Helm Values Size Calculator

Measure the size and complexity of a Helm values.yaml file across environments.

About Helm Values Size Calculator

Helm merges values from multiple sources — the chart's default values.yaml, any `-f` override files, and `--set` flags — using a deep-merge where later sources take precedence over earlier ones. The final in-memory values object is not the simple sum of every source's size, because keys defined in both the defaults and an override are only represented once in the merged result, so the true footprint subtracts that overlap.

Formula

mergedSize = defaultValues + overrideValues - overlap

D: Default values.yaml size in KB
O: Override values size in KB
V: Overlapping keys size in KB
S: Merged values size in KB

Worked example

With the default values below, Helm Values Size Calculator returns Merged Values Size of 9.50. Change any input above and every figure here is recalculated in your browser.

Inputs used

Default values.yaml Sizeaccepts 0–10,000 KB: 8 KB
Override Values Sizeaccepts 0–10,000 KB: 3 KB
Overlapping Keys Sizeaccepts 0–10,000 KB: 1.5 KB

Results

Merged Values Size: 9.50 KB
Overlap Deduplication Savings: 13.6%

Step by step

1Merged size = default + override − overlap= 9.50KB
2Savings from overlap removal= 13.6%

Assumptions and limits

The result is derived only from the 3 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 2 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

What is Helm's values merge precedence order?

From lowest to highest precedence: chart's values.yaml, parent chart's values for subcharts, `-f`/`--values` files in the order given, then `--set`/`--set-string`/`--set-json` flags, with later sources overriding earlier ones key-by-key.

Does a larger merged values size slow down rendering?

Marginally — Go template rendering has to walk the values object for every `{{ .Values.* }}` reference, so very large merged values (thousands of keys) can add measurable render time on complex charts, though it's rarely the dominant cost.

How do I find which keys are actually overlapping?

Run `helm template` with `--debug` or diff the chart's default values.yaml against your override file key-by-key; tools like `yq` or `dyff` can compute structural diffs to identify overlapping paths precisely.