How do I calculate my running pace?

Divide your total time (in minutes) by your distance. For example, if you ran 5 miles in 45 minutes, your pace is 45 ÷ 5 = 9:00 per mile. Use this calculator by entering your distance and finish time in the Pace mode.

What is a good running pace?

It depends on your fitness level and goals. The average recreational runner runs at 9–11 min/mile (5:35–6:50 min/km). Competitive amateur runners average 7–9 min/mile. Elite marathoners run under 5 min/mile. A 'good' pace is one that challenges you without being unsustainable.

How fast should a beginner run?

Beginners should run at a conversational pace — slow enough to hold a full sentence without gasping. This is typically 10–12 min/mile (6:15–7:30 min/km) for most people. The goal is completing the distance comfortably, not speed. Speed comes with consistent training.

How do I convert pace to speed (mph or km/h)?

To convert pace to speed: Speed (mph) = 60 ÷ pace (min/mile). For example, a 10:00/mile pace equals 60 ÷ 10 = 6.0 mph. For metric: Speed (km/h) = 60 ÷ pace (min/km). A 6:00/km pace equals 60 ÷ 6 = 10.0 km/h.

What pace do I need to finish a marathon in 4 hours?

To finish a marathon (26.2 miles / 42.2 km) in 4:00:00, you need to maintain a pace of 9:09 per mile (5:41 per km). Use the Finish Time mode in this calculator — enter your target distance and goal time to find your required pace.

What is the difference between pace and speed?

Pace measures how long it takes to cover one unit of distance (e.g., 8 minutes per mile). Speed measures how much distance you cover per unit of time (e.g., 7.5 mph). They are reciprocals: faster speed = lower pace number. Runners typically use pace; cyclists and most fitness apps also use speed.

Running Pace Calculator

Running pace is the time it takes to cover one unit of distance — usually expressed as minutes per mile (min/mi) or minutes per kilometer (min/km). Knowing your pace helps you train smarter: running too fast leads to burnout, too slow means missing your training target. This calculator works in all three modes: given distance and time it finds pace; given pace and time it finds distance; given distance and pace it finds finish time. It also predicts race times across all standard distances and converts between metric and imperial units.

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calendar_today Updated: July 2025

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Unit:

Distance

Time

hrs

min

sec

Quick set distance

Your Pace

6:00 /km

9:39 /mi

Speed

10.0 km/h

Finish Time

30:00

Race Finish Predictions

Input Values

Calculate

Find Pace

Find Time

Find Distance

Distance

Unit

miles

lightbulb Tips

•80% of weekly runs should be at easy pace
•Train 1–2 min/km slower than your goal race pace
•Negative splits (faster 2nd half) beat even pace
•Pace slows by ~1% per °C above 15°C in heat

How to Use This Calculator

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Select Calculation Mode

Choose what you want to find: Find Pace (from distance and time), Find Time (from pace and distance), or Find Distance (from pace and time).

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Enter Your Values

Fill in the two known values — distance (in km or miles) and your time (hours, minutes, seconds) — then select your preferred unit of measurement.

speed

View Your Results

Your calculated pace, speed, and finish time appear instantly. Race finish time predictions for 5K, 10K, half marathon, and marathon are shown automatically.

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Use Results for Training

Note your target pace and use it to set treadmill speed or GPS watch alerts. Apply the 80/20 rule — run 80% of weekly miles at easy pace (1–2 min/mile slower than race pace).

The Formula

The three running metrics — pace, time, and distance — are linked by one simple equation. Given any two, you can always find the third. Pace (min/mile) = total minutes ÷ total miles. Finish time (min) = pace × distance. Speed (mph) = 60 ÷ pace (min/mile). For metric: replace miles with kilometers throughout.

Pace = Time ÷ Distance | Finish Time = Pace × Distance | Distance = Time ÷ Pace

lightbulb Variables Explained

Pace Minutes per mile or km — how long it takes to cover one unit of distance
Time Total elapsed time in hours, minutes, and seconds
Distance Total distance covered in miles or kilometers
Speed mph or km/h — the reciprocal of pace: Speed = 60 ÷ Pace (min/unit)

tips_and_updates Pro Tips

For a marathon PR, train at 1–2 min/mile slower than your goal pace on easy days.

The 80/20 rule: 80% of weekly runs at easy pace, 20% at race pace or faster.

A 5K pace is roughly 30 seconds/mile faster than 10K pace for most runners.

Heart rate zones are more reliable than pace alone in heat, humidity, or altitude.

Negative splits (running the second half faster) consistently beat positive splits for race performance.

Running Pace and Race Time Predictions

Running pace — the time it takes to cover a specific distance, typically expressed as minutes per mile or minutes per kilometer — is the most important metric for runners of all levels. Whether you are training for your first 5K, targeting a sub-4-hour marathon, or planning interval workouts, understanding your pace helps you set realistic goals, avoid going out too fast on race day, and track fitness improvements over time. The relationship between pace, speed, and finish time is straightforward but easy to miscalculate mentally during a run. Our running pace calculator converts instantly between pace (min/mile or min/km), speed (mph or km/h), and finish times for standard race distances from 5K to ultramarathon. Enter any two values and get the third, plus equivalent paces and predicted finish times for all common race distances using established prediction formulas that account for the natural slowdown over longer distances.

Understanding pace zones for training

Effective training uses different pace zones for different purposes. Easy/recovery pace (60-70% max heart rate) is typically 1-2 minutes per mile slower than 5K race pace — for a 25-minute 5K runner (8:03/mile pace), easy pace would be 9:30-10:00/mile. Tempo/threshold pace sits at roughly 25-30 seconds per mile slower than 5K pace, sustainable for 20-40 minutes. Interval pace matches approximately 5K race pace or faster, run in 400m-1600m repeats with rest. Long run pace is similar to easy pace, building aerobic endurance. The 80/20 rule suggests 80% of weekly mileage should be at easy pace — most recreational runners make the mistake of running too fast on easy days, which increases injury risk and hampers recovery without meaningful fitness gains.

Race time prediction formulas

Predicting finish times across distances uses established ratios. The simplest method multiplies times: marathon ≈ half marathon × 2.1 (not 2.0, due to fatigue). More sophisticated formulas like Pete Riegel's T2 = T1 × (D2/D1)^1.06 account for the exponential slowdown over distance. A runner finishing 5K in 25:00 can expect approximately: 10K in 52:05, half marathon in 1:55:30, and marathon in 4:03:00. These predictions assume equivalent training — a 25-minute 5K runner doing only 20 miles per week will likely run slower marathons than predicted because endurance hasn't been developed. Factors like heat (+2-5% slower above 55°F/13°C), hills, humidity, and course elevation profile also affect actual times significantly.

Converting between pace and speed

Pace and speed are inversely related: Speed (mph) = 60 / Pace (min/mile). A 10:00/mile pace equals 6.0 mph; an 8:00/mile pace equals 7.5 mph; a 6:00/mile pace equals 10.0 mph. For metric: Speed (km/h) = 60 / Pace (min/km). To convert between mile and kilometer pace: min/km = min/mile × 0.6214, or min/mile = min/km × 1.6093. A 5:00/km pace equals 8:03/mile. Treadmills display speed rather than pace, which causes confusion — setting 6.5 mph gives a 9:14/mile pace, while 8.0 mph gives 7:30/mile. For interval training, knowing speed equivalents helps set treadmill speeds: a target 400m in 90 seconds requires 6:00/mile pace = 10.0 mph.

Frequently Asked Questions

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