UPV Concrete Quality Checker

Calculate ultrasonic pulse velocity and check the indicative quality grading.

Pulse path length (mm)

Transit time (µs)

Transmission arrangement

Ultrasonic Pulse Velocity

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Important: The quality grading shown below is based on the IS 516 (Part 5/Sec 1): 2018 velocity criteria for cross probing/direct transmission. Do not use UPV alone to estimate concrete grade or compressive strength.

Indicative UPV quality grading — Direct/Cross Probing

Average UPV	Quality grading
Above 4.40 km/s	Excellent
3.75–4.40 km/s	Good
3.00–3.75 km/s	Doubtful
Below 3.00 km/s	Poor

Source: IS 516 (Part 5/Sec 1): 2018. Actual UPV is influenced by moisture, temperature, reinforcement, surface condition, path length, concrete materials, cracks and voids. For doubtful results, further investigation may be required.