Hamza Learning
Free HSE tools

HSE calculators

سیفٹی رپورٹ کے حساب — فوری اور مفت

Work out LTIFR, TRIR, severity rate, man-hours and noise exposure for your monthly HSE report. Each tool shows the formula it uses.

LTIFR — Lost Time Injury Frequency Rate

LTIFR = (LTIs × 1,000,000) ÷ total hours worked

TRIR — Total Recordable Incident Rate

TRIR = (recordable cases × 200,000) ÷ total hours worked

Severity rate

Severity rate = (days lost × 1,000,000) ÷ total hours worked

Man-hours

Man-hours = workers × hours per day × working days

Noise exposure (daily dose)

Allowed time T = 8 ÷ 2^((L − criterion) ÷ exchange rate); Dose = time ÷ T × 100%

These tools are for learning and quick checks. Always follow your company and client procedures (for example, the base hours they use) for official reports.