Pace · Speed · Time — Any Two → Compute the Third

How it Works

This tool treats pace and speed as exact inverses and uses distance to link them to total time:

• Pace = time / distance (e.g., min/km or min/mi)
• Speed = distance / time (e.g., km/h or mph)
• Time = pace × distance = distance / speed

Switching km/mi converts pace, speed, and distance automatically. All math runs locally in your browser.

Understanding Pace, Speed, and Time for Walking & Running

Pace, speed, and time describe the same motion from different angles. Pace is the time it takes to cover one unit of distance (min/km or min/mi). Speed is how much distance you cover per hour (km/h or mph). Time is the duration for a chosen distance. The relationships are simple: pace = time ÷ distance, speed = distance ÷ time, and time = pace × distance = distance ÷ speed. Once you know any two, the third is determined.

Typical Ranges (Approximate)

• Walking: easy stroll ≈ 3–4 km/h (1.9–2.5 mph) → ~15–20 min/km (24–32 min/mi); brisk fitness walk ≈ 5–6.5 km/h (3.1–4.0 mph) → ~9–12 min/km (15–19 min/mi).
• Jogging/Running: many recreational runners cruise around 8–12 km/h (5–7.5 mph) → ~5–7:30 min/km (8–12 min/mi). Faster training and racing can be well beyond these ranges.

Quick Conversions You’ll Use Often

• min/mi ↔ min/km: multiply or divide by 1.609. Example: 6:00 min/km ≈ 9:39 min/mi; 10:00 min/mi ≈ 6:13 min/km.
• Pace ↔ Speed: speed = 60 ÷ (min per mile) (mph) or speed = 60 ÷ (min per km) (km/h). Example: 5:00 min/km → 12.0 km/h; 10:00 min/mi → 6.0 mph.
• Race time: time = pace × distance. Example: 5:40 min/km over 10 km ≈ 56:40.

How to Use This in Training

• Set intentions by time, not ego: Decide whether today is an easy walk, aerobic jog, or sharper run. Choose a time window and corresponding pace band to keep the effort honest.
• Monitor trendlines: Track the same loop over several weeks. If your pace improves at the same heart rate or perceived effort, fitness is likely rising.
• Account for terrain: Hills slow pace but not necessarily fitness. On rolling routes, use time on feet or average speed to judge the session instead of fixating on pace spikes.
• Use the “talk test” for effort: Comfortable conversation usually aligns with an easy aerobic pace; broken sentences hint you’re moving into a steadier or tempo effort.

Common Mistakes to Avoid

• Mixing units: If you switch between km and miles, convert all values—pace, speed, and distance—to keep calculations consistent.
• Chasing pace on hot days: Heat and humidity reduce speed at the same effort. Adjust goals and hydrate according to conditions.
• Ignoring distance precision: Treadmills, watches, and apps can differ. For planning, round pace/speed reasonably; for testing, compare like with like.

Whether you’re walking for wellness or training to run a 5K, understanding the triangle of pace, speed, and time makes planning simple: pick two that match your goal and conditions, and let this calculator solve the third. Small, consistent improvements—no matter the starting point—compound over weeks and months.