String Weight Calculator

String Weight Calculator computes the weight of tubing or casing strings in air and buoyed in any completion or drilling fluid, accounting for buoyancy factor by fluid density. Get accurate hanging weight and landed weight for tapered or single-grade strings, so hook load and hanger load figures can be trusted before you pick up the string.

How It Works

Air weight = nominal weight (lb/ft) × string length. Buoyed weight = air weight × buoyancy factor, where BF = 1 − (fluid density ÷ 65) for fluid density in ppg.

See every formula worked through in detail on the Completion Engineering Formulas reference.

When You'd Use It

While picking up a completion string, engineers compare the expected buoyed weight against live weight indicator readings — a reading that doesn't match the calculated figure is often the first sign of a stuck point, an obstruction, or a hanging-up string before it becomes a bigger problem downhole.

Key Features

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