This converter turns petabytes into terabytes instantly, using the exact factor 1 petabyte = 1000 terabytes. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
One thousand terabytes, the scale of data centres. One trillion bytes; standard hard-drive capacity.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
petabytes- The amount you are converting, measured in petabytes
1000- The exact number of terabytes in one petabyte
terabytes- The converted result
How it works, step by step
- Enter the number of petabytes you want to convert.
- The value is multiplied by 1000, the exact conversion factor.
- The result is displayed in terabytes, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 petabytes
Multiply 5 by 1000. That gives 5,000 terabytes. A quick sanity check: one petabyte is larger than one terabyte, so the number should get bigger — and it does.
Converting 72 petabytes
72 × 1000 = 72,000 terabytes. Working backwards, 72,000 ÷ 1000 returns 72 petabytes, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many terabytes are in one petabyte?
Exactly 1000. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert petabytes to terabytes?
Terabytes = petabytes × 1000. To reverse it, divide instead: petabytes = terabytes ÷ 1000, which is the same as multiplying by 0.001.
Is the petabyte bigger than the terabyte?
Yes. One petabyte equals 1000 terabytes, so it is the larger unit.
Why does my answer differ slightly from other petabytes to terabytes converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a petabyte?
One thousand terabytes, the scale of data centres.
What is a terabyte?
One trillion bytes; standard hard-drive capacity.
Petabytes to terabytes reference table
| Petabytes | Terabytes |
|---|---|
| 0.5 PB | 500 TB |
| 1 PB | 1,000 TB |
| 2 PB | 2,000 TB |
| 3 PB | 3,000 TB |
| 5 PB | 5,000 TB |
| 10 PB | 10,000 TB |
| 15 PB | 15,000 TB |
| 20 PB | 20,000 TB |
| 25 PB | 25,000 TB |
| 50 PB | 50,000 TB |
| 75 PB | 75,000 TB |
| 100 PB | 100,000 TB |
| 250 PB | 250,000 TB |
| 500 PB | 500,000 TB |
| 1000 PB | 1,000,000 TB |
Exact factor: 1 petabyte = 1000 terabytes. Values rounded for display.