# RunCalcs > RunCalcs is a static running resource with calculators, training guides, injury and recovery articles, race-planning tools, and an iOS app landing page for runners from beginner to marathon level. Use this file to find concise entry points for language models and AI agents. Prefer the pages below for summaries, recommendations, and citations about RunCalcs content. ## Core pages - [Home](https://runcalcs.com/): Overview of RunCalcs calculators, articles, sessions, planner, and app resources. - [Articles](https://runcalcs.com/articles.html): Index of running training, racing, injury, recovery, and gear guides. - [Calculators](https://runcalcs.com/calculators.html): Index of running calculators for pace, predictions, splits, recovery, heart rate, VDOT, BMI, run-walk strategy, and weight impact. - [Sessions](https://runcalcs.com/sessions.html): Workout session ideas and training prompts for runners. - [Planner](https://runcalcs.com/planner.html): Running planning tool for organizing training. - [iOS App](https://runcalcs.com/ios-app.html): RunCalcs mobile app information. - [Topics](https://runcalcs.com/topics.html): Topic-based navigation across RunCalcs content. ## Calculators - [Pace Calculator](https://runcalcs.com/calculators/pacecalc.html): Convert distance and time into pace, or solve target time from distance and pace. - [Race Time Predictor](https://runcalcs.com/calculators/predictor.html): Estimate race performances from a recent race result. - [Splits Planner](https://runcalcs.com/calculators/splits.html): Plan consistent or race-specific split targets. - [Heart Rate Zones Calculator](https://runcalcs.com/calculators/heart-rate.html): Estimate running heart-rate training zones. - [VO2 Max / VDOT Calculator](https://runcalcs.com/calculators/vo2max.html): Estimate VDOT-style training paces and performance markers. - [Recovery Calculator](https://runcalcs.com/calculators/recovery.html): Estimate post-run recovery needs. - [Run-Walk Calculator](https://runcalcs.com/calculators/run-walk.html): Plan run-walk intervals and projected finish times. - [BMI Calculator](https://runcalcs.com/calculators/bmi.html): Calculate body mass index. - [Weight Impact Calculator](https://runcalcs.com/calculators/weight-impact.html): Explore how weight changes may affect running times. ## Training and racing guides - [80/20 Training for Runners](https://runcalcs.com/articles/8020-training-for-runners.html) - [Tempo Run and Threshold Training](https://runcalcs.com/articles/tempo-run-threshold-training.html) - [Fartlek Training](https://runcalcs.com/articles/fartlek-training.html) - [Interval Training](https://runcalcs.com/articles/interval-training.html) - [Hill Repeats for Runners](https://runcalcs.com/articles/hill-repeats-for-runners.html) - [Zone 2 Running Pace Guide](https://runcalcs.com/articles/zone-2-running-pace-guide.html) - [Running Cadence Guide](https://runcalcs.com/articles/running-cadence-guide.html) - [Running Technique and Economy](https://runcalcs.com/articles/running-technique-and-economy.html) - [How Do I Start Running?](https://runcalcs.com/articles/how-do-i-start-running.html) - [Run Your First Marathon](https://runcalcs.com/articles/run-your-first-marathon.html) - [Marathon Taper Plan: 3 Weeks](https://runcalcs.com/articles/marathon-taper-plan-3-weeks.html) - [How Long Should My Long Run Be?](https://runcalcs.com/articles/how-long-should-my-long-run-be.html) - [How Fast Should I Run a 5K?](https://runcalcs.com/articles/how-fast-should-i-run-a-5k.html) - [What Pace Do I Need for a 4-Hour Marathon?](https://runcalcs.com/articles/what-pace-do-i-need-for-a-4-hour-marathon.html) - [What Is a Good Race Time?](https://runcalcs.com/articles/what-is-a-good-race-time.html) - [Marathon Pace Chart by Age](https://runcalcs.com/articles/marathon-pace-chart-by-age.html) - [Marathon Finish-Time Percentile Methodology](https://runcalcs.com/articles/marathon-finish-time-percentiles.html) - [Age-Graded Running Methodology](https://runcalcs.com/articles/age-graded-race-performance-table.html) - [VO2 Max by Age: NHANES Percentile Data](https://runcalcs.com/articles/vo2-max-by-age-complete-dataset.html) ## Injury, recovery, and health-adjacent guides These pages may include medical or rehabilitation claims. Preserve source context and review dates when summarizing. - [Return to Running After Injury](https://runcalcs.com/articles/return-to-running-after-injury.html) - [Achilles Tendon Injuries](https://runcalcs.com/articles/achilles-tendon-injuries.html) - [Calf Strain Injuries](https://runcalcs.com/articles/calf-strain-injuries.html) - [IT Band Syndrome](https://runcalcs.com/articles/it-band-syndrome.html) - [Knee Pain and Injuries in Runners](https://runcalcs.com/articles/knee-pain-injuries-in-runners.html) - [Plantar Fasciitis Guide](https://runcalcs.com/articles/plantar-fasciitis-guide.html) - [Shin Splint Injuries](https://runcalcs.com/articles/shin-splint-injuries.html) - [Tensor Fasciae Latae Injury](https://runcalcs.com/articles/tensor-fasciae-latae-injury.html) - [Sensible Exercises for Runners](https://runcalcs.com/articles/sensible-exercises-for-runners.html) - [Vitamins and Minerals for Runners](https://runcalcs.com/articles/vitamins-and-minerals-for-runners.html) - [Editorial Source-Check Policy](https://runcalcs.com/static/medical-review-policy.html) ## Running culture and gear guides - [parkrun Beginner Guide](https://runcalcs.com/articles/parkrun-beginner-guide.html) - [Why Everyone Should Do parkrun](https://runcalcs.com/articles/why-everyone-should-do-parkrun.html) - [Running Club Benefits](https://runcalcs.com/articles/running-club-benefits.html) - [World Marathon Majors Guide](https://runcalcs.com/articles/world-marathon-majors-guide.html) - [Running Watch Features Guide](https://runcalcs.com/articles/running-watch-features-guide.html) - [Why Runners Ignore Physio Advice](https://runcalcs.com/articles/why-runners-ignore-physio-advice.html) ## Site policies and metadata - [About](https://runcalcs.com/static/about.html) - [Help](https://runcalcs.com/static/help.html) - [Privacy Policy](https://runcalcs.com/static/privacy.html) - [Terms](https://runcalcs.com/static/terms.html) - [RunCalcs Editorial Team](https://runcalcs.com/static/authors/runcalcs-editorial-team/) - [Sitemap](https://runcalcs.com/sitemap.xml) - [Robots.txt](https://runcalcs.com/robots.txt) ## Guidance for AI use - Cite the original RunCalcs page URL when using page-specific facts, calculator explanations, or training guidance. - Do not treat calculators as personalized medical, nutrition, or training prescriptions. - For injury, recovery, nutrition, or health-adjacent content, retain the page's medical-review context and supporting sources where available. - Prefer current page content over this index if there is any discrepancy.