 ÷ 2 = 3; 108 ÷ 103 = 105; so 3 × 105 = 3 × 105 | 3 × 105 | |
| Rule | Divide (9 × 105) ÷ (3 × 102). | 9 ÷ 3 = 3; 105 ÷ 102 = 103; so 3 × 103 = 3 × 103 | 3 × 103 | |
| Rule | Divide (8 × 10−2) ÷ (4 × 103). | 8 ÷ 4 = 2; 10−2 ÷ 103 = 10−5; so 2 × 10−5 = 2 × 10−5 | 2 × 10−5 | |
| Rule | Divide (7.5 × 109) ÷ (2.5 × 104). | 7.5 ÷ 2.5 = 3; 109 ÷ 104 = 105; so 3 × 105 = 3 × 105 | 3 × 105 | |
| Rule | Divide (1 × 106) ÷ (4 × 10−2). | 1 ÷ 4 = 0.25; 106 ÷ 10−2 = 108; so 0.25 × 108 = 2.5 × 107 | 2.5 × 107 | |
| Rule | Divide (9 × 103) ÷ (3 × 10−4). | 9 ÷ 3 = 3; 103 ÷ 10−4 = 107; so 3 × 107 = 3 × 107 | 3 × 107 | |
| Name | What is the SI prefix for 10−30? | 10−30 = 0.000000000000000000000000000001 = quecto | quecto (q) | |
| Name | What power of 10 is quecto (q)? | quecto = 0.000000000000000000000000000001 = 10−30 | 10−30 | |
| Name | What is the SI prefix for 10−27? | 10−27 = 0.000000000000000000000000001 = ronto | ronto (r) | |
| Name | What power of 10 is ronto (r)? | ronto = 0.000000000000000000000000001 = 10−27 | 10−27 | |
| Name | What is the SI prefix for 10−24? | 10−24 = 0.000000000000000000000001 = yocto | yocto (y) | |
| Name | What power of 10 is yocto (y)? | yocto = 0.000000000000000000000001 = 10−24 | 10−24 | |
| Name | What is the SI prefix for 10−21? | 10−21 = 0.000000000000000000001 = zepto | zepto (z) | |
| Name | What power of 10 is zepto (z)? | zepto = 0.000000000000000000001 = 10−21 | 10−21 | |
| Name | What is the SI prefix for 10−18? | 10−18 = 0.000000000000000001 = atto | atto (a) | |
| Name | What power of 10 is atto (a)? | atto = 0.000000000000000001 = 10−18 | 10−18 | |
| Name | What is the SI prefix for 10−15? | 10−15 = 0.000000000000001 = femto | femto (f) | |
| Name | What power of 10 is femto (f)? | femto = 0.000000000000001 = 10−15 | 10−15 | |
| Name | What is the SI prefix for 10−12? | 10−12 = 0.000000000001 = pico | pico (p) | |
| Name | What power of 10 is pico (p)? | pico = 0.000000000001 = 10−12 | 10−12 | |
| Name | What is the SI prefix for 10−9? | 10−9 = 0.000000001 = nano | nano (n) | |
| Name | What power of 10 is nano (n)? | nano = 0.000000001 = 10−9 | 10−9 | |
| Name | What is the SI prefix for 10−6? | 10−6 = 0.000001 = micro | micro (µ) | |
| Name | What power of 10 is micro (µ)? | micro = 0.000001 = 10−6 | 10−6 | |
| Name | What is the SI prefix for 10−3? | 10−3 = 0.001 = milli | milli (m) | |
| Name | What power of 10 is milli (m)? | milli = 0.001 = 10−3 | 10−3 | |
| Name | What is the SI prefix for 10−2? | 10−2 = 0.01 = centi | centi (c) | |
| Name | What power of 10 is centi (c)? | centi = 0.01 = 10−2 | 10−2 | |
| Name | What is the SI prefix for 10−1? | 10−1 = 0.1 = deci | deci (d) | |
| Name | What power of 10 is deci (d)? | deci = 0.1 = 10−1 | 10−1 | |
| Name | What is the SI prefix for 101? | 101 = 10 = deca | deca (da) | |
| Name | What power of 10 is deca (da)? | deca = 10 = 101 | 101 | |
| Name | What is the SI prefix for 102? | 102 = 100 = hecto | hecto (h) | |
| Name | What power of 10 is hecto (h)? | hecto = 100 = 102 | 102 | |
| Name | What is the SI prefix for 103? | 103 = 1,000 = kilo | kilo (k) | |
