Welcome to a group of calculators which will give you all the pace information you need to prepare for a marathon or half-marathon.

They allow you to compensate for the drop in pace most of us experience towards the end of a race. Then again, if you're really fit and confident, you can predict times based on negative splits.

You can plan from the pace you expect to run, or from the overall time you're aiming at.

The calculators require your browser to handle JavaScript, and you should not have any problems if you are using a recent version of Netscape or Internet Explorer.

To calculate from your target PACE: 1. Enter the pace you plan to run in minutes and seconds. 2. If applicable, enter the pace you expect to slow down to towards the end of the race. To get negative splits, enter the pace you expect to increase to rather than a slower pace. 3. Enter the distance to apply this fade from. 4. Click on 'Calculate now' to get a reading of:

To calculate from your target FINISH TIME: 1. Enter your target time in hours and minutes. On the half-marathon chart the target time can also be entered just in minutes. 2. Enter the amount of fade. This is how much you expect to slow down and can be entered as seconds per kilometre or mile, or as a percentage. To get negative splits, enter the amount of fade as a negative value by preceding it with a minus sign. 3. Select the type of calculation required. 4. Enter the distance to apply this fade from. 5. Click on 'Calculate now' to get a reading of:

      OVERALL average kilometre or mile pace regardless of fade.
      AVERAGE kilometre or mile pace before your fade mark.
      AVERAGE kilometre or mile pace after fade takes effect
      SPLITS for every kilometre or mile, with 5km or 3-mile splits
      highlighted.
      HALF-MARATHON split.
      FINAL time based on calculated splits.

The results chart is designed to be printed out on an A4 sheet of paper.

The following links will get you to calculators for: