Whether you are training for your first 5K or chasing a marathon PR, knowing your pace is essential for smart training and racing. Our free pace calculator instantly converts between distance, time, and pace — and generates split tables for any race distance. Stop running blind and start training with precision.
A pace calculator is a tool that computes running or walking speed in minutes per mile or minutes per kilometer. By entering any two of three variables (distance, time, pace), it solves for the missing one. Pace is the most intuitive speed metric for runners because it directly translates to race-day targets — if your goal is a 4-hour marathon, you need to average 9:09 per mile. Unlike speed (mph), pace tells you exactly how to run each mile to hit your finish time.
Three-way calculation: solve for distance, time, or pace from any two inputs. Common race distance presets: 5K, 10K, half marathon, marathon, and custom. Per-mile and per-km split tables for race planning. Speed conversion (mph, kph). Pace conversion between min/mile and min/km. Negative split planning support. Mobile-friendly for checking pace on the go. Client-side processing for instant results. No registration needed.
The fundamental calculation is straightforward: Pace = Time ÷ Distance. Time = Pace × Distance. Distance = Time ÷ Pace. The calculator parses time inputs (hours:minutes:seconds), handles unit conversions between miles and kilometers, and generates a complete split table showing cumulative time at each distance marker. For negative split planning, it adjusts early miles to be slightly slower and later miles slightly faster while maintaining the same overall finish time.
Race Planning — Setting target pace and printing split tables for 5K through marathon. Training Zone Calculation — Determining easy, tempo, interval, and race pace zones from recent race results. Finish Time Prediction — Estimating finish time for a new distance based on current pace. Walking Fitness — Calculating walking pace for daily exercise and step-count goals. Treadmill Calibration — Converting desired pace to treadmill speed setting. Race Comparison — Comparing pace across different race distances. Relay Planning — Calculating leg times for relay team members.
Running by pace transforms training from guesswork into science. Without pace awareness, most runners train too hard on easy days and too easy on hard days. Our calculator helps you set appropriate targets for every type of workout — from recovery jogs to race-day efforts. The split table feature is particularly valuable for race execution, giving you mile-by-mile checkpoints to stay on target. It is free, instant, and works on any device.
Runners of all levels from 5K beginners to ultramarathon veterans. Walkers tracking fitness and improvement. Coaches planning workouts and race strategies. Triathlon athletes calculating run leg targets. Treadmill users converting pace to speed settings. Race directors planning course timing. Running clubs organizing group workouts by pace.
Start by entering a recent race result — your distance and finish time — to see your current pace. Then enter your goal distance and target pace to see the required finish time. Use the split table to plan your race strategy. For training, calculate your easy pace (add 60 seconds to your race pace per mile) and use that for most runs. Bookmark the calculator on your phone for quick access during training.
Train Slower Than You Think — 80% of runs should be at easy pace (conversational). Race With a Plan — Print split tables and wear them during races. Be Honest About Fitness — Base targets on recent race performances, not aspirations. Adjust for Conditions — Add 10–30 seconds per mile in heat, humidity, or hills. Negative Split — Start 10–15 seconds slower than goal pace and build. Practice Race Pace — Include tempo runs at goal race pace in your training. Don't Chase Pace on Every Run — Some days focus on time, others on effort.
Pace calculations assume flat terrain and ideal conditions. Hills, wind, heat, and altitude will affect actual pace. Predicted finish times for new distances are estimates — performance does not scale linearly across distances. Treadmill pace may differ from outdoor pace due to lack of wind resistance and belt assistance. Individual factors (fitness, fueling, race-day conditions) significantly affect actual performance versus calculated targets.
Pace is calculated by dividing total time by distance. If you ran 3.1 miles (5K) in 24:00, your pace is 24 ÷ 3.1 = 7:44 per mile. Conversely, if you ran 5 km in 24:00, your pace is 24 ÷ 5 = 4:48 per km. Our calculator handles these conversions automatically — enter any two values (distance, time, pace) and it computes the third. It also converts between min/mile and min/km and shows speed in mph and kph.
For beginner runners: Walking pace is 15–20 min/mile (9:20–12:25 min/km). Jogging pace is 10–13 min/mile (6:13–8:05 min/km). Beginner running pace is 9–12 min/mile (5:35–7:27 min/km). These are general ranges — your pace depends on age, fitness, and terrain. The key for beginners is to run at a conversational pace (able to speak in full sentences). Speed improves naturally as you build your aerobic base over 8–12 weeks of consistent training.
Negative splits mean running the second half of a race faster than the first half. Example: For a 4:00 marathon goal (9:09/mile pace), you might run the first half in 2:02 (9:19/mile) and the second half in 1:58 (9:00/mile). This strategy works because: Starting conservatively preserves glycogen for later miles. You avoid early oxygen debt that leads to late-race collapse. Psychologically, passing people in the final miles is motivating. Most world records and elite performances use negative splits.
Divide your target finish time by the race distance for an even-split strategy. For a 2:00 half marathon (13.1 miles): 120 min ÷ 13.1 = 9:09/mile. Our calculator generates a full split table showing cumulative time at each mile or kilometer marker. For negative splits, add 10–15 seconds per mile to the first half and subtract the same from the second half. Print your split table and tape it to your wrist or arm for race-day reference.
As a general rule, expect 12–20 seconds per mile slower for every 100 feet (30m) of elevation gain, and 5–8 seconds faster per 100 feet of descent. For hilly courses, focus on effort level rather than pace — run by feel on hills and recover on downhills. A course with 500 feet of total climb might add 1–2 minutes to your finish time compared to a flat course. GPS watches often show erratic pace on hills; heart rate or perceived effort are better guides in hilly terrain.
Training paces are typically categorized as: Easy/Recovery (60–65 seconds slower than race pace) for building aerobic base. Long Run pace (30–60 seconds slower) for endurance development. Tempo/Threshold pace (15–20 seconds slower) for improving lactate threshold. Interval pace (10–20 seconds faster) for VO2max development. Repetition pace (fastest) for running economy. Most training (80%) should be at easy pace, with only 20% at tempo or faster (the 80/20 rule).
Temperature: Performance peaks at 40–55°F (4–13°C). Above 60°F, expect 1–3% slowdown per 10°F increase. At 80°F+, pace may slow 10–20% for safety. Humidity above 60% compounds heat effects by impairing sweat evaporation. Wind: A 10 mph headwind slows pace by 10–15 seconds per mile; tailwinds help less than headwinds hurt. Rain: Minimal pace effect but reduces grip. Cold below 30°F: Slightly slower warm-up but minimal steady-state impact.
To convert min/mile to min/km: multiply by 0.6214 (or divide by 1.609). Example: 8:00/mile = 4:58/km. To convert min/km to min/mile: multiply by 1.609 (or divide by 0.6214). Example: 5:00/km = 8:03/mile. Our calculator does this automatically. Quick reference: 6:00/mile ≈ 3:43/km, 7:00/mile ≈ 4:21/km, 8:00/mile ≈ 4:58/km, 9:00/mile ≈ 5:35/km, 10:00/mile ≈ 6:13/km.