Base Change Conversions Calculator

Crop Image

×

Crop

Convert 84 from decimal to octal

(base 8) notation:

Power Test

Raise our base of 8 to a power

Start at 0 and increasing by 1 until it is >= 84

8⁰ = 1

8¹ = 8

8² = 64

8³ = 512 <--- Stop: This is greater than 84

Since 512 is greater than 84, we use 1 power less as our starting point which equals 2

Build octal notation

Work backwards from a power of 2

We start with a total sum of 0:

8² = 64

The highest coefficient less than 7 we can multiply this by to stay under 84 is 1

Multiplying this coefficient by our original value, we get: 1 * 64 = 64

Add our new value to our running total, we get:
0 + 64 = 64

This is <= 84, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 64

Our octal notation is now equal to 1

8¹ = 8

The highest coefficient less than 7 we can multiply this by to stay under 84 is 2

Multiplying this coefficient by our original value, we get: 2 * 8 = 16

Add our new value to our running total, we get:
64 + 16 = 80

This is <= 84, so we assign our outside coefficient of 2 for this digit.

Our new sum becomes 80

Our octal notation is now equal to 12

8⁰ = 1

The highest coefficient less than 7 we can multiply this by to stay under 84 is 4

Multiplying this coefficient by our original value, we get: 4 * 1 = 4

Add our new value to our running total, we get:
80 + 4 = 84

This = 84, so we assign our outside coefficient of 4 for this digit.

Our new sum becomes 84

Our octal notation is now equal to 124

Final Answer