Slide Types & Sizing
Proper drawer slide selection ensures smooth operation, adequate load capacity, and long-term durability.
Last updated: 2026-02-27
Drawer Slide Calculator - Drawer Dimensions & Slide Size Guide
Free drawer slide calculator for perfect drawer fit. Calculate correct drawer dimensions, slide sizes, clearances, and load ratings for ball bearing slides, soft-close, and full-extension slides. Determine mounting specs for cabinets, dressers, and furniture. Includes slide type comparison and weight capacity guide. Get the perfect fit every time!
Hardware Sizing Weight Capacity Clearance Analysis Professional Grade
Drawer Specifications
Slide Type
Drawer Dimensions
Load Requirements
Hardware Specifications
Enter drawer specifications to calculate slide requirements, clearances, and hardware recommendations for your project.
Ensure proper weight capacity and mounting specifications for safe operation. Verify slide compatibility with cabinet construction. Follow manufacturer installation guidelines and use appropriate fasteners for your application.
Calculations are reference guidelines. Always verify with manufacturer specifications for your specific slide model.
How to Use This Calculator
- 1 Select Slide Type Choose from 6 types: Side Mount, Center Mount, Undermount, Soft Close, Heavy Duty, or Full Extension.
- 2 Enter Drawer Dimensions Input drawer width, depth, height, and cabinet depth. Measurements determine slide length and clearances.
- 3 Set Load Requirements Enter expected weight load and usage frequency (light/medium/heavy) for capacity recommendations.
- 4 Review Specifications Get slide length, clearance requirements, weight capacity rating, and mounting specifications.
Pro Tip: Drawer slide length should be 2-4 inches shorter than cabinet depth. For a 24" deep cabinet, use 20" or 22" slides. Full-extension slides provide complete access but cost more. Always choose slides rated for 1.5-2x your expected load.
| Slide Type | Capacity | Clearance | Best For |
|---|---|---|---|
| Side-Mount (Epoxy Coated) | 75-100 lbs | 1/2" each side | Standard cabinetry, DIY |
| Center Mount | 35-75 lbs | None (bottom mount) | Light drawers, retrofits |
| Undermount (Soft-Close) | 75-150 lbs | Clean appearance | Premium kitchens, quality furniture |
| Soft-Close | 75-100 lbs | 1/2" each side | Kitchen cabinets, bathrooms |
| Heavy-Duty Ball-Bearing | 100-500 lbs | 1/2"-3/4" each side | Commercial, tool drawers, file cabinets |
| Full Extension | 75-150 lbs | 1/2" each side | Full access, kitchen base cabinets |
Capacity ratings are per pair of slides. Always verify with manufacturer specifications.
Slide Length = Cabinet Depth - 2" (face frame clearance) Installation Guidelines
Mounting Best Practices
Mounting Best Practices
- Height: Mount at drawer bottom for stability
- Level: Slides must be perfectly level (use shims if needed)
- Depth: Front edge flush with cabinet face frame
- Screws: Use all mounting holes for maximum strength
- Spacing: Minimum 3" between stacked drawer slides
Weight Capacity Guide
Choose slides rated for 1.5-2x your expected load for safety and longevity.
| Application | Typical Load | Recommended Capacity | Slide Type |
|---|---|---|---|
| Kitchen utensil drawer | 20-40 lbs | 75 lbs | Side-mount or soft-close |
| Kitchen pot/pan drawer | 40-80 lbs | 100-150 lbs | Full extension, heavy-duty |
| File cabinet drawer | 60-120 lbs | 150 lbs | Heavy-duty ball-bearing |
| Tool chest drawer | 80-200 lbs | 200-500 lbs | Heavy-duty, locking |
| Bathroom vanity | 15-30 lbs | 50-75 lbs | Undermount or side-mount |
Choose slides rated 1.5-2x expected load. Add weight of drawer box itself to contents weight.
Glossary of Terms
The most common type, attaching to the sides of both the drawer and cabinet. Requires 1/2 inch clearance per side. Available in 3/4 and full extension.
Mounts beneath the drawer box, hidden from view when open. Provides clean appearance. Requires precise installation and specific drawer box construction.
Slide that allows the drawer to open completely, providing 100% access to drawer contents. Uses three-section telescoping design.
Uses steel ball bearings for smooth, quiet operation. Higher load capacity than roller slides. Standard in quality cabinetry.
Integrated damper mechanism that catches the drawer in the last 1-2 inches and closes it slowly. Prevents slamming and reduces wear.
The gap between drawer box and cabinet interior required for slide mounting. Side-mount: 1/2 inch per side. Undermount: specific bottom clearance per model.
The front frame of a cabinet that provides structure and hinge/slide mounting surface. Slide front edge should align flush with face frame interior edge.
Maximum weight capacity per pair of slides. Measured in pounds (lbs). Choose 1.5-2x expected load for reliability and safety margin.
Frequently Asked Questions
How do I determine the correct drawer slide length?
Drawer slide length should be 2-4 inches shorter than your cabinet depth. For a 24" deep cabinet, use 20" or 22" slides. Full-extension slides provide complete drawer access, while 3/4 extension slides are more economical.
What weight capacity do I need for my drawer slides?
Choose slides rated for 1.5-2 times your expected load. Kitchen drawers typically need 75-100 lb capacity, while file drawers may require 100-150 lbs. Heavy-duty applications can need 200-500 lb capacity slides.
What's the difference between side-mount and undermount slides?
Side-mount slides attach to drawer sides and are easier to install. Undermount slides attach to the drawer bottom, providing a cleaner appearance but requiring more precise installation and specific clearances.
How much clearance do drawer slides need?
Side-mount slides typically need 0.5" clearance on each side (1" total). Undermount slides require specific bottom clearances (usually 0.75-1"). Always check manufacturer specifications for exact requirements.
Are soft-close drawer slides worth the extra cost?
Yes, soft-close slides prevent slamming, reduce wear on cabinets, and provide a premium feel. They're especially valuable in kitchens and high-use applications where drawers are opened frequently.
Can I retrofit existing drawers with new slides?
Often yes, but you'll need to verify clearances and mounting compatibility. Measure existing slides and cabinet openings carefully. You may need to modify drawer boxes or cabinet interiors for proper fit.