Tapes and rules for measuring

Why when I measure a wall with a tape measure in inches I get different numbers than my meter stick in centimeters. I used the conversions and double checked everything multiple times?

What is Measuring Tape? Definition, Units, Example, Facts

Starrett Measure Stix Self-Stick Tape Rules 1/2 wide 6' long - r-l - inches

Professional quality 25ft / 7.5m steel tape measure with easy-read fractions and wide-read numbers, 1/32 inches for the first foot and 1/16ths for the

Series 100 - 25ft / 7.5m Professional Wide-Read Magnetic-Tipped Steel Tape Measure

All About Tape Measure for Sewing: Ultimate Guide

Tape rules, diameter

How to Read a Tape Measure

Tape Measures By Length

How to Read a Measuring Tape: Imperial and Metric Markings