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To convert a measurement in ohms to a measurement in megaohms, divide the electrical resistance by the conversion ratio.
Since one megaohm is equal to 1,000,000 ohms, you can use this simple formula to convert:
megaohms = ohms ÷ 1,000,000
The electrical resistance in megaohms is equal to the electrical resistance in ohms divided by 1,000,000.
For example, here's how to convert 5,000,000 ohms to megaohms using the formula above.
megaohms = [5,000,000 Ω ÷ 1,000,000] = 5 MΩ
Ohms and megaohms are both units used to measure electrical resistance. Keep reading to learn more about each unit of measure.
What is an Ohm?
An ohm is the resistance between two points of an electrical conductor transmitting a current of one ampere when the electrical potential difference is one volt between the points.[1]
The ohm is the SI derived unit for electrical resistance in the metric system. Ohms can be abbreviated as Ω; for example, 1 ohm can be written as 1 Ω.
Ohm's Law
Ohm's Law states the current flowing between two points on a conductor is proportional to the voltage and inversely proportional to the resistance. More specifically, the current is equal to the voltage divided by the resistance.
Using Ohm's Law, it's possible to express the resistance in ohms as an expression using current and voltage.
RΩ = VV / IA
Here, the resistance R in ohms is equal to the potential difference V in volts divided by the current I in amperes.
Learn more about ohms.
What is a Megaohm?
One megaohm is equal to 1,000,000 ohms. A megaohm is the resistance across a conductor with an electrical potential difference of 1,000,000 volts with one ampere of current flowing through it.
The megaohm is a multiple of the ohm, which is the SI derived unit for electrical resistance. In the metric system, "mega" is the prefix for millions, or 106. Megaohms can be abbreviated as MΩ; for example, 1 megaohm can be written as 1 MΩ.
Ohm [phát âm tiếng Việt: Ôm], ký hiệu Ω, đơn vị đo điện trở R [X, Z] trong hệ SI, đặt tên theo nhà Vật lý Đức Georg Simon Ohm. Đơn vị Ohm xuất phát từ định luật Ohm.
Một Ohm là giá trị điện trở của vật khi đặt giữa hiệu điện thế 1 volt thì có dòng điện cường độ 1 ampere chạy qua.
R=1Ω=1V1A=1kg⋅m2s3⋅A2{\displaystyle R=1\Omega ={\frac {\mathrm {1V} }{\mathrm {1A} }}=1{\frac {\mathrm {kg} \cdot \mathrm {m} ^{2}}{\mathrm {s} ^{3}\cdot \mathrm {A} ^{2}}}}
Các tiền tố kết hợp với đơn vị ôm[sửa | sửa mã nguồn]
Tiền tốKết hợp với đơn vị ômGiá trịCách đọc bội sôYYΩ1 × 1024 ΩYôtaômZZΩ1 × 1021 ΩZêtaômEEΩ1 × 1018 ΩÊxaômPPΩ1 × 1015 ΩPêtaômTTΩ1 × 1012 ΩTêraômGGΩ1 × 109 ΩGigaômMMΩ1 × 106 ΩMêgaômkkΩ1 × 103 ΩkilôômhhΩ1 × 102 ΩhéctôômdadaΩ1 × 101 ΩđêcaômTiền tốKết hợp với đơn vị ômGiá trịCách đọc ước sôddΩ1 × 10−1 ΩđêxiômccΩ1 × 10−2 ΩxentiômmmΩ1 × 10−3 ΩmiliômμμΩ1 × 10−6 ΩmicrôômnnΩ1 × 10−9 ΩnanôômppΩ1 × 10−12 ΩpicôômffΩ1 × 10−15 ΩfemtôômaaΩ1 × 10−18 ΩatôômzzΩ1 × 10−21 ΩzeptôômyyΩ1 × 10−24 Ωyóctôôm
Bảng chuyển đổi giá trị giữa các ước số-bội số khác nhau[sửa | sửa mã nguồn]
