Other Services

While you may be able to time yourself over a mile or kilometer and use that to predict your time for a 5K or 10K race, you probably won't be able to maintain the same speed over a half marathon or marathon. Ways to predict your finish time vary.

Some runners add 20 seconds per mile each time you double your distance. For example, if you've run a half marathon (13.1 miles), find your average minutes per mile, add 20 seconds, and multiply by 26.2 miles. Marathon coach Hal Higdon suggests multiplying your 10-kilometer finish time by 5 to find your marathon finish time.

• Avoid scams by acting locally or paying with PayPal
• Never pay with Western Union, Moneygram or other anonymous payment services
• Don't buy or sell outside of your country. Don't accept cashier cheques from outside your country
• This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer "buyer protection" or "seller certification"