Master Your Drilling Calculations with V-Cal

V-Cal is the ultimate drilling calculator and well control tool designed for drilling engineers, toolpushers, and rig crews. Eliminate manual errors and ensure safety on the rig floor with instant, accurate calculations for wellbore geometry, hydraulics, and pressure control.

Whether you are drafting a digital kill sheet or calculating pump strokes, V-Cal delivers precision—even without an internet connection. It is the essential oilfield companion for reliable decision-making.

Top Features:

🛠️ Advanced Wellbore Geometry & Volumetrics

Instantly calculate annular volumes between drill strings, collars, and open holes.

Save internal capacities for quick reuse.

Get accurate data for pump strokes, displacement, and circulation times (lag time).

⚠️ Digital Kill Sheets & Well Control

Manage well kicks safely with our rapid kill sheet data generator.

Input your data to instantly determine the required Kill Mud Weight and create precise Pumping Schedules.

Essential for maintaining safety standards during critical drilling operations.

🌊 Surface & Subsea Capabilities

Versatile calculations adapted for both Surface BOP and Subsea stack configurations.

📏 Flexible Unit Converter

Seamlessly switch between API (Field Units) and Metric Units to match your rig's specific requirements.

Your Office on the Rig Floor

100% Offline Mode: Fully functional in remote locations with zero connectivity.

User-Friendly Interface: designed for easy input on small screens, specifically for the Android environment.

More features to follow in upcoming updates

⚖️ Disclaimer While V-Cal is designed for precision and accuracy, it is intended to be used as a primary reference tool. Users are strongly advised to cross-verify all critical calculations with standard rig procedures and approved well control worksheets before operational implementation. The developer assumes no liability for losses or damages resulting from reliance on this application.