Select a base image and enter application and dependency layer sizes to estimate final image size, pull time, and registry storage cost with and without multi-stage builds.
No data is transmitted — everything runs locally
Tool
Example — Representative default scenario — base MB 120 · deps MB 180 · app MB 40.
Base image
7 MB
alpine
Total image size
257 MB
single stage
Savings vs single-stage
0 MB
use multi-stage
Attack surface
Medium
About this tool
Container Image Size Estimator
The Container Image Size Estimator computes final image size from base image selection and layer sizes, with multi-stage build comparison, pull time, and registry cost modeling.
• Estimate image size before building to choose between Alpine and Debian Slim base
• Calculate cold start latency improvement from switching to a smaller base image
• Model registry storage cost for a fleet of microservices with N image versions retained
• Quantify multi-stage build size savings before investing in Dockerfile refactoring
Affiliate disclosure
Developer-friendly cloud infrastructure. DigitalOcean provides cloud compute, networking, and managed databases with predictable pricing.
External site · Independent provider · We may receive a commission · Not a recommendation
FAQ
What does this tool tell you?
The Container Image Size Estimator computes final image size from base image selection and layer sizes, with multi-stage build comparison, pull time, and registry cost modeling.
What affects the result most?
Base image size comparison: alpine (~7MB), distroless/static (~2MB), ubuntu (~70MB), node:20 (~1GB). Multi-stage build savings: build stage with full toolchain discarded, only runtime artifact copied. Layer deduplication: shared base layers across images reduce registry storage and pull time.
How should I use the result?
The calculation is deterministic — the same inputs always produce the same output — so the most useful workflow is to vary one input at a time and see which factor moves the result most. That tells you where to focus your attention before committing to a decision.
Managed infrastructure for platform services. DigitalOcean App Platform and managed databases for platform engineering teams evaluating cloud providers.