Home Large Pour Calculator
Deep Pour Epoxy & River Table Calculator
Calculate exact deep pour epoxy for river tables, countertops, and thick pours in liters, gallons, and resin weight. Use as an epoxy river calculator or epoxy volume calculator for deep pours, coatings, and countertop coverage estimates. No sign-ups. Instant results.
💡 Quick reference
Typical river table (180cm × 15cm × 5cm): ~15.5 liters (4.1 gallons) of deep pour epoxy
Tabletop / countertop flood coat: use the Table Top Epoxy Calculator for thin-coat coverage by surface area and thickness
Deep pour vs standard: For thick castings, use deep pour epoxy↗ whose published maximum pour depth covers your project; table-top epoxies are intended for thinner coating applications
Enter your exact dimensions in the calculator below for precise gallons and cost estimate.
💡 Tip: For a thick casting, choose deep pour epoxy↗ rated by its manufacturer for your planned depth. Maximum pour depth and recoat timing are product-specific.
Example calculation
Let's calculate resin for a typical river table:
| Parameter | Value |
|---|---|
| Project type | River Table |
| Table length | 180cm (71 inches) |
| River width | 15cm (6 inches) |
| Pour depth | 5cm (2 inches) |
| Add 15% buffer | Yes |
| Total resin needed | 15.5 liters (4.1 gallons) |
Calculation: 180cm × 15cm × 5cm = 13,500 cm³ = 13.5L + 15% = 15.5 liters
Epoxy coverage calculator: common project sizes & resin amounts
| Project Type | Dimensions | Resin Needed | Cost Estimate |
|---|---|---|---|
| Small River Table | 120cm × 10cm × 5cm | 6.9L (1.8 gal) | $145-180 |
| Medium River Table | 180cm × 15cm × 5cm | 15.5L (4.1 gal) | $325-410 |
| Large River Table | 240cm × 20cm × 6cm | 33.1L (8.7 gal) | $695-870 |
| Coffee Table Coating | 120cm × 60cm × 3mm | 2.5L (0.66 gal) | $50-70 |
| Countertop Coating | 300cm × 60cm × 3mm | 6.2L (1.6 gal) | $130-165 |
💡 Resin cost: $21-27 per liter ($80-100 per gallon) for deep pour epoxy
🛒 Match your project size above to the right deep pour epoxy↗ quantity before ordering.
Large pour safety & success tips
⚠️ Use epoxy rated for your pour depth
Deep pour epoxy↗ is formulated for thick castings, but maximum pour depth varies by product. Check the exact label or Technical Data Sheet before choosing the layer depth.
🌡️ Watch for heat buildup
Large pours generate heat (exothermic reaction). If your planned depth exceeds the product's published maximum per pour, divide the casting into layers and follow that product's recoat window.
🪵 Seal wood properly
Porous wood can release air into a casting. If your epoxy system recommends a seal coat, apply it and follow the manufacturer's stated recoat window before the main pour.
🎨 Mix pigments thoroughly
Large pours show color inconsistencies. Mix pigments↗ in Part A completely before adding Part B. Use drill mixer for large batches.
🛒 Shop supplies:
Deep pour epoxy vs standard table top epoxy
Deep Pour Epoxy (For River Tables & Thick Pours)
Pour thickness: Product-specific — follow the published maximum per pour
Cure time: Product-specific; deep-pour systems generally cure more slowly than coating epoxies
Working time: Product-specific and affected by temperature and mixed mass
Cost: $80-120 per gallon
Best for: River tables, thick castings, deep molds, large sculptures
Deep-pour formulas are designed to manage heat in thicker castings. Choose a product whose published maximum pour depth and cure schedule match your project rather than relying on a universal depth cutoff.
Standard Table Top Epoxy (For Coatings Only)
Pour thickness: Product-specific; table-top systems are intended for relatively thin coating layers
Cure time: Product-specific
Working time: Product-specific
Cost: $40-70 per gallon
Best for: Bar tops, countertop coatings, thin art pieces
Table-top epoxy is formulated for coating applications rather than deep castings. Use it only within the exact product's published coating thickness and application limits.
💡 Rule of thumb: Match the epoxy to the planned depth. For a river channel or other thick casting, use a casting/deep-pour product whose Technical Data Sheet explicitly supports that depth.
