Target Pace from Goal Time Calculator
A target pace tells you how fast you must run, on average, to reach a goal finish time over a set distance. It is the single most useful number for planning a race: hold it and you finish on target, drift above it and you fall behind, dip below it and you bank time. This calculator takes your goal time and the race distance, then divides one by the other to give the pace you must average, shown both per mile and per kilometer so it works for US races and international ones alike. Enter a marathon goal of four hours over 42.195 kilometers and the tool returns about 5 minutes and 41 seconds per kilometer, which is roughly 9 minutes and 9 seconds per mile. You can adjust the goal time or distance to plan a 5K, a 10K, a half marathon or any custom distance, and instantly see how a faster or slower target changes the pace you must hold. Every figure is computed deterministically from the simple pace formula, time divided by distance, shown in full below with a worked example that reconciles exactly to the calculator. Use it to set realistic splits and pace your training runs with confidence.
Target pace is your goal time divided by the distance: pace = time / distance. A 4:00:00 marathon goal over 42.195 km needs an average pace of about 5:41 per km (about 9:09 per mile). Hold that pace and you finish on target.
Target pace formula
pace = goal time / distance
total seconds = (hours x 3600) + (minutes x 60) + seconds
pace per unit = total seconds / distance in that unit
1 mile = 1.609344 kilometers
The goal time is converted to seconds, then divided by the distance to give seconds per unit. Dividing by the distance in kilometers gives the per-kilometer pace; dividing by the distance in miles gives the per-mile pace.
Worked example
A goal of 4 hours and 0 minutes for a marathon of 42.195 kilometers.
- Total seconds = 4 x 3,600 = 14,400 seconds
- Pace per km = 14,400 / 42.195 = 341.27 seconds = 5 minutes 41 seconds per km
- Distance in miles = 42.195 / 1.609344 = 26.2188 miles
- Pace per mile = 14,400 / 26.2188 = 549.22 seconds = 9 minutes 9 seconds per mile
These are the calculator's default inputs, so the result above matches the widget exactly.
Target pace calculator: frequently asked questions
How do I work out my target race pace?
Divide your goal finish time by the race distance. If the goal is four hours for a marathon of 42.195 kilometers, that is 14,400 seconds divided by 42.195, which is about 341 seconds per kilometer, or 5 minutes and 41 seconds per kilometer. Per mile it is the goal time divided by the distance in miles. This calculator does the division for you and shows both units.
What is the difference between pace per mile and pace per kilometer?
Pace per mile is the time to cover one mile; pace per kilometer is the time to cover one kilometer. One mile is 1.609344 kilometers, so a per-mile pace is always a larger number of minutes than the matching per-kilometer pace. US races usually post mile splits, while most of the world uses kilometer splits, so this tool shows both from the same goal time.
Should I run even splits to hit my goal?
Even or slightly negative splits, where the second half is run at the same pace or a little faster than the first, are a common way to reach a goal time without fading. The target pace here is the average you must average across the whole distance. Going out faster than target early often costs more time later than it saves.
How much faster do I need to be to beat my goal?
Each second per mile or per kilometer saved is multiplied by the number of miles or kilometers in the race. Over a marathon, trimming two seconds per kilometer saves about 84 seconds overall. Small, sustainable pace changes add up over long distances, which is why pacing discipline matters more than a single fast mile.
Is faster running always better for health?
Not necessarily. The US Centers for Disease Control and Prevention notes that regular moderate activity delivers most cardiovascular benefit, and that building volume gradually reduces injury risk. Treat a goal pace as a training target, not a daily requirement, and increase intensity slowly.
Official sources
- Physical activity guidance and safe training progression: US Centers for Disease Control and Prevention (CDC). As at 25 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.