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Instantly calculate your running pace, total finish time, or total distance covered. Generates highly precise split times for 5Ks, Half Marathons, and Full Marathons. This free online tool allows you to calculate running pace quickly and accurately. No sign-up or installation required.
In endurance running, there are three fundamental metrics: Pace (how fast you run each mile/km), Distance (how far you run), and Time (how long the run takes). This relationship is entirely mathematical. If you know any two of these metrics, you can perfectly calculate the third.
Our multi-functional calculator allows you to solve for any missing variable, making it an essential tool for race day planning, interval training, and weekly mileage tracking.
Select a target distance (e.g., a Marathon) and your goal finish time (e.g., Sub 4 Hours). The calculator will reveal the exact minute-per-mile pace you must hold for the entire race.
Know your comfortable average training pace? Input it alongside your upcoming race distance to predict exactly what time you will cross the finish line.
If you only have 45 minutes to exercise before work and you run at a 9:00 min/mile pace, this tab will tell you exactly how far away from home you can travel.
Whenever you calculate Pace or Time, our tool automatically generates a detailed table of Split Times. A split time is the exact duration it should take you to reach each specific mile or kilometer marker on the course.
During long-distance races, adrenaline is incredibly high. Most amateur runners make the fatal mistake of running the first 3 miles far faster than their target pace. This prematurely burns through muscle glycogen, leading to a catastrophic drop in energy later in the race (often referred to as "hitting the wall").
Experienced marathon runners write their split times on their forearm or wear a temporary tattoo pace band. When they pass the Mile 5 marker, they check their watch against their split time. If they arrive 2 minutes early, they purposefully slow down to conserve energy. Perfect pacing is about discipline, not just speed.
| Event Name | Kilometers (Metric) | Miles (Imperial) |
|---|---|---|
| 5K | 5.0 km | 3.107 mi |
| 10K | 10.0 km | 6.214 mi |
| Half Marathon | 21.0975 km | 13.109 mi |
| Marathon | 42.195 km | 26.219 mi |
Expert advice on pacing strategies, beginner benchmarks, and race day execution.