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Running Calculators

CalculatorGeek running tools.

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Running Race Planner Calculator

Build exact even, negative, or positive running splits with checkpoint times, stopped time, start delay,…

Easy to use
Specialist tools

VO2 Max Calculator

Estimate VO2 max from a measured Cooper 12-minute run distance, with pace and speed checks,…

Easy to use
Everyday tools

Heart Rate Zone Calculator

Calculate five heart-rate training zones from measured or age-estimated maximum HR using heart-rate reserve or…

Easy to use

From the guide library

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Sports

Snowboard Size Chart

Use this snowboard size chart to compare board length and waist width by rider height, weight and boot size. Verify the exact model chart…

Sports

Beginner Snowboard Size Guide

Learn how beginners should choose snowboard size using rider weight, model charts, boot fit, flex, terrain, and a practical shorter-versus-longer trade-off.