One mile equals 1.609344 kilometers. To convert miles to kilometers, multiply the number of miles by 1.609344: 5 miles is 8.05 kilometers, 10 miles is 16.09 kilometers, and a marathon at 26.2 miles is 42.16 kilometers. The full chart below covers 0.5 to 1,000 miles, plus race distances, the reverse table, and speed conversions.
If you have ever trained for a race measured in kilometers, driven in a country where road signs show kilometers, or read a travel guide that switches units halfway through, you have felt this conversion problem. The United States and the United Kingdom still use miles for road distances, while most of the rest of the world uses kilometers, so this is one of the most common everyday conversions. At Zyrro, this guide gives you the exact chart, the simple formula, and the race and speed tables people actually look up, so you can stop guessing and start converting with confidence.
Table of Contents
- What is the miles to kilometers conversion?
- How do you convert miles to kilometers?
- Miles to kilometers (mi to km) conversion chart
- How many miles are common race distances in kilometers?
- How do you convert kilometers back to miles?
- How do you convert miles per hour to kilometers per hour?
- When do you need miles to kilometers?
- What mistakes should you avoid?
- Frequently Asked Questions
What is the miles to kilometers conversion?
The mile is a unit of length in the imperial and US customary systems, and the kilometer is a unit of length in the metric system, equal to 1,000 meters. Since the international yard and pound agreement of 1959, one foot has been defined as exactly 0.3048 meters, and one mile is 5,280 feet, which is why one mile equals exactly 1,609.344 meters, or 1.609344 kilometers.
In practice, that single relationship drives everything in this guide. Multiply miles by 1.609344 and you get kilometers; divide kilometers by 1.609344 and you get miles. Every number in the charts below comes from that exact factor, rounded sensibly for everyday use: distances to two decimal places, and speeds to one decimal place.
How do you convert miles to kilometers?
To convert miles to kilometers, multiply the number of miles by 1.609344. That is the whole method, and it works for a road trip, a running route, or a race distance.
Follow these steps:
- Take your miles value. For example, 5 miles.
- Multiply by 1.609344. 5 x 1.609344 = 8.04672.
- Round to something usable. For everyday purposes, 8.05 kilometers is plenty. For a race plan, two decimal places is the right level of precision.
Worked examples:
- 5 miles to kilometers: 5 x 1.609344 = 8.05 kilometers.
- 10 miles to kilometers: 10 x 1.609344 = 16.09 kilometers.
- 26.2 miles to kilometers: 26.2 x 1.609344 = 42.16 kilometers, which is why a marathon is described as 42.2 kilometers.
- 100 miles to kilometers: 100 x 1.609344 = 160.93 kilometers.
For a quick estimate in your head, multiply by 1.6 instead. It is close enough for a rough sense of distance (10 miles is roughly 16 kilometers), but use 1.609344 whenever the number matters, such as a race time goal or a fuel calculation. A neat mental trick uses Fibonacci numbers: consecutive Fibonacci numbers approximate the conversion, so 5 miles is about 8 kilometers, 8 miles is about 13 kilometers, and 13 miles is about 21 kilometers. It is an approximation, not an exact conversion, but it is surprisingly handy on the road.
Miles to kilometers (mi to km) conversion chart
Use this chart for the values people look up most often, from half a mile up to 1,000 miles. Kilometers are rounded to two decimal places. If you need a printable version, print this page or save the table: it covers the distances that come up in running, driving, and travel planning.
| Miles (mi) | Kilometers (km) |
|---|---|
| 0.5 mi | 0.80 km |
| 1 mi | 1.61 km |
| 2 mi | 3.22 km |
| 3 mi | 4.83 km |
| 5 mi | 8.05 km |
| 10 mi | 16.09 km |
| 15 mi | 24.14 km |
| 20 mi | 32.19 km |
| 25 mi | 40.23 km |
| 50 mi | 80.47 km |
| 100 mi | 160.93 km |
| 200 mi | 321.87 km |
| 500 mi | 804.67 km |
| 1,000 mi | 1,609.34 km |
If your exact value is not in the chart, use the formula above, or skip the arithmetic entirely with Zyrro’s free unit converter: type any miles value into the Length tab and the kilometers result appears instantly, with no signup and no page reload.
How many miles are common race distances in kilometers?
Running is the biggest reason people convert miles to kilometers, because races are named in kilometers almost everywhere outside the United States, while many runners still think in miles.
| Race | Distance (kilometers) | Distance (miles) |
|---|---|---|
| 5K | 5 km | 3.11 mi |
| 10K | 10 km | 6.21 mi |
| Half marathon | 21.10 km | 13.11 mi |
| Marathon | 42.20 km | 26.22 mi |
Two anchors are worth memorizing: a 5K is just over 3 miles, and a marathon is just over 26 miles. Pace converts the same way, only in reverse: to turn a per-mile pace into a per-kilometer pace, divide by 1.609344, so an 8:00 minute-per-mile pace is about a 4:58 minute-per-kilometer pace. A miles to km pace chart works exactly like the distance chart above, just applied to your pace instead of your total distance.
How do you convert kilometers back to miles?
To convert kilometers to miles, divide the number of kilometers by 1.609344, or multiply kilometers by 0.621371. Both give the same answer; division by 1.609344 is the cleaner route because it uses the same factor as the forward conversion.
