How To Measure a Hot Tub Spa Cover – Step-By-Step Guide
How to Measure a Hot Tub Spa Cover Correctly
If you are ordering a replacement hot tub spa cover, knowing how to measure your spa cover correctly is essential. Accurate hot tub cover measurements ensure your custom spa cover fits properly, seals tightly, and provides maximum insulation performance.
If you feel unsure at any point, call David the Cover Czar at 615-982-0395 before placing your order and we’ll walk you through it.
Step 1: How to Measure Hot Tub Spa Cover Length and Width
To measure your replacement spa cover correctly:
• Measure the spa shell from edge to edge
• Do NOT measure the old spa cover
• Measure the widest points across the acrylic shell
• Round to the nearest ½ inch
Example: 84" x 84"
These measurements determine your custom spa cover size. Measuring the spa shell instead of the old cover ensures proper fit and heat retention.
Step 2: How to Measure Spa Cover Corner Radius
The radius is the rounded corner of your hot tub.
To measure spa cover radius:
• Place a straight edge along both sides of the corner
• Measure from where the curve begins to where it ends
• That measurement equals your corner radius
Common hot tub spa cover radius sizes include:
• 2" radius
• 4" radius
• 6" radius
• 8" radius
• 12" radius
If you are unsure how to measure your spa cover radius, call David the Cover Czar at 615-982-0395 before ordering. A quick conversation can prevent costly mistakes.
Step 3: How to Measure Spa Cover Thickness and Taper
Most replacement hot tub spa covers taper from the center down to the edge.
Common spa cover thickness options include:
• 4" to 2" taper
• 5" to 3" taper
• 6" to 4" taper
Thicker foam cores provide better insulation and energy efficiency, especially in colder climates or windy environments.
If you are unsure which spa cover thickness is best for your location, David the Cover Czar can help you choose the right insulation level for long-term performance.
Step 4: How to Determine Spa Cover Hinge Direction
Stand facing the spa control panel.
Does your hot tub cover fold:
• Left to right?
• Front to back?
Correct hinge direction ensures proper strap placement and alignment with your spa cover lift if you have one installed.
If you are unsure about hinge direction, take a photo and call David the Cover Czar at 615-982-0395 before placing your order.
Common Replacement Spa Cover Measuring Mistakes
Avoid these common hot tub cover measurement errors:
❌ Measuring the old waterlogged spa cover
❌ Guessing the corner radius
❌ Forgetting hinge direction
❌ Rounding incorrectly
Taking accurate measurements ensures your custom replacement spa cover fits correctly the first time.
Frequently Asked Questions About Measuring a Spa Cover
Do I measure the old spa cover or the spa shell?
Always measure the spa shell, not the old swollen or waterlogged cover.
What is the most common spa cover radius?
Many hot tubs use a 4-inch or 6-inch radius, but always measure your specific spa to confirm.
What happens if I measure my spa cover wrong?
Call David the Cover Czar at 615-982-0395 before ordering and we will help verify your hot tub spa cover measurements.
Need Help Measuring Your Hot Tub Spa Cover?
Buying a custom replacement spa cover should not feel stressful.
If you are unsure how to measure a hot tub spa cover, call David the Cover Czar at 615-982-0395 or send us photos before placing your order.
Factory Spa Covers will help confirm your measurements so you can order with confidence.