Parquet & ORC File Sizing Calculator

Interactive Formula Engine

Calculate optimal target file count and partition sizing for columnar lakehouse formats (Parquet, ORC, Delta Lake, Apache Iceberg) to prevent small-file metadata bottlenecks.

Parameters & Workload Sizing

Total Uncompressed Data Volume

Target Lakehouse File Size

162048

Estimated Compression Ratio (X:1)

110

Projected Outcomes & Metrics

Recommended File CountTarget Count

667 files

Optimal number of output files to avoid driver metastore overload.

Avg Compressed File SizePer File

255.9 MB

Physical disk footprint per parquet file written.

Total Compressed DatasetStorage

166.67 GB

Total physical volume written to object storage.

Health StatusHealth Assessment

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Risk assessment for small-file metadata amplification.

EXCELLENT: 128MB–1GB aligns with standard HDFS/Cloud block sizes and ensures optimal Parquet page headers and dictionary encoding.