Các bội số-ước sốYΩZΩEΩPΩTΩGΩMΩkΩhΩdaΩΩdΩcΩmΩμΩnΩpΩfΩaΩzΩyΩ1 YΩ11 × 1031 × 1061 × 1091 × 10121 × 10151 × 10181 × 10211 × 10221 × 10231 × 10241 × 10251 × 26261 × 10271 × 10301 × 10331 × 10361 × 10391 × 10421 × 10451 × 10481 ZΩ1 × 10−311 × 1031 × 1061 × 1091 × 10121 × 10151 × 10181 × 10191 × 10201 × 10211 × 10221 × 10231 × 26241 × 10271 × 10301 × 10331 × 10361 × 10391 × 10421 × 10451 EΩ1 × 10−61 × 10−311 × 1031 × 1061 × 1091 × 10121 × 10151 × 10161 × 10171 × 10181 × 10191 × 10201 × 10211 × 26241 × 10271 × 10301 × 10331 × 10361 × 10391 × 10421 PΩ1 × 10−91 × 10−61 × 10−311 × 1031 × 1061 × 1091 × 10121 × 10131 × 10141 × 10151 × 10161 × 10171 × 10181 × 10211 × 26241 × 10271 × 10301 × 10331 × 10361 × 10391 TΩ1 × 10−121 × 10−91 × 10−61 × 10−311 × 1031 × 1061 × 1091 × 10101 × 10111 × 10121 × 10131 × 10141 × 10151 × 10181 × 10211 × 26241 × 10271 × 10301 × 10331 × 10361 GΩ1 × 10−151 × 10−121 × 10−91 × 10−61 × 10−311 × 1031 × 1061 × 1071 × 1081 × 1091 × 10101 × 10111 × 10121 × 10151 × 10181 × 10211 × 26241 × 10271 × 10301 × 10331 MΩ1 × 10−181 × 10−151 × 10−121 × 10−91 × 10−61 × 10−311 × 1031 × 1041 × 1051 × 1061 × 1071 × 1081 × 1091 × 10121 × 10151 × 10181 × 10211 × 26241 × 10271 × 10301 kΩ1 × 10−211 × 10−181 × 10−151 × 10−121 × 10−91 × 10−61 × 10−311 × 1011 × 1021 × 1031 × 1041 × 1051 × 1061 × 1091 × 10121 × 10151 × 10181 × 10211 × 26241 × 10271 hΩ1 × 10−221 × 10−191 × 10−161 × 10−131 × 10−101 × 10−71 × 10−41 × 10−111 × 1011 × 1021 × 1031 × 1041 × 1051 × 1081 × 10111 × 10141 × 10171 × 10201 × 10231 × 10261 daΩ1 × 10−231 × 10−201 × 10−171 × 10−141 × 10−111 × 10−81 × 10−51 × 10−21 × 10−111 × 1011 × 1021 × 1031 × 1041 × 1071 × 10101 × 10131 × 10161 × 10191 × 10221 × 10251 Ω1 × 10−241 × 10−211 × 10−181 × 10−151 × 10−121 × 10−91 × 10−61 × 10−31 × 10−21 × 10−111 × 1011 × 1021 × 1031 × 1061 × 1091 × 10121 × 10151 × 10181 × 10211 × 10241 dΩ1 × 10−251 × 10−221 × 10−191 × 10−161 × 10−131 × 10−101 × 10−71 × 10−41 × 10−31 × 10−21 × 10−111 × 1011 × 1021 × 1051 × 1081 × 10111 × 10141 × 10171 × 10201 × 10231 cΩ1 × 10−261 × 10−231 × 10−201 × 10−171 × 10−141 × 10−111 × 10−81 × 10−51 × 10−41 × 10−31 × 10−21 × 10−111 × 1011 × 1041 × 1071 × 10101 × 10131 × 10161 × 10191 × 10221 mΩ1 × 10−271 × 10−241 × 10−211 × 10−181 × 10−151 × 10−121 × 10−91 × 10−61 × 10−51 × 10−41 × 10−31 × 10−21 × 10−111 × 1031 × 1061 × 1091 × 10121 × 10151 × 10181 × 10211 μΩ1 × 10−301 × 10−271 × 10−231 × 10−211 × 10−181 × 10−151 × 10−121 × 10−91 × 10−81 × 10−71 × 10−61 × 10−51 × 10−41 × 10−311 × 1031 × 1061 × 1091 × 10121 × 10151 × 10181 nΩ1 × 10−331 × 10−301 × 10−271 × 10−241 × 10−211 × 10−181 × 10−151 × 10−121 × 10−111 × 10−101 × 10−91 × 10−81 × 10−71 × 10−61 × 10−311 × 1031 × 1061 × 1091 × 10121 × 10151 pΩ1 × 10−361 × 10−331 × 10−301 × 10−271 × 10−241 × 10−211 × 10−181 × 10−151 × 10−141 × 10−131 × 10−121 × 10−111 × 10−101 × 10−91 × 10−61 × 10−311 × 1031 × 1061 × 1091 × 10121 fΩ1 × 10−391 × 10−361 × 10−331 × 10−301 × 10−271 × 10−241 × 10−211 × 10−181 × 10−171 × 10−161 × 10−151 × 10−141 × 10−131 × 10−121 × 10−91 × 10−61 × 10−311 × 1031 × 1061 × 1091 aΩ1 × 10−421 × 10−391 × 10−361 × 10−331 × 10−301 × 10−271 × 10−241 × 10−231 × 10−221 × 10−211 × 10−201 × 10−191 × 10−181 × 10−151 × 10−121 × 10−91 × 10−61 × 10−311 × 1031 × 1061 zΩ1 × 10−451 × 10−421 × 10−391 × 10−361 × 10−331 × 10−301 × 10−271 × 10−241 × 10−231 × 10−221 × 10−211 × 10−201 × 10−191 × 10−181 × 10−151 × 10−121 × 10−91 × 10−61 × 10−311 × 1031 yΩ1 × 10−481 × 10−451 × 10−421 × 10−391 × 10−361 × 10−331 × 10−301 × 10−271 × 10−261 × 10−251 × 10−241 × 10−231 × 10−221 × 10−211 × 10−181 × 10−151 × 10−121 × 10−91 × 10−61 × 10−31