About the Drive Time Calculator This calculator estimates driving time by dividing the distance by average driving speed. You can switch between kilometers, miles and meters and provide a speed in km/h or mph. Parameters we support Distance � numeric value; unit chosen from km/miles/meters. Speed � driving speed (km/h or mph if unit is miles). Typical defaults provided. Possible improvements You can extend this tool by adding traffic delays, estimated stops, or fuel consumption estimators.