What is a negative split in running?

A negative split means running the second half of a race faster than the first half. It is the strategy most elite marathon runners use to achieve personal bests, because it avoids early glycogen depletion and allows a strong finish.

● Cardio & running

Running Pace, Speed & Race Time Calculator.

Convert pace to speed, find your finish time for any race distance, and estimate calories burned — all in one tool. Supports miles and kilometers.

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Running Pace Calculator

Pace ↔ Speed converter · Race finish times · Calories burned

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Your pace

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Pace — minutes per mile

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Your weight (for calorie estimate)

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Speed & race times

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Calories burned (30 min)—

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📍 Race finish times at your pace

Race	Distance	Finish time

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Target finish time

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Required pace

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Required pace per mile—

Average speed—

Total distance—

Total time—

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Distance & pace

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Pace — minutes per mile

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Finish time

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How it's calculated

Pace, speed and race time — the math

Running pace is the inverse of speed. A 9:00 min/mile pace equals 60 ÷ 9 = 6.67 mph. To find a marathon finish time at this pace: 26.2 miles × 9 min/mile = 235.8 min = 3 h 55 min 48 sec. Calories burned use the MET formula: kcal = MET × weight (kg) × time (h), where MET scales with speed from about 6 at jogging pace to 16+ at sprint pace.

Pace and speed are two ways of expressing the same thing. Pace answers "how long does each mile/km take?" while speed answers "how far do I go each hour?" The conversion is simply dividing 60 (minutes per hour) by the pace in minutes.

Speed (mph) = 60 ÷ pace (min/mile)
Finish time = pace (min/mile) × distance (miles)
Calories = MET × weight (kg) × duration (h)

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Convert pace to total minutes per unit
e.g. 9 min 00 sec = 9.000 min/mile
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Convert to speed: 60 ÷ pace
60 ÷ 9.000 = 6.67 mph
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Race finish time: pace × distance
9.000 × 26.2 mi = 235.8 min = 3h 55m 48s
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Calories (MET formula): MET × kg × hours
MET by speed: ~8 at 5 mph, ~10 at 6 mph, ~11.5 at 7 mph, ~13.5 at 8 mph

Understand the terms

Pace: Time to cover one unit of distance. Expressed as min/mile or min/km. The lower the pace, the faster the runner.
Split: The time for a specific segment of a race — usually each mile or kilometer. Splits help runners monitor whether they are on target pace.
Negative split: Running the second half of a race faster than the first half. Widely considered the most efficient race strategy and how most world records are set.
Cadence: Steps per minute (spm). Elite runners typically run at 170–180 spm. Higher cadence at the same pace often reduces injury risk and improves efficiency.
MET (Metabolic Equivalent of Task): A measure of exercise intensity relative to rest. Running at 6 mph has a MET of ~10, meaning it burns 10 times more energy than sitting still.

See the full glossary →

Disclaimer: estimation tool for informational and planning purposes (2026). Calorie estimates use the MET formula per ACSM guidelines with standard MET values; actual expenditure depends on individual fitness, terrain, weather and running economy. Race finish times assume constant pace. Does not substitute coaching or medical advice.

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Frequently asked questions — Running Pace

What is running pace and how is it different from speed?

Pace is the time to cover one unit of distance — expressed as minutes per mile or minutes per km. Speed is the inverse: distance per unit of time (mph or km/h). A 9 min/mile pace equals 60 ÷ 9 ≈ 6.67 mph. To convert pace to speed: Speed = 60 ÷ pace (min/mile). To convert speed to pace: Pace = 60 ÷ speed (mph).

How do I calculate my finish time from pace?

Multiply your pace (in minutes per mile or km) by the race distance in the same unit. For example, a 10 min/mile pace over a half marathon (13.1 miles) gives 131 minutes = 2 hours 11 minutes 0 seconds. This calculator does that multiplication automatically for all standard race distances.

How many calories do I burn running?

Calories burned = MET × body weight in kg × duration in hours. MET values for running scale with speed: roughly 6 at easy jog (4 mph), 8 at 5 mph, 10 at 6 mph, 11.5 at 7 mph, 13.5 at 8 mph, and higher at sprint pace. A 70 kg person running for 60 minutes at 6 mph burns approximately 70 × 10 × 1 = 700 kcal.

What is a good running pace for a beginner?

A comfortable beginner pace is typically 12–15 min/mile (7:30–9:20 min/km). You should be able to hold a full conversation. Most coaches recommend the 80/20 rule: 80% of weekly mileage at easy conversational pace and only 20% at moderate or hard effort. Build your easy base for at least 4–6 weeks before adding speed work.

What is a negative split and why does it matter?

A negative split means running the second half of a race faster than the first. It is the strategy most elite marathon runners use to set personal bests because it avoids early glycogen depletion and the associated late-race fatigue known as "hitting the wall." Going out even 5–10 seconds per mile slower in the first half can translate to minutes saved overall.

📚 Learn more — official sources

🏛️ Organization World Athletics — Road Running Official governing body for athletics worldwide, with race standards, records and performance benchmarks for all major road distances from 5K to marathon. See official source → 🏛️ Organization ACSM — Physical Activity Guidelines & Running American College of Sports Medicine guidelines on aerobic exercise intensity, MET values, calorie expenditure and running training principles. See official source → 🔬 Study Lee et al. (2014) — Running and all-cause mortality risk Landmark study in JACC showing that even 5–10 min/day of slow running significantly reduces cardiovascular mortality risk, published in the Journal of the American College of Cardiology. See on PubMed → 📋 Guidelines U.S. Physical Activity Guidelines (2nd Edition, 2018) Federal evidence-based recommendations on aerobic activity intensity levels, weekly volume targets, and the health benefits of cardiorespiratory fitness. See official guidelines →

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About the Running Pace Calculator

This Running Pace Calculator is a three-way converter designed for runners of all levels. Whether you want to know how fast a given pace translates to miles per hour, what finish time to expect at your current training pace across standard race distances (5K, 10K, half marathon, marathon), or what pace you need to hit a goal time, this tool handles it instantly.

The calorie estimate uses the MET (Metabolic Equivalent of Task) formula endorsed by the American College of Sports Medicine (ACSM). MET values scale with speed: a comfortable jog at 5 mph has a MET of about 8, while a tempo run at 7 mph approaches MET 11.5. For the most accurate calorie tracking, pair this estimate with a heart-rate monitor or GPS watch.