Free engineering reference tools
NDT, ERT & Materials Testing Calculators
Useful field and laboratory calculations for engineers, QA/QC professionals and construction teams. Select a test, enter your readings and see the mathematics with the correct units.
Read before use: Calculations are educational checks, not accredited test reports or automatic IS/BIS conformity decisions. Instrument calibration, corrections, field geometry, sample preparation and the exact current test standard must be verified. An apparent resistivity value is not an ERT subsurface inversion. Rebound numbers and UPV readings are not direct concrete-strength results.
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GTSM Testing Labs LLP provides geotechnical investigations, NDT, concrete and construction-material testing in Ahmedabad and across Gujarat. Share your site and required testing scope for a quotation.
Request a testing quotationVisit GTSM websiteTechnical context: relevant IS 516 parts (concrete/NDT), IS 2386 parts (aggregate tests), IS 3495 (bricks), IS 15658 (pavers), IS 1608/IS 1786 (steel), IS 2720/IS 2131 (soils), IS 3043 (earth resistivity), ASTM D6431 (geophysical resistivity), ASTM C876 (half-cell). Consult the current authoritative standard and your laboratory procedure, including revisions and apparatus-specific corrections.