The side that holds the drain opening determines what type of tub you need. For most of the world, it's probably in Liter, a standard unit to measure capacity or space or volume. But don’t assume a bathtub you’re replacing has standard measurements, take time to measure the space and determine the size of bathtub that can reasonably be installed there. When choosing a bathtub, it makes good sense to choose one that will comfortably fit the largest person who intends to use it. Next, measure the width of your tub from the back wall to the front with the same techniques for the length. If you do not want to go all the way up, although most people do, the minimum height you will want to go is about 70 inches. Continue to 6 of 6 below. Install the New Tub Drain Fitting . In the US, gallon is the stand for fluid capacity, but cubic feet is often used for space capacity. Do not follow the curve of the tub; measure straight down. Here are the best bathtubs available with pros and cons on why they may be right for your bathroom design. Use the old fitting to determine the size of your drain. Installing a bathtub is a complex job that shouldn't be attempted by novices. Measure straight down from the center of the overflow to the point at which the drain is mounted to the tub: depending on what's easiest to get to, you can measure from outside the tub down to its underside, or from inside the tub to the tub floor. ... • Do indicate the precise location of the center-line of the current toilet, bidet, sink or vanity, and bathtub and/or shower. It can also be helpful information when you are buying or selling a house and are evaluating the efficiency of the plumbing fixtures. Before you begin, measure your current bathtub alcove. ... To make sure you choose a bathtub that fits, carefully measure the area where you want your tub to be placed. Do not follow the curve of the tub; measure straight down. How do I measure a bathtub for a remodel? To find out what type of tub you need, face the alcove. Stand in front of the bathtub, like you were about to get in. Measure the perimeter of the shower tile area if you plan to use border tiles. Our bathtubs come in a wide range of sizes, shapes, configurations and depths ensuring that you can find the right tub for your needs. In a lot of cases, that will mean a standard bathtub, which have interior measurements of five feet long, thirty inches wide, and fourteen to sixteen inches high. Measure the length and width of your bathtub, then divide. The next measurement you will need is from the top of the tub to the ceiling. Width: 30 inches. Asked in Home Improvement, Plumbing How do you find the center mark for a bathtub? I would like to replace the tub/shower with a new tub/shower. Water pressure dictates how forcefully water flows out of your faucets. 1. Height: 15 inches. This will help you determine the appropriate size for your bathtub. At American Standard, we know the value of a bathtub, used for everything from a relaxing soak to bathing your kids or washing the dog. I would like to replace the tub/shower with a new tub/shower. How to Install a Bathtub. For example, divide length-of-land / length-of-bathtub, and width-of-land / width-of-bathtub. Keep in mind that most standard bathtubs are five feet long and either 30 or 32-inches wide. In a lot of cases, that will mean a standard bathtub, which have interior measurements of five feet long, thirty inches wide, and fourteen to sixteen inches high. When you are installing a new bathtub surround, you want to make sure that you are getting the measurements just right.If you are tiling, and you don't measure it correctly, you can end up with big problems. ... For most of the world, it's probably in Liter, a standard unit to measure capacity or space or volume.