Browse by category
Lifting & Rigging
Sling tension, CoG, crane chart, LEEA mode factor, lift-plan categorisation, D/d ratio.
6 tools →LEEA Inspection
LOLER scheduler, wire-rope (ISO 4309) and chain (EN 818) discard, hook throat checker.
4 tools →LEEA Hardware SWL
Eyebolt, shackle, vacuum & magnetic lifter, plate & beam clamp SWL.
6 tools →Risk Assessment
5×5 matrix, hierarchy-of-controls scorer, and bowtie threat–control viewer.
3 tools →Gas Safety
ppm ↔ %LEL conversion, SCBA duration, confined-space ventilation, TWA/STEL exposure dose.
4 tools →Electrical Safety
Arc-flash incident energy & boundaries (IEEE 1584), LOTO sequencer, cable voltage drop.
3 tools →Work at Height
Fall-clearance, scaffold load capacity, ladder angle (4:1 rule).
3 tools →Fire Safety
Extinguisher selector, muster-time estimator, hydrant flow & sprinkler density.
3 tools →Driving Safety
Stopping distance, Journey Risk Assessment scoring, convoy spacing & 2-second rule.
3 tools →ATEX / Hazardous Areas
IP-code decoder, Zone 0/1/2 visualiser, Ex equipment marking decoder.
3 tools →Featured calculators
Sling Load Calculator
T = (W × HF) / (N × sin θ)Tension per leg with hitch factor and angle correction. ASME B30.9 / EN 13414.
Most used #03 · RISK5×5 Risk Matrix
Score = L × SClick any cell to record a hazard with auto Low/Med/High/Extreme rating. ISO 31000.
Toolbox-ready #08 · ELECTRICALArc Flash Boundary
E = 4.184·Cf·En·(t/0.2)·(610/D)ˣIncident energy and Limited / Restricted approach boundaries. IEEE 1584-2018.
High demand #10 · HEIGHTFall Clearance
Lan + Dec + h + str + marginRequired clearance below the anchor vs distance to the next lower level. ANSI Z359.
Pre-job #06 · GASSCBA Duration
[(Pcyl − Pres)·V / Patm] / RMVWorking & escape duration with reserve warnings. NFPA 1404.
Confined-space #29 · LEEALOLER Examination Scheduler
+6 m · +12 mNext thorough-examination date per LOLER reg. 9 + LEEA COP-LOLER.
NewBuilt on the codes that govern your worksite
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How to use these tools
1Pick a domain
Open any category from the navigation or the cards above. Tools calculate instantly as you type — no submit buttons.
2Adjust inputs
Use sliders, segmented controls and selectors. Hover the small i circles for definitions of technical terms.
3Print or export
Every tool offers print, PDF, JSON and CSV export, plus reset and JSON import for re-using saved scenarios.
Frequently asked questions
Are these calculators certified for engineered use?
No. They are training aids built around publicly available standards and simplifications. Engineered decisions must be made by competent persons using the full standard and site-specific data.
Do my inputs leave my browser?
No. Every calculator runs entirely client-side in JavaScript. Your inputs and exported reports never reach our servers.
Can I use the tools offline?
Once a page has loaded, the calculators work offline. PDF and chart features rely on CDN libraries that need an initial connection.
Do you provide on-site training?
Yes — visit our Udemy profile or contact us on +968 92706810 for in-person sessions across Oman.
Need calibration, inspection or on-site training?
GCS Oman runs in-house and on-site sessions across the Sultanate — from rigger refreshers to LEEA-aligned inspector qualifications. Talk to us about a programme tailored to your fleet.