General Tools

13 tools available

Find the shared tools that apply across endurance sports: heart-rate zones, unit conversion, taper dates, age grading, body metrics, hydration estimates, and race-morning organization.

  • Switch units
  • Set heart-rate zones
  • Organize race week

Organize the final approach to race day

Use your chosen race date to inspect one taper-volume model, build the morning schedule, and keep an event-specific checklist.

Race Cutoff Pace Planner

Calculate constant moving pace after stops and a safety buffer.

RunningGeneral

Hydration Bottle Planner

Turn an hourly fluid target into total fluid and bottle count.

NutritionCyclingTriathlonGeneral

Race-Morning Timeline Planner

Work backward from the start time to key race-morning actions.

GeneralRunningTriathlon

Triathlon Race Day Checklist

Build, save, reorder, and share a customizable race-day gear and preparation checklist.

TriathlonGeneral

Advanced HR Zone Calculator

Calculate heart-rate training zones with Karvonen, maximum-HR, or running-specific lactate-threshold methods.

GeneralRunningCycling

VO2 Max Calculator & Fitness Estimator

Estimate VO2 max from a Cooper 12-minute test, 1.5-mile run, or maximum-to-resting heart-rate ratio.

RunningGeneral

Race Taper Volume Calculator

Explore one illustrative exponential pre-race relative-volume curve.

GeneralTriathlon

Sweat Rate & Hydration Calculator

Estimate measured sweat rate from body-mass change, fluid intake, urine loss, and duration.

NutritionGeneral

Reference Weight Formula Comparison

Compare historical Hamwi and Devine height-based reference weights with clear limits—never presented as ideal racing or weight-loss targets.

NutritionGeneral

Running Age Grade Calculator

Calculate a running age-grade percentage and age-adjusted time for ages 30–99 at 5K, 10K, half marathon, or marathon.

GeneralRunning

BMR & TDEE Calculator for Athletes

Estimate BMR and activity-adjusted daily energy expenditure with published equations.

NutritionGeneral

BMI Calculator

Calculate your Body Mass Index with WHO classifications.

NutritionGeneral

Athlete Unit & Pace Converter

Convert athlete distance, weight, speed, and running pace units.

General