About the Ride Time Calculator This calculator estimates ride time by dividing the distance by average cycling 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 � cycling speed (km/h or mph if unit is miles). Typical defaults provided. Possible improvements You can extend this tool by adding elevation gain adjustments, terrain modifiers, or estimated calories burned (requires weight).