At a glance
- Pricing model
- Free government tool (download)
- Public pricing
- Yes
- Cheapest rate
- Free Excel-based tool (Statutory Metric + Small Sites Metric)
- Verified
- 2026-06-21
Recent changes
Small Sites Metric and Statutory Metric user guides last updated July 2025. The tool itself remains free; it is mandatory for all BNG calculations submitted to LPAs.
Source
Primary source: https://www.gov.uk/government/publications/statutory-biodiversity-metric-tools-and-guides.
How this fits the three-route framing
JP039 v4.0 is the canonical calculator; every BNG submission ultimately resolves to its output. Free, mandatory at planning submission, the spreadsheet is the substrate every other tool wraps.