---
title: "Vicat setting time interpolation"
category: "testing-analysis-systems"
description: "Linear interpolation for initial setting time at a penetration or needle–base threshold per ASTM C191 and EN 196-3 bracketing readings."
relatedStandards: ["ASTM C191","EN 196-3"]
url: "https://vectorbtc.com.tr/resources/calculators/vicat-setting-time/"
---

Enter the last reading at or above the threshold (E, C) and the first reading below it (H, D). The calculator applies the ASTM C191 interpolation formula and rounds to the nearest minute.