Spot Instance Savings Calculator
Calculate savings and risk-adjusted costs for cloud spot instances. Compare spot vs on-demand pricing accounting for interruption rate.
How to Use the Spot Savings Calculator
- Enter on-demand hourly price.
- Enter spot hourly price.
- Enter monthly hours of operation.
- Enter expected interruption rate.
- Click Calculate to see savings and risk-adjusted cost.
Cas d'utilisation
- •Evaluating spot instances for batch ML training jobs.
- •Calculating cost savings for fault-tolerant workloads.
- •Planning mixed on-demand/spot deployment strategies.
- •Presenting spot savings opportunities to engineering teams.
Formule
Savings = (On-demand − Spot) / On-demand × 100%. Risk-adjusted cost = Spot × hours × (1 + interruption rate × 0.5).
Questions fréquemment posées
What are spot instances?
Spot instances use spare cloud capacity at steep discounts (50–90%), but can be interrupted with 2 minutes' notice.
What workloads suit spot?
Batch processing, ML training, rendering, and fault-tolerant applications are ideal for spot instances.
What is a typical interruption rate?
AWS spot interruption rates average 5–10% per month for most instance types, but vary significantly.