Social Distancing Calculator for Coronavirus

This social distancing calculator reproduces a simplified coronavirus transmission-risk model from the supplied source page. It combines eight inputs: separation distance, exposure duration, ventilation quality, mask use, assumed viral load, room area, occupancy, and activity. Each condition contributes a weighted term to a total risk value. Distance declines exponentially in the formula, while longer exposure, poorer ventilation, weaker masks, higher viral load, vocal or physical activity, and crowding increase the result. The source weights distance and time most heavily at twenty-five percent each. Ventilation and masks each receive fifteen percent, viral load receives ten percent, and activity and occupancy density each receive five percent. The terms are added and multiplied by one hundred, then rounded. Scores of 76 or more are labeled very high, 51 through 75 high, 26 through 50 moderate, and lower values low. The safety score is one hundred minus risk, with a floor of zero. Recommendations are also formula based. Very-high results suggest at least three meters or one and a half meters beyond the entered distance, whichever is greater, and limit exposure to thirty percent of the entered time with a fifteen-minute minimum. High results add one meter with a two-and-a-half-meter minimum and halve exposure with a thirty-minute minimum. Moderate results add half a meter with a two-meter minimum and use seventy percent of entered time with a sixty-minute minimum. Low results retain the entered distance and time. This is not an epidemiological model and cannot calculate an individual's probability of infection. The supplied formula can classify even strongly protected scenarios as high because its weighted factors include substantial baseline values. Results should therefore be understood as relative outputs of that formula, not percentages of infection probability and not current public-health guidance. COVID-19 risk changes with the circulating variant, immunity, vaccination, prior infection, symptoms, infectious stage, air filtration, air changes, humidity, room geometry, and whether an activity occurs outdoors. Distance alone does not eliminate aerosol transmission in shared indoor air. Ventilation, filtration, well-fitting respirators, shorter duration, testing, vaccination, and staying home when ill can form complementary layers. Follow current advice from local public-health authorities because recommendations evolve. People at higher risk of severe disease may choose stronger precautions. Seek clinical guidance for symptoms or treatment questions, and use emergency services for severe breathing difficulty, persistent chest pain, new confusion, inability to wake, or blue or gray lips or skin.