EZ VIRTUAL TOOLS

5,000+ Free
Professional Calculators
for 45 Industries

Petroleum. HVAC. Electrical. Construction. Mechanical. Marine. Solar. Welding.
Industry-standard tools. No account. No cost. Instant answers.

5,091

Calculators

45

Industries

40+

Workflows

Free

Always

Browse Petroleum (464) Mechanical Electrical HVAC

Petroleum Engineering Platform

The most comprehensive free petroleum calculator suite available. 464 calculators across 14 disciplines including a real-time Fishing Decision Engine with API RP 7G references, mechanism diagnosis, and professional reports.

Fishing Decision Engine All 464 Calcs

464

Calculators

14

Disciplines

176

Fishing/Stuck

40

Workflows

45 Industries. One Platform.

Every industry has its own site with dedicated calculators. Click any to explore.

Fire Protection

Water Treatment

Flagship: Petroleum Engineering

Industry-grade tools built for the wellsite. Used during live operations.

Decision Engine

Fishing Decision Engine v4

Real-time stuck pipe diagnosis with mechanism scoring, safe pull limits, explained recommendations, case-based reasoning, and professional reports. API RP 7G referenced.

Pipe Stretch / Free Point

Calculate stretch and estimate free point depth from pull test data. Multi-segment strings. API RP 7G.

Safety Critical

Overpull vs Yield Limit

Maximum safe overpull for any pipe grade with wall wear adjustment. Know your limit before you pull.

Decision Support

Overshot vs Spear Decision

Scored recommendation for external vs internal catch based on fish condition, clearance, and bore access.

Live Demo: Fishing Decision Engine

Real output — 5" S-135 stuck at 12,000 ft in 14 ppg mud.

Loading...

Run With Your Data →

API/SPE/ASME Referenced

5,091 Verified Calculators

45 Industry Sites

No Account Required

Mobile Ready

100% Free