Calculation library

Engineering calculators

Quick, exact calculators for instrument and control engineers. Each one shows its working, the standard it follows, and a link you can share.

Instrumentation and control

Signals, sensors, level and valves: the everyday checks of instrument and control work.

4–20 mA calculator

mA ↔ % ↔ engineering units, square root, NAMUR NE43 limits.

Pt100 calculator

RTD Ω ↔ °C by IEC 60751, Pt100 and Pt1000, with a full table.

DP level calculator

DP level LRV / URV with SG, dry leg and wet leg.

Cv and Kv calculator

Cv ↔ Kv, and liquid Cv / Kv from flow, ΔP and SG.