River table resin guide
Material costs for river tables
Resin: $210-870 depending on table size (10-40 liters needed)
Wood slabs: $50-300 (walnut, oak, maple - depends on quality and size)
Pigments: $20-40 (mica powder, alcohol ink, resin tints)
Sandpaper & finishing: $30-50 (80-3000 grit progression, polishing compound)
Seal coat: $15-30 (thin epoxy for sealing wood before main pour)
Table legs/hardware: $50-150 (metal hairpin legs or wood legs)
Total materials: $375-1,440 depending on size and wood choice
Pricing & profitability
Small river table (120cm): $600-900 retail (materials $200-300, 3× markup)
Medium river table (180cm): $1,200-1,800 retail (materials $400-600, 3× markup)
Large river table (240cm): $2,000-3,500 retail (materials $700-1,000, 3-4× markup)
Custom/premium designs: $2,500-5,000+ (exotic wood, LED lights, special pigments)
Labor for river table: 15-25 hours (planning, wood prep, seal coat, pouring, curing time, sanding, finishing, assembly). At $30-50/hour skilled labor = $450-1,250 labor cost. Use our Resin Cost Calculator to determine exact profitability.
Step-by-step river table process
Prep: Prepare the slabs, build the mold or dam, and seal porous wood if your epoxy system recommends it.
Pour: Mix and pour within the product's stated working time and maximum pour depth.
Additional layers: If more depth is required, follow the manufacturer's recoat window before the next layer.
Finish: Demold, sand, polish, and attach hardware only after the product has reached the cure stage required for those operations.
Use the epoxy resin calculator to plan material quantities across your full project.
Large pour resin calculator FAQs
How much resin do I need for a river table?
For a typical river table (180cm long × 15cm river width × 5cm depth), you need approximately 13.5 liters of resin plus 15% buffer = 15.5 liters total (4.1 gallons). Smaller 120cm tables need 6-7 liters, while large 240cm tables need 30+ liters. Calculate exact amounts by multiplying length × width × depth in centimeters, dividing by 1000 for liters, then adding 15% buffer. Use deep pour epoxy↗ for any river table pour.
Can I pour all the resin at once for a river table?
You can pour the full river depth at once only when the exact epoxy's published maximum pour depth covers the planned casting. If the project is deeper than that limit, divide it into layers and follow the manufacturer's recoat window. Do not rely on a universal 1-inch, 2-inch, or 4-inch rule—maximum depth varies by formulation.
How much does resin cost for a river table?
Deep pour epoxy costs $80-120 per gallon (3.78 liters), or $21-32 per liter. A typical medium river table needs 12-15 liters = $252-480 in resin alone. Add wood slabs ($50-200), pigments ($20-40), sandpaper and finishing supplies ($30-50), table legs ($50-150). Total material cost: $402-920 for medium table. Sell finished river tables for $1,200-2,000 (3× markup) for healthy 67% profit margins.
What type of resin is best for river tables?
Use deep pour epoxy↗ or another casting epoxy whose Technical Data Sheet explicitly supports your planned depth, total mixed mass, and cure conditions. Table-top coating epoxies are intended for thinner surface applications, so do not substitute one for a deep casting unless the manufacturer specifically permits it.
How long does a river table take to cure?
River-table cure time depends on the exact deep-pour epoxy, pour depth, mixed mass, and temperature. Handling, demold, sanding, recoat, and full-cure times are not interchangeable. Use the product's current Technical Data Sheet for those milestones and plan additional time when the project requires multiple layers.
Do I need to seal wood before pouring resin?
Sealing porous wood is commonly used to reduce outgassing and absorption, but the compatible seal coat and recoat timing depend on the epoxy system. Follow the resin manufacturer's instructions for sealing wood and for the correct stage or time window before the main river pour.
How do I prevent bubbles in large pours?
Reduce bubbles by minimizing air during mixing and pouring, controlling porous-wood outgassing, and following the exact epoxy manufacturer's bubble-removal guidance. Some systems permit brief surface heat while others have different limits, so do not apply a torch or heat gun↗ unless the product instructions allow it.
For a complete diagnosis of any bubble problem — surface bubbles, outgassing wood, inter-layer air — use the Resin Bubble Troubleshooter.
Can I add color to river table resin?
Yes! Use resin-specific pigments↗, mica powder, or alcohol ink. Popular river colors: metallic blue, ocean teal, silver, gold, black. Add pigment to Part A, mix thoroughly with drill mixer for large batches, then add Part B. For large pours, inconsistent color mixing shows as streaks—mix very thoroughly. Use our Resin Color Mixing Calculator to determine exact pigment amounts. Start with less pigment—you can always add more, can't remove it.
How much can I sell river tables for?
Small river tables (120cm): $600-900. Medium river tables (180cm): $1,200-1,800. Large river tables (240cm+): $2,000-3,500. Premium custom designs with exotic wood, LED lights, or special features: $3,000-6,000+. Material cost is typically 25-33% of retail price (3-4× markup). Labor cost (15-25 hours at $30-50/hour) is another 25-40%. Profit margins are healthy at 30-50% gross profit. Use our Resin Cost Calculator to price tables profitably based on your actual material and labor costs. Use the epoxy resin calculator to plan material quantities across your full project.