I measure 2-3 homes  a day.  This Bosch laser is one of the 2 I carry w/ me.  It's less expensive on Amazon than Home Depot.  Around $40.  They have some other versions for close to $60.

A professional.  Although he/she may not like being called a "tool".   

Haven't a clue, as I always hire a professional to do my floor plans and home measurements.

Our appraisers measure the rooms. We cannot quote measurements as an agent. Hire a professional and the problem is solved.

laser 

Katina,

Hiring a professional to do that.  Then you are covered from any mistakes, etc.  A

Thankfully, our MLS does not require room dimensions.  I do not measure rooms ... so I have no tool to recommend. 

I'm with Michael Jacobs - I hire the professionals to measure, photograph and videograph!  Worth every penny to me!

My photographer and his camera create a floorplan & measurements so I no longer worry about such things!

I don't know what best means but a tape measure is still best for me.

A Fat Max

I use a sonic measuring device

A good old fasioned tape measure!

I use the Bosch laser, it's fun and accurate.

tape measure in my hands

I have both a laser and a regular tape measure

Katina Hargrove 352-551-0308 Commercial properties are measured differently so a good old tape measure works best.

I like the suggestion by Debbie Gartner. 

A laser purchased at Sears. At the time $22.

However, more important than the measuring device will be the 'disclaimer.'

Do not rely on the disclaimer printed on the footer of the mls sheet. Repeat the disclaimer in the description.

I have a laser measure tool

Tape measure or laser-tape measure.

We measure for the MLS only though.

For accuracy, the good ole tape measure will do

the architects plan for a new home!!!  my peeps hire a company to provide a floor plan and approx dimensions....

Walking in equal strides. Oh wait that was the old days, now it is a laser tape measure

laser tape measure

I use a digital device!

I have a very accurate laser measuring device.

My Stanley Laser is great.!

Thanks Debbie.

Laser measurers and an appraiser!

I use a digital laser myself - works great and is very easy

My favorite is a laser measuring device. If it is proven accurate I would use it to do interior measurements. 

Katina Hargrove 352-551-0308 - there are some electronic distance measuring instruments.

A digital tape measuring tool.

There are digital measuring devices that work great. 

An architect.

tape measure

Whatever the buyer brings without using my assistance.

Measuring tape.

I use a BOSCH laser - It's easy and does the trick!

An accurate tool.

   Laser.