What is a quick mental conversion?
Multiply miles by 1.6, or use the Fibonacci trick: 5 miles ≈ 8 km, 8 miles ≈ 13 km, 13 miles ≈ 21 km.
Convert miles to kilometers and kilometers to miles instantly. Includes a quick reference table for common distances.
Kilometres = miles × 1.609344. Miles = km ÷ 1.609344 (or × 0.621371). Pace: min/km = min/mile ÷ 1.609.
A 26.2-mile marathon is 42.2 km. A 5K race is 3.11 miles, and an 8:00/mile pace equals about 4:58/km.
Multiply miles by 1.6, or use the Fibonacci trick: 5 miles ≈ 8 km, 8 miles ≈ 13 km, 13 miles ≈ 21 km.
Divide your per-mile pace by 1.609. A 10:00/mile pace is 6:13/km — the per-kilometre figure is always the smaller number.
Common equivalents are 30 mph ≈ 48 km/h, 60 mph ≈ 97 km/h and 70 mph ≈ 113 km/h. Posted metric limits are usually rounded to the nearest 10.