Unit Conversions for Fitness & Health

Whether you are lifting weights at a gym with metric plates, training for a 5K or marathon, tracking nutrition, or monitoring your BMI, fitness involves constant unit conversion. American gyms often use pound plates, while Olympic competition and most international gyms use kilograms. Running races are measured in kilometers worldwide. This page has all the conversion tools and reference tables you need.

Most Used Conversions

Weight Converter

KG to LBS for gym weights

Length Converter

KM, miles for running

Speed Converter

Pace and speed conversions

BMI Calculator

Body mass index

KG to LBS

Quick weight plate conversion

Pounds to Kilograms

Body weight conversion

Miles to Kilometers

Running distance

Centimeters to Inches

Height conversion

Feet to Meters

Height for BMI

Temperature Converter

Pool and weather temps

Quick Reference: Gym Weight Plates

Metric (kg)Imperial (lbs)Common Item
1.25 kg2.76 lbsFractional plate
2.5 kg5.51 lbsSmall plate
5 kg11.02 lbs10 lb plate equivalent
10 kg22.05 lbsGreen Olympic plate
15 kg33.07 lbsWomen's Olympic bar
20 kg44.09 lbsMen's Olympic bar / blue plate
25 kg55.12 lbsRed Olympic plate

Quick Reference: Running Distances

RaceKilometersMiles
1 Mile1.609 km1.000 mi
5K5.000 km3.107 mi
10K10.000 km6.214 mi
Half Marathon21.098 km13.109 mi
Marathon42.195 km26.219 mi
Ultra (50K)50.000 km31.069 mi

Recommended Tools

BMI Calculator

Calculate BMI with metric or imperial inputs

Age Calculator

Exact age for fitness assessments

Related Guides

Pounds vs Kilograms

Weight units compared

Miles vs Kilometers

Distance units for running

KG to Pounds Guide

Detailed weight conversion guide

Celsius vs Fahrenheit

Temperature for outdoor training