Free boring log & borehole log software for Windows From ground data to engineering decisions.

GeoEQ SPT Logs is free Windows boring log and borehole log software for Standard Penetration Test data. It records or imports field data and produces A4 bore logs with soil strata, samples, groundwater and an SPT N-value profile.

They are regional names for the same core geotechnical record: the subsurface conditions encountered during drilling, including strata, samples, groundwater and test results. “Boring log” is common in the United States, while “borehole log,” “bore log” and “borelog” are widely used internationally.

Yes. GeoEQ SPT Logs version 1.x is free and full-featured for commercial, academic and personal use. It does not require an account, subscription or licence key.

Yes. Standard office spreadsheets can be imported directly, and Excel or CSV files with other headings open a column-mapping window. The software suggests assignments and lets you confirm them before data enters the project.

Yes. The application works offline and stores project data as plain local files in Documents\GeoEQ SPT Logs\Projects. No cloud account is required.

The software sums the second and third 150 mm penetration blow counts to calculate the field SPT N-value. It can also accept a direct N-value, plots N against depth and handles refusal values.

Version 1.2 supports 64-bit Windows 10 and Windows 11. It is available as a standard installer and a portable ZIP package. A macOS build is planned but is not currently released.

Yes. Enter one row per core run — run top and bottom, TCR, SCR, RQD, core size and fractures per metre — and the cored interval is drawn on the log. There is no rock or soil mode to choose: a borehole with SPT rows and core runs draws both on one continuous sheet, and a borehole with only core runs draws as a rock log.

Rock Quality Designation, proposed by Deere in 1964. For each core run it is the combined length of intact, sound core pieces 100 mm (4 inches) or longer, divided by the length of the run, expressed as a percentage. RQD classifies rock as very poor (0–25%), poor (25–50%), fair (50–75%), good (75–90%) or excellent (90–100%). GeoEQ SPT Logs colours the recovery bar by this scale, so a weathered zone is visible before a number is read.

All three are the same fraction — recovered length divided by run length — with a progressively stricter definition of what counts. TCR (total core recovery) counts everything recovered from the barrel, including rubble. SCR (solid core recovery) counts only full-diameter solid cylinders. RQD counts only sound pieces 100 mm or longer. RQD is therefore always less than or equal to SCR, which is always less than or equal to TCR. GeoEQ SPT Logs uses that rule to draw all three as one nested bar, and to report a figure that breaks the order as a transcription error.

It is a focused, free gINT alternative when the required deliverable is a boring log with strata, samples, laboratory values, an N-value curve and rock core recovery. Bentley placed gINT in Support Discontinued status in January 2026. It does not replace every database, GIS or subsurface modelling capability in a larger geotechnical data platform.