Running Toolkit guides
Running Guides
Browse the full article library for calories, pace, race prediction, heart rate, VO2 max, and training decisions.
Written by Mark Portman and published by Hiddenwork Development. Running Toolkit pages are reviewed when formulas, sources, implementation tests, or calculator behavior change. Corrections prioritize transparent formulas, source links, and plain-language limitations. Read the methodology.
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Calories Burned Running by Distance
Compare calories burned running 1 mile, 5K, 10K, half marathon, and marathon, with body-weight tables plus pace, time, and elevation guidance.
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Pace vs Speed for Runners
Compare running pace and speed, learn the conversion formulas, and choose the right metric for workouts, races, and treadmill runs.
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Zone 2 Running Heart Rate
Use a Zone 2 heart rate calculator framework to answer what is my Zone 2 heart rate, apply zone 2 running, and understand why Zone 2 can feel too slow.
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VO2 Max for Runners
Understand VO2 max for runners, what VO2 max running estimates mean, and why performance depends on more than one aerobic number.
Read guidePopular clusters
Common pace, predictor, and calorie guides
Pace charts
Common 5K and 10K pace references for runners moving from calculator intent into chart pages.
Race predictors
Distance-specific prediction guides that connect recent results with race-day pacing.
Calories by distance
Distance-specific calorie guides for one mile, 5K, 10K, half marathon, and marathon searches.
Calories
Calories guides
Energy-cost explainers for distance, weight, pace, elevation, and surfaces.
11 articles
Running MET Values
Understand common running MET values, how MET formulas estimate calories, and why pace, incline, and duration matter.
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Treadmill Calories vs Outdoor Running Calories
Compare treadmill and outdoor running calorie estimates, including incline, speed, wind, and surface differences.
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Calories Burned Running with Elevation Gain
Learn how a running calorie calculator with elevation accounts for hills, incline, treadmill grade, downhill segments, and MET-based estimates.
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Jogging Calories Burned
Estimate jogging calories from pace, duration, weight, and distance, and see when a lower-intensity MET value better reflects the effort.
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Calories Burned Running 1 Mile
Estimate calories burned running one mile and learn why body weight, pace, hills, and duration change the result.
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Calories Burned Running a 5K
Estimate calories burned during a 5K and understand how weight, pace, elevation, and finish time can change the total calorie estimate.
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Calories Burned Running a 10K
Estimate calories burned during a 10K and learn how distance, weight, pace, terrain, and elevation affect the total calorie estimate.
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Calories Burned Running a Half Marathon
Estimate half marathon calories and learn how pace, body weight, duration, and course profile change the total.
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Calories Burned Running a Marathon
Estimate marathon calories and understand how body weight, pace, time, elevation, and fueling affect the number.
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Running Calories Burned by Weight
See why body weight changes running calorie estimates, compare calories burned across distances, and learn when pace or hills matter too.
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Walking vs Running Calories
Compare walking and running calorie estimates and learn why speed, duration, distance, and impact change the result.
Read guidePace
Pace guides
Charts, conversions, and practical pacing references for training and racing.
9 articles
Running Pace Chart
Compare running pace per mile, pace per kilometer, speed, and common race finish times for 5K, 10K, half marathon, and marathon goals.
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5K Pace Chart
Use a 5K pace chart to compare goal finish times, mile pace, kilometer pace, and race-day pacing targets before planning even splits.
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10K Pace Chart
Use a 10K pace chart to compare goal times, mile pace, kilometer pace, and even split targets for workouts and race-day planning.
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Half Marathon Pace Chart
Use a half marathon pace chart to compare goal finish times, mile pace, kilometer pace, pacing strategy, and steady split targets.
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Marathon Pace Chart
Use a marathon pace chart to compare goal times, mile pace, kilometer pace, race-day split planning, and realistic pacing strategy.
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Running Speed Calculator Guide
Learn how running speed relates to pace, mph, km/h, treadmill settings, race goals, and the formulas behind common conversions.
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Minutes Per Mile Chart
Use a minutes-per-mile chart to compare running paces, speeds, and race finish times, then convert common mile paces into kilometer pace.
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Minutes Per Kilometer Chart
Use a minutes-per-kilometer chart to compare running paces, speeds, and race finish times, then convert common kilometer paces into mile pace.
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How to Calculate Running Pace
Calculate running pace from distance and time, with examples for miles, kilometers, races, workouts, and conversions between pace and speed.
Read guideRace Prediction
Race Prediction guides
Goal-time planning, predictors, and race pacing strategy.
6 articles
5K Time Predictor
Use a 5K race time predictor to predict 5K time from a recent race, compare confidence, and turn the result into pace and splits.
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10K Time Predictor
Use a 10K race time predictor to predict 10K time from recent fitness and translate the result into pace and split targets.
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Half Marathon Time Predictor
Use a half marathon race predictor to predict half marathon time from recent results and judge whether the estimate is realistic.
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Marathon Time Predictor
Use a marathon race time predictor to predict marathon time from recent results while accounting for endurance, fueling, and pacing risk.
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Negative Split Running
Learn what negative splits mean, when they help, how they compare with even pacing, and how to plan a faster second half without overcorrecting.
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Even Pacing vs Negative Split
Compare even pacing and negative split strategies for races, workouts, and long runs, including when each approach fits course profile and fitness.
Read guideHeart Rate
Heart Rate guides
Heart-rate zones, max HR, Zone 2, drift, and effort guardrails.
3 articles
Heart Rate Zones by Age
Use heart rate zones by age as a starting point, then understand formula limits, Zone 2 ranges, and when known max HR is better.
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Max Heart Rate for Runners
Learn max heart rate for runners, how max heart rate formula runners use estimates, and when known max heart rate improves training zones.
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Heart Rate Drift Running
Understand heart rate drift running, cardiac drift running, and why heart rate rises during run efforts even when pace stays steady.
Read guideVO2 Max
VO2 Max guides
Field tests, VO2 max context, and aerobic fitness improvement.
3 articles
Cooper Test Standards and VO2 Max Calculator
Understand Cooper 12-minute run test standards, use a Cooper test VO2 max calculator, and interpret 12 minute run VO2 max results.
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VO2 Max Chart by Age
Use a VO2 max chart by age to interpret field estimates, compare broad age ranges, and understand why runner context matters.
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How to Improve VO2 Max for Running
Learn how to improve VO2 max running with aerobic consistency, VO2 max workouts for runners, recovery, and repeatable testing.
Read guideTraining
Training guides
Training pace guidance for easy, recovery, tempo, and threshold work.
4 articles
Easy Run Pace
Learn how to estimate easy run pace from effort, heart rate, race pace, and day-to-day training conditions without turning recovery miles too hard.
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Tempo Run Pace
Learn how to estimate tempo run pace from race results, effort, breathing, and threshold-style workouts without turning tempo days into races.
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Threshold Pace
Understand threshold pace for runners, how it differs from tempo pace, and how to estimate it from recent races.
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Recovery Run Pace
Learn how recovery run pace differs from easy pace, why it should feel lighter, and how to keep recovery days from becoming workouts.
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