Free Tier Usage Limit Calculator

Work out free tier usage limit instantly with clear inputs, formula shown and shareable results.

About Free Tier Usage Limit Calculator

Free tier allowances reset monthly, so what matters is whether the current daily rate will exhaust the allowance before the month ends. Projecting from usage to date gives the answer and, more usefully, the number of days remaining — which is the figure to alert on rather than a percentage of allowance consumed.

Formula

Free tier projection

daily rate = usage / day of month; projected = daily rate x 30.44; days until exhausted = (allowance - usage) / daily rate

Worked example

With the default values below, Free Tier Usage Limit Calculator returns Projected month-end usage of 1,082,311. Change any input above and every figure here is recalculated in your browser.

Inputs used

Free tier allowanceminimum 1 units: 1,000,000 units
Usage so far this monthminimum 0 units: 640,000 units
Day of the monthaccepts 1–31: 18
Price per unit above the free tierminimum 0: 0

Results

Projected month-end usage: 1,082,311 units
Projected usage above the free tier: 82,311 units
Projected overage cost: $0.0165
Days until the allowance is used up: 10.1 days

Step by step

1Values used
2Free tier projection
3Projected month-end usage= 1,082,311 units
4Projected usage above the free tier= 82,311 units
5Projected overage cost= 0.0165
6Days until the allowance is used up= 10.1 days

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Do all free tiers reset monthly?

Most always-free allowances do, but twelve-month introductory tiers expire permanently. Mixing the two up produces an unpleasant surprise in month thirteen.

Should production depend on a free tier?

No. Exceeding it silently starts charging, and any change in the provider's terms becomes a cost event. Treat free tiers as a development convenience.