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 km | 0.62 mi |
| 5 km | 3.11 mi |
| 10 km | 6.21 mi |
| 50 km | 31.07 mi |
| 100 km | 62.14 mi |
This direction matters just as often: a European road trip measured in kilometers becomes miles for a US driver, and a 100-kilometer cycling event becomes 62.14 miles when you describe it to friends back home. As a check, 100 miles is 160.93 kilometers from the main chart above, so 100 kilometers must be well under 100 miles, and 62.14 miles passes that sanity check.
How do you convert miles per hour to kilometers per hour?
Speed converts with the same factor as distance, because kilometers per hour and miles per hour differ only in the distance unit. To convert miles per hour to kilometers per hour, multiply the mph value by 1.609344.
| Speed (mph) | Speed (km/h) | Where you meet it |
|---|---|---|
| 20 mph | 32.2 km/h | Residential streets |
| 30 mph | 48.3 km/h | Urban speed limit |
| 40 mph | 64.4 km/h | Suburban roads |
| 50 mph | 80.5 km/h | Single carriageways |
| 60 mph | 96.6 km/h | Dual carriageways |
| 70 mph | 112.7 km/h | Motorway speed limit |
This is the conversion that catches drivers out abroad: a 70 mph motorway limit is 112.7 km/h, and a 30 mph urban limit is 48.3 km/h, usually signed as 50 km/h in metric countries.
When do you need miles to kilometers?
This conversion shows up in more places than most people expect:
- Running and fitness: race distances, training plans, and app settings switch between miles and kilometers constantly, and a 5K, 10K, or marathon only makes sense once you know both numbers.
- Driving abroad: rental cars, road signs, and speed limits are in kilometers in most countries, while US drivers think in miles, so every road trip involves this conversion.
- Travel planning: distances between cities, hiking trail lengths, and cycling routes are listed in kilometers in guidebooks and mapping apps outside the US and UK.
- School and exams: science and geography classes use kilometers, while everyday US life uses miles, so homework regularly requires converting in both directions.
- Sports coverage: cycling races, motorsport, and athletics report distances and speeds in kilometers, and converting them helps US audiences follow along.
What mistakes should you avoid?
Most miles-to-kilometers errors come from four simple slips:
- Multiplying when you should divide (and vice versa). Miles to kilometers means multiply by 1.609344; kilometers to miles means divide by 1.609344. Mixing them up gives an answer that is off by a factor of about 2.6, which is easy to spot if you remember that kilometer numbers are always bigger than the same distance in miles.
- Confusing statute miles with nautical miles. A nautical mile is 1,852 meters, or 1.852 kilometers, and it is used in aviation and shipping. It is not the same as the statute mile used on roads, which is 1.609344 kilometers. Using the wrong mile throws every distance off by about 15 percent.
- Rounding too early. Round only at the end. Rounding 1.609344 to 1.6 early is harmless for one conversion, but it drifts if you chain conversions together, for example converting a pace and then a total distance from the same rounded factor.
- Mixing distance and speed. The factor is the same for both, but the units are not interchangeable: 60 miles is 96.56 kilometers as a distance, and 60 mph is 96.6 km/h as a speed. Keep the per-hour part attached whenever you convert a speed, or a speed limit becomes a distance by accident.
Frequently Asked Questions
How many kilometers are in a mile?
One mile equals 1.609344 kilometers, usually rounded to 1.61 kilometers for everyday use. The exact figure comes from the 1959 agreement that defined one foot as exactly 0.3048 meters: one mile is 5,280 feet, and 5,280 times 0.3048 is 1,609.344 meters, or 1.609344 kilometers.
What is the formula to convert miles to kilometers?
Multiply the miles value by 1.609344 to get kilometers: kilometers = miles times 1.609344. For example, 10 miles times 1.609344 equals 16.09 kilometers. For a rough estimate, multiply by 1.6 instead, but use the full factor whenever the distance matters, such as a race time or a travel plan.
How many miles is a 10K run?
A 10K run is 6.21 miles. The K stands for kilometers, so a 10K is 10 kilometers, and 10 divided by 1.609344 equals 6.21 miles. By the same math, a 5K is 3.11 miles, a half marathon is 13.11 miles, and a marathon is 26.22 miles, as shown in the race table above.
How do you convert miles per hour to kilometers per hour?
Multiply the mph value by 1.609344 to get km/h, because speed uses the same distance factor as length. For example, 60 mph times 1.609344 equals 96.6 km/h, and 30 mph equals 48.3 km/h. The speed table above covers the limits drivers meet most often, from residential streets to motorways.
Is a nautical mile the same as a regular mile?
No. A regular road mile, called a statute mile, is 1.609344 kilometers, while a nautical mile is 1.852 kilometers. The nautical mile is based on the circumference of the Earth and is used in aviation and shipping, where one minute of latitude equals one nautical mile. For road distances, running, and driving, always use the statute mile.
How do I convert kilometers to miles?
Divide the kilometers value by 1.609344 to get miles, or multiply kilometers by 0.621371 for the same result. For example, 100 kilometers divided by 1.609344 equals 62.14 miles, and 10 kilometers equals 6.21 miles. The reverse table above covers the values people look up most often.
Converting miles to kilometers is a one-line calculation once you know the factor, but the charts above save you from repeating it every time. Bookmark this page for the next race, road trip, or travel plan, and try Zyrro’s free unit converter for any value the tables do not cover.