Interactive Calculators
Safety Calculators & OSHA Tools
Free tools for TRIR calculation, arc flash safety, confined space ventilation, heat stress prevention, fall protection requirements, crane safety, and hazard identification.
These tools are for general informational use only and do not replace site-specific review by qualified safety professionals. See our Terms of Service for details.
TRIR Calculator
Calculate your OSHA recordable incident rate (TRIR), DART rate, and LTIR using the 200,000-hour formula for OSHA reporting and safety performance review.
Open tool fall protectionFall Clearance Calculator
Calculate fall clearance distance for personal fall arrest systems (PFAS) from lanyard length, deceleration distance, D-ring shift, worker height, and safety margin.
Open tool environmentalHeat Stress Calculator
Support heat stress prevention with WBGT estimates and recommended work/rest schedules based on ACGIH/NIOSH guidance.
Open tool environmentalNoise Exposure Calculator
Evaluate workplace noise exposure levels (TWA and Dose %) based on OSHA 29 CFR 1910.95 standards.
Open tool heavy equipmentCrane Swing Radius Calculator
Calculate crane swing radius and hazard zone boundaries to mark and barricade the swing zone for lift planning and OSHA 1926.1424 compliance.
Open tool excavationExcavation & Trenching Calculator
Determine OSHA-compliant sloping, benching, or shoring requirements based on soil type and excavation depth.
Open tool formsPre-Task Plan (PTP) Form
Identify task-specific hazards, coordinate with nearby trades, and confirm safety controls before work starts.
Open tool formsJob Hazard Analysis (JHA) Form
Break down tasks, identify hazards, assess risk, and implement controls using the hierarchy of controls.
Open tool ergonomicsNIOSH Lifting Equation Calculator
Assess manual lifting risk and determine a Recommended Weight Limit (RWL) to prevent lower back injuries.
Open tool electricalArc Flash Calculator
Estimate incident energy (cal/cm²), arc flash boundary, and NFPA 70E PPE category for electrical work planning and label generation.
Open tool confined spaceConfined Space Ventilation Calculator
Support confined space safety by calculating air exchanges and fan run time before confined space entry.
Open tool risk assessmentRisk Assessment Matrix Tool
Use hazard identification and a 5x5 matrix to score, prioritize, and control workplace hazards.
Open tool fall protectionLadder Angle Calculator
Check extension ladder setup with the OSHA 4-to-1 rule: correct base distance, ladder length, working height, and the ~75-degree angle.
Open tool electricalMinimum Approach Distance (MAD) Calculator
Estimate OSHA minimum approach distances for work near energized high-voltage lines per 29 CFR 1910.269 and 1926.960.
Open toolOne more tool: your paper trail
A talk nobody signed never happened. Not to an OSHA inspector.
These calculators do the math. The sign-in sheet does the proving. It comes free with 10 word-for-word talks in English and Spanish, plus a new 2-minute talk every weekday — built from an incident that just made the news — in your inbox before the huddle. When the inspector asks “can you prove it?”, you open a folder, not a debate.
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