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Welcome to **21 volts to amps**, our post explaining the conversion of 21 volts to amperes.

If you have been searching for *how many amps in 21 volts?*, then you are right here, too 🙂 because the unit symbol for volt is V.

In turn, the unit ampere is symbolized as A.

As detailed on our page volts to amps, in order to change 21V to A we must use either volts *and* ohm, or volts *and* watts.

## Calculator

## Convert 21 Volts to Amps

We employ the two formulas I_{(A)} = V_{(V)} / R_{(Ω)} and I_{(A)} = P_{(W)} / V_{(V)}.

Thus, A = V / Ω, and A = W / V → A = 21 / Ω, and A = W / 21.

In other words, we can change 21 volts to amps by means of ohm or via watts.

One of the two units must be chosen.

We recommend using our calculator at the top of this article.

Insert 21 in the voltage field, select watts or ohm from the drop-down menu, and then enter the amount corresponding to your choice in the second field to obtain your result on the fly.

BTW: Besides 21 volts to amperes, other conversions in this category include:

### 21V Watts to Amps

The 21V Watts to Amps formula is A = W / 21.

Replace W with your actual power in watt.

For example with W = 100, you obtain the result of 4.76 amps (rounded to two decimal places).

### 21V Ohm to Amps

The 21V ohm to amps formula is A = 21 / Ω.

Replace Ω with your individual resistance in ohm.

Assumed Ω = 20, the result of the conversion is 1.05 amps (rounded to two decimal digits).

## 21 Volts to Amps Summary

You have reached the concluding part of 21V to amperes.

As you already know, the answer to the question *how many amps in 21V?* depends on the actual value of ohm or watts.

The image sums it up:

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