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Sauna Wood Calculator
Estimate the amount of wood needed for your custom sauna project
Prefer a Done-For-You Solution?
Custom Sauna Design Service
Get expert help with your sauna project. We'll design your custom sauna, create a materials list, and provide a complete quote.
Planning a sauna project? Use our calculator to estimate the amount of wood you'll need for walls, ceiling, and benches. For more information about custom sauna building, visit our sauna building guide.
1. Interior Dimensions
Enter the interior dimensions of your sauna room. Measure the finished interior space where wood will be installed.
💡 Standard sauna ceiling height is 7 feet. Measure L×W×H of your interior space.
2. Doors & Windows
Enter the dimensions of doors and windows that will reduce the wall coverage area.
Door #1
3. Benches
Configure your sauna benches. Standard saunas typically have upper and lower benches. Shop our sauna bench wood collection for high-quality bench materials.
Lower Bench
From floor to bench top
Upper Bench
From floor to bench top
4. Wood Selection
Choose your preferred wood types and sizes for your sauna. Browse our sauna wall wood collection for high-quality cladding options.
Wall & Ceiling Cladding
Bench Materials
Gaps between bench slats allow airflow and drainage
We recommend at least 10% waste allowance for cuts, defects, and mistakes
Calculation Results
Please enter your sauna dimensions above and click "Calculate Materials" to see results.
Your Sauna:
✓ Shopping list copied to clipboard!
Wall & Ceiling Materials
Net Wall & Ceiling Area:
0 sq ft
Total Cladding Boards Needed:
0 boards
Bench Materials
Bench Top Boards Needed:
0 boards
Bench Frame Boards Needed:
0 boards
Important Notes
- • These calculations include a 10% waste factor for cutting, defects, and mistakes.
- • For tongue and groove cladding, we've used the actual coverage width per board in calculations.
- • Bench slat counts use a slat-by-slat method — each slat must span the full bench length.
- • Bench frame estimates include two long rails, cross supports every ~20", and legs every ~24".
- • Actual material needs may vary based on specific design details and construction methods.
- • Always purchase extra material to account for unexpected needs or future repairs.
Need Help With Your Project?
Our custom sauna design service includes personalized material lists, layout recommendations, and expert guidance for your specific space.
Sauna Wood Options
Choose from our selection of premium sauna woods, each with unique characteristics ideal for different sauna applications. Learn more about sauna wood types.
Aspen
Light colored, splinter-free wood with minimal scent, perfect for those sensitive to strong aromas.
Shop Aspen Wood →
Thermo Aspen
Heat-treated for enhanced durability and moisture resistance with an attractive caramelized appearance.
Shop Thermo Aspen →
Alder
Rich, darker appearance with excellent durability and minimal knots. Popular in Finnish saunas.
Shop Alder Wood →
Thermo Spruce
Thermally modified for stability with reduced resin content and enhanced insulating properties.
Shop Thermo Spruce →
Cedar
Classic choice with rich aroma, natural resistance to moisture and decay. Traditional North American sauna wood.
Shop Cedar Wood →Browse All Sauna Wood
Explore our complete collection of premium sauna woods for walls, benches, and accessories.
Shop All Sauna Wood →About This Calculator
This calculator provides an estimate of materials needed for your custom sauna project. It calculates the quantity of wood boards required for wall/ceiling cladding and bench construction based on your specific dimensions and wood selections.
How Calculations Work:
Cladding: Walls and ceiling are calculated surface-by-surface. For each surface, we determine the number of horizontal cladding rows (height ÷ board coverage width, rounded up), then compute total linear inches of boards needed. Because tongue-and-groove boards can be joined end-to-end with staggered joints, offcuts from one row can be reused in the next.
Bench tops: Each bench is calculated slat-by-slat. We determine how many slats fit across the bench depth (accounting for gaps between slats), then how many boards each slat requires based on bench length vs. board length. This prevents underestimation when bench length exceeds board length.
Bench frames: Estimated based on two long rails, cross supports spaced approximately every 20 inches, and legs spaced approximately every 24 inches.
Wood Specifications Used:
Cladding Options:
- 1x4 Nickel Gap: 3.5" wide x 0.59" thick (3.1" coverage)
- 1x3 Medium Gap: 2.5" wide x 1.06" thick (2.2" coverage)
- 1x4 Medium Gap: 3.5" wide x 0.59" thick (3.3" coverage)
Bench Wood Options:
- 1x3: 2.5" wide x 0.83" thick
- 1x4: 3.5" wide x 0.83" thick
- 5/4x3: 2.5" wide x 1.1" thick
- 5/4x4: 3.5" wide x 1.1" thick
- 5/4x6: 5.5" wide x 1.1" thick
Available board lengths: 47½", 59⅛", 94¾", and 118¼".
Ready to Start Your Sauna Project?
Whether you're DIY building or need expert guidance, we're here to help you create your perfect sauna.
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