43 free HSE calculators and 18 financial/Pakistan tax calculators, built by our team and made freely available to safety and finance professionals alike. Every tool opens in a new tab — no signup required. Looking for practice exams instead? View all exams here.
Organized by discipline — each calculator cites its underlying standard or methodology (OSHA, NIOSH, NFPA, IEEE, ISO, ACGIH, and others) and shows its formula alongside the result.
Total Recordable Incident Rate, per OSHA/ISO conventions.
Lost Time Injury Frequency Rate across international/OSHA bases.
Days Away, Restricted, or Transferred case rate.
Accident Frequency Rate with built-in FAR and TRIR conversion.
Flexible BLS-style rate for any OSHA 300A case category.
Lost workdays per hours worked — how bad, not just how often.
The foundational denominator for every rate calculator.
API RP 754 process safety event rate calculation.
Determine Tier 1/2 classification for a loss of containment event.
Multi-segment noise dose and 8-hr TWA per OSHA/NIOSH.
TWA vs. STEL/excursion limit compliance checking.
Wet Bulb Globe Temperature and ACGIH work/rest guidance.
Room ACH and CDC airborne contaminant clearance time.
TWA, extended-shift adjustment, and mixture exposure index.
NFPA 10 travel distance and floor-area coverage.
OSHA 1910.106 cabinet and incidental storage limits.
Convert gas detector readings to actual concentration.
Fire load density per EN 1991-1-2 (Eurocode 1).
Likelihood x Severity with a live visual risk matrix.
Severity x Occurrence x Detection, ranked by priority.
Gross Disproportion Factor for risk reduction decisions.
UK HSE individual risk bands and F-N societal risk.
Recommended Weight Limit and Lifting Index.
Upper limb and whole-body postural risk assessment.
Required force to move a load, by surface and incline.
OSHA 4:1/6:1 safety factor and duty rating classification.
ASME B30.9 rigging sling tension and load angle factor.
OSHA Appendix B maximum allowable slope by soil type.
Required clearance for a personal fall arrest system.
IEEE 1584-2002 incident energy and arc flash boundary.
NEC Table 310.16 ampacity, derating, and voltage drop.
Scope 1 & 2 emissions using DEFRA/EPA factors.
Multi-stream diversion rate and disposal cost.
Water supply and sewerage cost via return-to-sewer method.
SFPE hydraulic flow method for egress time.
Planning-level first aider staffing estimate.
Initial and recurring PPE program cost planning.
Weighted compliance rate across multiple training courses.
Weighted audit scoring with critical-finding override.
16-section GHS/OSHA HazCom format completeness check.
Verified 16-section reference data for common chemicals.
Material quantity and cost from plot area and floors.
Solar panel/inverter/battery sizing and installed cost.
General business/personal finance tools, plus Pakistan-specific tax calculators verified against current Finance Act rates.
Monthly installment, total interest, and amortization for any loan.
Investment growth with lump sum and optional monthly contributions.
Fixed/variable costs to break-even units and revenue.
Project cash flow evaluation — NPV, IRR, and payback period.
Straight-line and double-declining balance methods with schedule.
Margin and markup from cost/price, or solve for price.
Future cost of goods and purchasing power erosion.
Required monthly savings to reach a target goal.
EMI with grace period and balloon payment options.
Salaried & non-salaried/AOP slabs, FY 2026-27 (Finance Act 2026).
Add or extract 18% standard Pakistan sales tax.
Section 153/155/150 rates, filer vs. non-filer.
Section 236K (purchase) and 236C (sale) withholding tax.
Property CGT by holding period, filer vs. non-filer.
PSEB-registered vs. unregistered export tax rates.
General/small company rates plus minimum turnover tax.
2.5% Zakat on net zakatable assets above Nisab.
Net pay after income tax, Provident Fund, and EOBI.
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