| Name | What power of 10 is kilo (k)? | kilo = 1,000 = 103 | 103 | |
| Name | What is the SI prefix for 106? | 106 = 1,000,000 = mega | mega (M) | |
| Name | What power of 10 is mega (M)? | mega = 1,000,000 = 106 | 106 | |
| Name | What is the SI prefix for 109? | 109 = 1,000,000,000 = giga | giga (G) | |
| Name | What power of 10 is giga (G)? | giga = 1,000,000,000 = 109 | 109 | |
| Name | What is the SI prefix for 1012? | 1012 = 1,000,000,000,000 = tera | tera (T) | |
| Name | What power of 10 is tera (T)? | tera = 1,000,000,000,000 = 1012 | 1012 | |
| Name | What is the SI prefix for 1015? | 1015 = 1,000,000,000,000,000 = peta | peta (P) | |
| Name | What power of 10 is peta (P)? | peta = 1,000,000,000,000,000 = 1015 | 1015 | |
| Name | What is the SI prefix for 1018? | 1018 = 1,000,000,000,000,000,000 = exa | exa (E) | |
| Name | What power of 10 is exa (E)? | exa = 1,000,000,000,000,000,000 = 1018 | 1018 | |
| Name | What is the SI prefix for 1021? | 1021 = 1,000,000,000,000,000,000,000 = zetta | zetta (Z) | |
| Name | What power of 10 is zetta (Z)? | zetta = 1,000,000,000,000,000,000,000 = 1021 | 1021 | |
| Name | What is the SI prefix for 1024? | 1024 = 1,000,000,000,000,000,000,000,000 = yotta | yotta (Y) | |
| Name | What power of 10 is yotta (Y)? | yotta = 1,000,000,000,000,000,000,000,000 = 1024 | 1024 | |
| Name | What is the SI prefix for 1027? | 1027 = 1,000,000,000,000,000,000,000,000,000 = ronna | ronna (R) | |
| Name | What power of 10 is ronna (R)? | ronna = 1,000,000,000,000,000,000,000,000,000 = 1027 | 1027 | |
| Name | What is the SI prefix for 1030? | 1030 = 1,000,000,000,000,000,000,000,000,000,000 = quetta | quetta (Q) | |
| Name | What power of 10 is quetta (Q)? | quetta = 1,000,000,000,000,000,000,000,000,000,000 = 1030 | 1030 |
No examples match your search. Try a prefix name such as kilo or a number such as 1000.
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Frequently Asked Questions
| Question | Answer |
|---|---|
| What does the prefix milli mean? | Milli means 10−3, or 0.001 (one thousandth). For example, 1 millimetre = 0.001 metres and 1 mL = 0.001 L. |
| What is the difference between kilo, mega and giga? | Kilo is 103 = 1,000, mega is 106 = 1,000,000 and giga is 109 = 1,000,000,000. Each step up is a factor of 1,000. |
| How do you write 0.00045 in scientific notation? | Move the decimal point 4 places to the right to get 4.5, so 0.00045 = 4.5 × 10−4. A negative exponent means the number is smaller than 1. |
| How do you convert kilometres to metres? | Kilo is 103, so multiply by 1,000: 5 km = 5 × 1,000 = 5,000 m. To go the other way, divide by 1,000. |
| What are the newest SI prefixes? | In 2022 the CGPM added ronna (R, 1027), quetta (Q, 1030), ronto (r, 10−27) and quecto (q, 10−30). They are the largest and smallest official prefixes. |
| How do you multiply and divide powers of 10? | To multiply, add the exponents: 105 × 103 = 108. To divide, subtract them: 107 ÷ 102 = 105. For a power of a power, multiply the exponents: (103)2 = 106. |