Bathroom Vanity Calculator
Estimate vanity width and countertop area
Width of the vanity wall
Single or double sink
Countertop Area
—
sq ft
Vanity Width
—
in
Estimated Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
A well-sized vanity balances storage, sink space, and walkway clearance. Accurate dimensions help you order the right cabinet, countertop, and plumbing fixtures.
- Measure the available wall width for the vanity
- Choose single or double sink layout
- Calculate to get vanity width and countertop area
- Use the cost estimate to budget your remodel
Expert Insights
Smart analysis for your Kitchen & Bath project
Width Conversion
Vanities are measured in inches. AI converts wall width (ft x 12) to match standard vanity sizing for accurate ordering.
Sink Count Scaling
Double-sink vanities double the plumbing and countertop cost. AI multiplies cost by the number of sinks you select.
Countertop Sizing
Countertop area = wall width x 1.5, allowing for a 22-inch depth plus overhang. AI helps you order the right slab size.
Calculation Formula
Sinks = 2 Sinks ? 2 : 1
Vanity Width = Wall Width x 12 (in)
Countertop Area = ceil(Wall Width x 1.5) (sq ft)
Estimated Cost = ceil(Vanity Width / 12 x $200 x Sinks)
Vanity Material Comparison
| Material | Cost per Ft | Water Resistance | Maintenance | Best For |
|---|---|---|---|---|
| Solid Wood | $200-400 | Good | Medium | Premium look |
| Plywood | $150-250 | Excellent | Low | Most bathrooms |
| MDF | $100-200 | Fair | Low | Budget remodels |
| Particleboard | $75-150 | Poor | High | Low-cost builds |
Authority References
Our calculations are based on guidelines and standards from these authoritative sources:
- NKBA (National Kitchen & Bath Association) — Bathroom Planning Guidelines. Learn more
- ANSI/IAPMO — Plumbing Fixture & Vanity Standards. Learn more
- ANSI A124 — Cabinetry Dimensional Standards. Learn more
Frequently Asked Questions
What is the standard bathroom vanity width?
Single-sink vanities are typically 24-48 inches wide, while double-sink vanities range from 60-72 inches. Width should match the available wall space with 1-2 inches of clearance.
How much countertop do I need for a vanity?
Countertop area is roughly 1.5 times the wall width in square feet, allowing for a standard 22-inch depth plus an overhang. Double-sink vanities need more surface area.
How much does a bathroom vanity cost?
Vanities cost about $200 per linear foot installed. Single-sink units run $300-1,500, while double-sink vanities range $800-3,000 depending on material and countertop type.