Large Pour Resin Calculator

Q: How much does resin cost for a river table?

Deep pour epoxy costs $80-120 per gallon (3.78 liters). A typical river table needs 10-15 liters ($210-475 in resin alone). Add wood ($50-200), pigments ($20-40), sandpaper and finishing supplies ($30-50). Total material cost: $310-765. Sell finished river tables for $800-2500 depending on size and wood quality.

Q: How long does a river table take to cure?

Deep pour epoxy takes 72 hours to cure hard enough to sand and 7 days for full hardness. Multiple layer pours add 24-48 hours per layer. Total timeline: single pour river table 7-10 days, multi-layer deep table 2-3 weeks. Temperature affects cure time - warmer cures faster.

Calculate exact resin for river tables, countertops, and large art projects.
Supports deep pours, coating, and multi-layer applications.
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Calculator

Project type

Table length (cm) River width (cm) Pour depth (cm)

Add 15% extra (recommended for large pours)

JavaScript is required for the interactive calculator. Browse our specialized calculators below for your specific project type, or enable JavaScript for instant results.

💡 Tip: Use deep pour epoxy for pours over 2 inches. Standard epoxy will overheat and crack.

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

🛒 Large pour essentials: Deep Pour Epoxy • Large Mixing Buckets • Heat Gun • Resin Pigments • Digital Scale

Common large pour projects & 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

Large pour safety & success tips

⚠️ Use deep pour epoxy only

Deep pour epoxy is formulated for thick pours. Standard table top epoxy overheats in pours over 1-2 inches, causing cracks and yellowing.

🌡️ Watch for heat buildup

Large pours generate heat (exothermic reaction). Pour in layers if depth exceeds 2-3 inches. Allow 24-48 hours between layers for heat dissipation.

🪵 Seal wood properly

Seal porous wood with thin epoxy coat first. Prevents bubbles from wood outgassing into main pour. Wait 4-8 hours for seal coat to cure before river 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 • Mixing Buckets • Heat Gun

Deep pour epoxy vs standard table top epoxy

Deep Pour Epoxy (For River Tables & Thick Pours)

Pour thickness: 2-4 inches per pour (some brands up to 6 inches)
Cure time: 72 hours to handle, 7 days full cure
Working time: 45-90 minutes (longer for large batches)
Cost: $80-120 per gallon
Best for: River tables, thick castings, deep molds, large sculptures

Deep pour formulas have slow cure chemistry that prevents heat buildup (exotherm). This prevents cracking, yellowing, and bubbles in thick pours. Always use deep pour epoxy for pours over 1 inch thick.

Standard Table Top Epoxy (For Coatings Only)

Pour thickness: Maximum 1/4 inch (6mm) per pour
Cure time: 24 hours to handle, 72 hours full cure
Working time: 20-45 minutes
Cost: $40-70 per gallon
Best for: Bar tops, countertop coatings, thin art pieces

Standard epoxy cures faster and harder than deep pour, but generates too much heat in thick pours. Use only for coating applications (2-4mm thick). Never use for river tables or deep castings.

💡 Rule of thumb: Anything over 1 inch (2.5cm) thick requires deep pour epoxy. For river tables at 2-3 inches depth, deep pour is mandatory.

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

Day 1: Prepare wood slabs - sand flat, create dam with tape or foam, seal coat (thin epoxy brushed on wood edges to prevent bubbles). Let seal coat cure 4-8 hours.
Day 2: Mix resin with pigments, pour first layer (2-3 inches if using deep pour), torch bubbles. Let cure 72 hours minimum.
Day 5: If table requires more depth, pour second layer. Let cure 72 hours.
Day 8-10: Remove tape/dam, sand progression (80 → 120 → 220 → 320 → 600 → 1000 → 2000 → 3000 grit), polish with buffing compound.
Day 11-12: Attach legs, apply protective coating if desired, final quality check.

Why accurate calculations matter for large pours

Large pour projects are expensive—a medium river table uses 15+ liters of resin costing $325-410 in materials alone. Running short mid-pour is catastrophic because you can't remix the exact same color batch, and partial pours create visible seam lines that ruin the project. Over-ordering by 30-50% "just to be safe" wastes $100-200 per project in unused resin that has limited shelf life (6-12 months). Accurate calculations with 15% buffer hits the sweet spot—enough safety margin for waste and absorption without excessive cost.

The 15% buffer accounts for three sources of loss: mixing container residue (2-3% stuck to buckets and stirring tools), wood absorption (porous wood like oak absorbs 5-8% of resin into grain despite seal coat), and surface waste from torching bubbles and leveling (3-5% from drips and surface tension). Without buffer, you'll run 8-12% short on average. With excessive 25-30% buffer, you waste money on unused resin. The 15% recommendation is based on data from hundreds of river table pours by professional woodworkers.

Deep pour epoxy chemistry is fundamentally different from table top epoxy. Standard epoxy cures through exothermic reaction that generates significant heat. In thin coatings (2-4mm), heat dissipates quickly through large surface area. In thick pours (50mm+), heat builds up in the center reaching 200-300°F, causing yellowing, cracking, and sometimes smoking or melting. Deep pour formulas use slower hardeners that spread heat generation over 48-72 hours instead of 8-12 hours, preventing temperature spikes. This is why deep pour costs 2× more than table top epoxy— the chemistry is more complex and cure time is 3× longer, but it's the only way to pour thick river tables successfully.

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?

Only with deep pour epoxy specifically designed for thick pours. Deep pour epoxy can be poured 2-4 inches (5-10cm) at once depending on brand. Standard table top epoxy will overheat and crack in pours over 1 inch (2.5cm), causing yellowing and bubbles. For very deep river tables (5+ inches), pour in multiple 2-3 inch layers with 24-48 hours between pours to allow heat dissipation. Never rush thick pours—heat damage ruins projects.

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 designed for thick castings. Look for low exotherm formulas that can be poured 2-4 inches deep without overheating. Popular brands: TotalBoat ThickSet (2" max), Stone Coat Countertops Deep Pour (4" max), Alumilite Amazing Clear Cast (2" max), ProMarine Deep Pour (3" max). Never use standard table top epoxy for river tables—it will crack and yellow from heat buildup in thick pours.

How long does a river table take to cure?

Deep pour epoxy takes 72 hours (3 days) to cure hard enough to sand and remove from mold, and 7 days for full hardness and chemical resistance. If pouring multiple layers, add 24-48 hours per layer. Total project timeline: single pour river table 7-10 days start to finish, multi-layer deep table 2-3 weeks. Temperature affects cure time—warmer ambient temperature (70-85°F) cures faster, cold (<60°F) significantly slows curing.

Do I need to seal wood before pouring resin?

Yes, always seal porous wood with thin epoxy coat first. Brush or roll thin layer of epoxy on wood edges and surfaces that will contact resin. Let seal coat cure 4-8 hours (tacky to touch). This prevents air bubbles from wood outgassing into main river pour and stops resin from over-absorbing into wood grain. Skip seal coat at your own risk—bubbles in wood grain are nearly impossible to remove and ruin the finished piece.

How do I prevent bubbles in large pours?

Prevent bubbles with these steps: (1) Seal wood properly before pouring, (2) Mix resin slowly to minimize air incorporation, (3) Let mixed resin sit 5-10 minutes for bubbles to rise, (4) Pour slowly in thin stream from low height, (5) Use heat gun or torch immediately after pouring to pop surface bubbles. For deep pours, bubbles naturally rise over 24-48 hours cure time. Never overheat resin—causes more bubbles and accelerates cure (more heat).

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.