Drillstring Toolbox vs Vapour Pressures

Drillstring Toolbox is a free calculator from Standard DS-1 that gives you the drill-stem load capacities you need! You can choose an API connection (along with the size you're interested in) to find its recommended makeup torque and tensile capacity. Tap the "Tube" tab to find the tensile and torsion capacities for drill pipe tubes as well!

Vapour Pressures is a powerful, easy-to-use tool designed for engineers, scientists, students, and anyone working with phase-change phenomena who need to calculate vapor pressures and boiling points quickly and accurately. With two extensive built-in databases covering a wide range of substances, and full support for numerous pressure and temperature units, Vapour Pressures adapts to your workflow whether you’re in the lab, classroom or field. Enter the known variables and instantly obtain the corresponding vapor pressure or boiling point in your preferred units. The app supports multiple languages and requires no data collection — making it ideal for both personal and professional use. Make your gas-liquid equilibrium calculations streamlined, reliable and accessible with Vapour Pressures.