Data Package Cost
A data package's cost per gigabyte, per day, and per month.
Recent
Formula
How the calculation works
A data package has three prices at once and they need not agree: a price per gigabyte, a price per day, and a monthly equivalent. A 300 pack of 15 GB over 30 days is 20 per GB and 300 a month, while a 150 pack of 10 GB over 7 days is 15 per GB but 643 a month.
Which figure matters depends on how you use it. Someone who barely uses data inside one month cares about the per-GB price; someone who renews constantly cares about the monthly. Comparing packs on the headline price alone hides both.
Common mistakes
- Buying the cheapest pack without checking its validity. A low price over a short validity can cost several times more per day than a dearer long one.
- Comparing a 30-day pack with a 7-day one on price. They are not the same product; the monthly figure is what makes them comparable.
When to use it
- Use it to compare two packages you are actually choosing between, or to work out what your current pack costs over a month.
- It measures the pack, not your usage; if you rarely finish the data allowance, the per-day and monthly figures are the ones that matter.
Worked example
300 for 15 GB over 30 days: 20 per GB, 10 per day, 300 a month.
Common questions
How do I compare two packages?
Look at the per-GB and monthly figures. A cheaper pack with fewer days can still cost more per day.
Why is the month 30 days?
A common yardstick, so a 28-day and a 31-day pack can be compared on the same footing.
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