What this calculator does
Cloud providers like AWS, Azure, and Google Cloud quote on-demand prices per hour, but budgets and finance teams think in monthly and yearly figures. This converter translates between hourly, monthly, and yearly cloud costs using the industry-standard convention of 730 hours per month and 8760 hours per year. It also multiplies by the number of instances so you can estimate fleet costs at a glance.
How to use it
Choose whether you are starting from an hourly rate (the number shown on a provider's pricing page) or a known monthly cost. Enter the value and the number of identical instances you plan to run continuously, then read off the per-unit and total breakdown.
The formula explained
The 730-hour figure comes from dividing the 8760 hours in a year by 12 months, giving the average billing month most cloud providers use. So
$$\text{monthly} = \text{hourly} \times 730$$and
$$\text{yearly} = \text{hourly} \times 8760$$Going the other way,
$$\text{hourly} = \frac{\text{monthly}}{730}$$Daily cost is simply the hourly total times 24. Totals multiply each per-unit value by your instance count.
Worked example
An instance costs $0.10/hour and you run 3 of them. Per unit:
$$\text{monthly} = 0.10 \times 730 = \$73$$$$\text{yearly} = 0.10 \times 8760 = \$876$$For 3 instances the total monthly cost is
$$73 \times 3 = \$219$$and yearly is
$$876 \times 3 = \$2{,}628$$FAQ
Why 730 hours and not 720 or 744? 730 is the year-averaged month (\(8760 \div 12\)) and is what most cloud calculators use, so it avoids month-length bias.
Does this include reserved or spot discounts? No — enter the effective rate you actually pay. The tool is a straight unit conversion, not a discount model.
Can I convert from monthly back to hourly? Yes. Select "Monthly cost" as the input mode and the calculator divides by 730 to recover the hourly rate.
