Bathtub Buying Guide: Materials, Sizes & What to Consider

How to Choose the Right Bathtub

A new bathtub transforms your daily routine and adds value to your home. From practical alcove tubs to statement freestanding designs, here is what to consider.

Installation Types

Alcove tubs fit between three walls — the most common and affordable option. Great for tub/shower combos. Top picks: KOHLER Bellwether (cast iron), KOHLER Villager.

Freestanding tubs stand independently as a bathroom centerpiece. Available in classic clawfoot and modern sculptural designs. Top picks: KOHLER Abrazo, KOHLER Ceric.

Drop-in tubs install into a custom surround — flexible for tile or stone surrounds. Top pick: KOHLER Archer.

Materials Compared

• Enameled cast iron — Most durable, retains heat, resists scratches. Heavy (300-400 lbs). KOHLER's signature material.
• Acrylic — Lightweight, warm to touch, more shape options. Reinforced for strength. Easier to install.
• Lithocast — KOHLER's premium solid-surface composite. Ultra-smooth, non-porous, thin walls.

Standard Sizes

• 60" — Standard alcove size, fits most existing spaces
• 66" — Extra length for taller bathers
• 72" — Luxury soaking, freestanding and drop-in only

Hydrotherapy Options

BubbleMassage (air jets) — Gentle, all-over massage. Quieter than whirlpool.

Whirlpool (water jets) — Deep tissue massage, adjustable intensity.

Heated surface — Keeps tub warm before, during, and after your bath.

Explore our complete bathtub collection to find the perfect fit for your bathroom.